Chromate conversion coatings on zine,cadmium,aluminium-zine alloys and zinc-aluminium alloys—Test methods
Some standard content:
1C8 25.22c.20
National Standard of the People's Republic of China
GB/19791—2003
971988
Chrontate conversion coatings on zinc, cadmium, aluminum-zinc alloys and zinc-aluminum alloysTest methods
(1S0 3613.2000.MOD3
2003-10-29 Issued
National Quality Inspection and Inspection Bureau of the People's Republic of China
2004-05-01 Implementation
GB/T 9791—2003
This standard collects the test method 3 for the conversion coating of aluminum alloy, aluminum alloy and aluminum alloy at 13:200℃ on January 15, 2003. The standard report [53613:2C07 was revised and amended as follows: The foreword of S03615 was supplemented;
1. "Standard" was used instead of "six international standard"! This standard is different from G9731--188 in that the test method for zinc-aluminum-zinc alloy and zinc-lead gold conversion film is as follows:
Added "Chapter 3 Test";
- Added 3.2\Total content of zinc-aluminum alloy and zinc-lead alloy conversion film:
- Added 5.4\Total content of aluminum-aluminum alloy (mass fraction: 5% A) and ... -9 Compatible with GB/T (7S1-988 No. 8, 6, 19: The calculation formula is omitted.
This standard is sponsored by the China Machinery Industry Federation: This standard is sponsored by the National Goldwind and Non-Golden Screen Standardization Technical Committee and the Wuhan Institute of Material Protection. The main drafters of this standard are: Yu Jingling, Xie Yundan, Qiu Tuofansuo. The previous versions of the international standards replaced by this standard are: GHT 97911933.
Test method for chromate conversion coating of zinc, aluminum-zinc alloy and zinc-aluminum alloy
GB/T 9791—2CG3
Warning: The substances and (reduced) methods to be used in this standard may be harmful to health if appropriate preventive measures are not taken. This standard only covers technical adaptability. It does not in any way relieve designers, manufacturers, suppliers or users from the responsibilities of regulations and all other laws related to health and safety at any stage of manufacture and application. 1 Specifications
Under the provisions of the standard, the following methods must be used: Presence of colorless conversion film:
Evaluation frequency score is 5AI) The mass fraction of the metal is the presence and content of colorless and colored complex salt conversion in alloy A;
Total volume per unit area; Unit volume mass of colorless and colored films; Quick conversion film drug use
Content of some films
These methods apply to the following:
Monthly comparison or! "Chemical method" produces different proportions of monovalent chromium and non-valent chromium salt conversion: the first layer (such as oil film or water drop dosage form model or frame membrane practice salt membrane 2 dam normative reference documents
The following documents are all quoted by the wood standard for the purpose of carefully introducing the reference curve, the details of the previous month's document, all its revisions (excluding the internal case) or revisions are applicable to this standard, of course, the currency, based on the development of this standard to encourage the parties to evaluate whether the product can be quickly compared with the new version of the document. It is a special document of the opening period, and its new version applies to the following standards. GH/T2223.4-1S93 Self-contained electrical product environment test Db; Change heat test supervision party reached J4 230: 1!RO
GR/E type 200 village material conversion film on the sheep area film mass gravimetric method (S: 2330.MO3
20-1% sensitive zinc complex acid conversion Chen c1) 4520: 1981G301251997 gas production full test super fog test e5710903 reducer
Unless otherwise specified, in the test process, only use the pure test column, distilled water or water of equivalent purity, 3.1 test rate liquid A (other 5.2)
资韩! mk diphenyl magnetic carrier "mL ice acid and mL frequency increase water mixed in a beaker: 2115mi. Concentrated salt aldehyde g = 1.18cu:. Rush production, slowly add: 1ml. Sodium hypochlorite drop solution (10% ~ 15 flash effective >, do not pick fresh mix. Intake compensation add people = over chemical), this liquid through the wide burning arms after the ambassador let: liquid not to aging blood deterioration, the total death to easy pounds. China insurance line ratio month,) will be colorless actual not to > sales of the whole dynamic conversion set "base" separation, need to calibrate the acid to reach the evil ratio, this "technical will not be pressure, blow out not, GH/T9791-2003
3. 2 test liquid B (tons, 5. 5)
Dissolve R trihydrate (II, CHP.H+11.5% water or deionized water. Prepare a natural solution with a pH of 5.5-6.3, and a pH close to this range. Discard the solution and prepare a new solution. After the color precipitate is formed during the preparation, ensure that the content of the solution is not less than 5.0, then dissolve it in acetic acid. If the solution is not dissolved in acetic acid, discard the prepared solution. 3.3 Test solution C (1.5%)
Discard 0.1 g two difference broken attached two stock rate two 23L pay and 20m ethyl stop (96 treatment> in the swim, rate new after 12mml75 outside the correct calibration Sa Di and 20m1. dye water, in the production of more than a few hours of this package. 3.4 test solution 3 see 5.5 and 5.
whole solution. S two carbonyl diols in 5ml. ketone. Stir slowly with 5ml. water release < this mud platform will strictly produce "this alkali two version precipitation
spell solution refrigerate Ding dark color take Rui Twist, make the rate of knocking the maximum, 3.5 sulfuric acid (1-3 dilute || tt || slowly add 1 stop according to the dilution rate 0-1.84gcm + 3 stop, 3.6 persulfate (NH! = || tt || 3. Sodium hydroxide a drop (24g/) || tt || 3.6 silver nitrate N concentrated solution 17/1 || tt || 3.9 potassium chromate (K, \r. 0. standard solution || tt || mix 2m1. acid concentration 4.9/L diluted to 10003.10 Phosphate ionizer
Decomposition of sodium disodium monohydrate NaHPO·HO in 10 ecmL water 4 Receiver
2, 1 Photoelectric colorimeter (colorimeter) Www.bzxZ.net
Equipped with a filter with a uniform transmittance of 2. This colorimetric measurement is compared with an absorption channel with an optical path length of 0 mm. 4.2 Spectrophotometer
is equipped with a collection cell with an optical path length of 10 mm. 5 Test method ||t Before the following tests, the test surface should be free of stains, printing or other external treatments. If the surface is oiled, it should be removed with an appropriate temperature before the test at a temperature not exceeding 3 °C. For the test, the sample is not allowed to be treated with liquids at a higher temperature. If the chromium-aldehyde conversion is observed, the following formula is used: a) The colorless zinc acid conversion of the alloy is tested at a rate of 0.04%! e) Determination of the content of hexavalent iodine in colourless and coloured chromium aldehydes: e) Determination of the total chromium content. The test shall be carried out within the following time range: All tests (5.2-101) shall be carried out at least 24 h after the total chromium conversion film is formed. 5.2-5.5 are defined as tests. The tests shall be carried out within 3 days after the formation of the chromium iodide conversion film. 2) 5.3 and 5.7 shall be carried out within 3 days after the formation of the chromium iodide conversion film. The following test methods shall be used to determine the visual quality of the chromium iodide conversion film per unit area: h) The quality evaluation of these films shall be carried out by the culture method. 5.2 Test for the presence of colourless chromium iodide on zinc iodine: GH/T 9791—2003
Full one liquid test light liquid 4 (3.1: The sample treated with the salt conversion film: if red or reddish red appears on the surface of the sample, it must be converted.
5.3 The test of the colorless chromic acid film on the zinc copper is full of a lubrication test. B3.2> For the test, if the surface is full of 3mm and the test solution is dripped for at least 1min, dark black spots appear on the mountain, which should be judged as the colorless salt conversion.
%! The black spots in the shape of war are said to increase the level of the cover stock, such as wax or oil. If it is an energy matrix, observe the concentration drop "i": when the test case is dripped for at least three minutes, a stain or black spot is formed next to the skin, indicating the presence of a chemical film.
1 After the comparison, the shadow formed can indicate the presence of an energy-enhancing effect: for example, wax or oil. The total mouth recall method is designed to test the surface of the sample that has been treated with salt conversion treatment. The sample is installed on the surface of the sample. The reverse comparison is used. The steel bar that has not been treated is in a normal state, or the salt conversion treatment is also carried out according to the table without any seams. It will react with the lead acetate solution and form a glass in the test table within 2~5 minutes after dripping the test concentration. Note: The above method causes the test environment to be micro-standard and the two people are responsible for the control of the workpiece. The quality of the workpiece is changed. This method is tested at the beginning. Let: the road to the inner layer of the conversion will be reduced quickly. The test step is not allowed to find the product model on the vehicle, and the salt conversion or salt production is the same shape. The stem can be related to the time. Find the net out rate to the texture rough! 1. The company starts the acidification and the temperature changes along the wind. The net decoration is controlled before and after the time. There is a shadow of this arrangement. The product sits on the mountain. The time is the starting point: the sample is taken: this test does not use the same type of acid treatment as the cattle. The whole vehicle film is taken. The benefits of the film.
5.4 lead-zinc (then the mass fraction is \AI known zinc-aluminum mass fraction is AI alloy on the colorless chromium salt conversion reflection of the test will be reduced to ten GB2 423. The accelerated heat test specified in the regulations reaches 24. The formation of black spots on the surface of the main part shall be judged as no car in the aldehyde conversion: some of the chain aldehyde station frequency employment, then the surface appearance of the collection of no difference in the book 5.5 fish and colored chromium film in the test 1--= C: 3.3) and. The presence of hexavalent chromium in the film will not appear in the color of the red envelope. Do not consider the same time when the color, such as liquid color, in order to compare the same method of testing the surface of the sample.
Comparison of foreign films
5.E Determination of the content of hexavalent chromium in colored zinc ether salts 5.E.1 Preparation of calibration curve
E.6.1.1 In the 9-9 5.6.1.2 Take 10ml of the liquid from the volumetric flask (i.e., empty it, 10ml of the liquid, 2uml, 30ml of the solution, 13ml of potassium chromium pentoxide solution (391ml), add 11ml of water and 3[.sulfur] to each flask to make the whole solution 13.5). Add 3-11.1ml of the test solution to a bottle and mix for 2min. Add 2ml of phosphoric acid buffer (310) and mix until the mixture is dissolved. Repeat this procedure 5.6.1.2. Place each transfer in a separate volume and place in a colorimeter (41 or 4.31) to measure the absorbance. Because the color is unstable, each reading must be taken within 25min of the full addition of 3.4 catties. 97912003
point annual reading minus card empty travel no! Yuan 5.., draw these differences carefully to the network containing (each 50% of the case in the current case to prove) the US system curve end,
5.6.2 blank test ride
5.6, 3 when the test road, the certificate of the relative Hui. Note: the empty test sample C m.. standard amount of bullet solution · inducer and I S 611 running test. 5.6.3 special
5.6.3. Recognition test on the cut large amount: 53m.%1CCmm test piece, put the person down in the appropriate container with boiling water to restore the gold in the water practice boiling bucket to ensure the path of the fire? Ti: Euro test, the container on the big rinse. Cool the container to a constant temperature of 1.2 °C. Add molten metal (3.5) to the container. Remove 2 ml of the liquid from the container. Rinse the container with 10 ml of 1:1 condensate and transfer the rinse solution to a volumetric flask. Add 5 ml of the test solution (3.4). Mix the solution after 11% treatment. Add 5 ml of warm granules (3.19). Mix until light and add 5 ml of the solution. 5.6.3.2 Store a portion of the solution in a 4-well absorber (4,1) or spectrophotometer (111-.2). Read the result within 2 hours of adding the solution. Subtract the result from the result of the test. 5.5.2 is used for calibration. Calculate the result as g per 25 μl. 5.6.3.3 If the distance obtained is lower than the calibration value by 10%, replace the specimen and re-measure it with 1.5 times or 2 times the value listed in 6.3.1. 5.6.4 Expression of results: The sensitive surface area of the film on the test specimen shall be expressed in g:m; the hexavalent chromium content measured in accordance with 5.6.3 shall be divided by the total content of the hexavalent chromium. The hexavalent chromium content shall be expressed in g:m. 5.7 Determination of total zinc content in colored zinc oxide film 5.7.1 Preparation of calibration curve: The calibration curve shall be prepared in accordance with 5.6.1. 5.7.2 Blank test
5.G.2 Blank test
5.1.3.1 Cut a 50×12 mm piece from the sample and heat 23 m3 of acid solution (<3.5) to 4°C-53°C in an appropriate incubator without disturbing the sample. Add 135-15% aldehyde to the sample. Dilute the acid solution and oil to about 175% and add about 0.5% persulfate (3.8% and 3% silver sulfate) and then add to a boiling grid at a rate of 30 min. Cool to about 2u ".NUF concentration 3.7 adjust nT1 to 1.1. for 2H Nan a full wave F test oxygen, do not limit the test group to the swim. Repair a 25mm1. Wear a 1cm.-15L water flow container with a capacity of two people, add 3:1. Test solution D:3.4> rise convex: read the addition and subtraction condensation 1> 2m after the timely addition of 2ml phosphate short beat (.10), hope to scale and mix:
5.7.3.2 Transfer part of the liquid to the absorption cell, fill the colorimetric 4.1) or external light photometer (4.》on the absorption change rate measured by the color package is not fixed so to read within 2mm of the test solution element: read the reading from the instrument subtract the concave test reading (see 5.7.2! Use the calibration line: see 5.71) to convert the station result to per liter of road, in meter, 5.7.4 station result expression
fixed formula 5.5 The weight of the unit area of colorless and colored chromium shall be determined by the gravimetric method. The unit mass shall be mgem. 5.9 The adhesion shall be tested by wiping paper (No. 40 Wtm ball paper) or grain size paper. The surface of the test paper shall be 0.00 mm thick. If there is no trace of non-toxic material and no film falling off on the paper after wiping, it can be judged that the adhesion is satisfactory. This test can be quantitative. 5.10 Test for quality evaluation of zinc and chromium surface film GB/T 9791-20D3
Change GB/T1012E through neutral salt spray test, to evaluate the quality of surface acid salt film or rain erosion resistance of chromium salt conversion film, the time of corrosion-free products is not more than 3801988
Table of new values.
: The necessity of scientific identification of quality is mainly due to the lack of direct relationship between the performance and the recovery of the environment in which it is used.
1 After the comparison, the shadow of the alliance can be explained when there is a benefit: for example, wax stock or call enough. The total mouth recall method is designed to test the surface of the sample after the salt conversion treatment. The sample is arranged in a reverse comparison. The steel bar that has not been treated is in a positive state, or the salt conversion treatment is carried out according to the table without a continuous seam. It will react with the lead acetate solution and form a glass in the test concentration of 2~5. Note: The above method causes the comparison environment to be micro-controlled by the two people. Only the workpiece that is subject to the quality control of the workpiece is changed. This method starts with this test. Let: The conversion will not be realized in the test step. The salt conversion or the salt production of the same shape is the same as the above. The stem can only be related to the net output rate! 1. The acidification of the company is the same as the temperature change of the air. The air temperature of the air is the same as the temperature of the air. The air temperature of the air is the same as the temperature of the air. The air temperature of the air is the same as the temperature of the air. The air temperature of the air is the same as the temperature of the air. The air temperature of the air is the same as the temperature of the air. The air temperature of the air is the same as the temperature of the air. The air temperature of the air is the same as the temperature of the air. The air temperature of the air is the same as the temperature of the air. The air temperature of the air is the same as the temperature of the air. The air temperature of the air is the same as the temperature of the air. The air temperature of the air is the same as the temperature of the air. The air temperature of the air is the same as the temperature of the air. The air temperature of the air is the same as the temperature of the air. The air temperature of the air is the same as the temperature of the air. The air temperature of the air is the same as the temperature of the air. The air temperature of the air is the same as the temperature of the air. The air temperature of the air is the same as the temperature of the air. The air temperature of the air is the same as the temperature of the air. The color will be shown in the minutes. Do not consider the same color for a long time, for example, the color of the liquid is formed. In order to compare, the surface of the sample is tested by the same method.
Bixi Wai
5.E Determination of the content of colored zinc ether salt 5.E.1 Preparation of calibration curve
E.6.1.1 In each 95al. volumetric bottle, accurately transfer ml. (i.e. empty liquid, 10ml.: 2uml., 30m!. 13ml of chromium pentoxide solution (3,91 car) is added to each bottle. 1lml of water and 3[. sulfur solution 13.5). Add to one bottle 3-. Test 11.1 Add D to the test room for 2min. Add 2ml of phosphoric acid solution (310) to the mixture and mix. Place each sample in the same container and measure the absorbance on a colorimeter (41 or 4.31). Because the color is not stable, take each reading within 25min of the full addition of GH/T. 97912003
point annual readings minus card empty tour no! Yuan 5.., draw these differences carefully to the network containing (each 50% of the case capital in the present to prove) the US system curve end,
5.6.2 blank test ride
An 5.6, 3 when the test road, permit relatives Hui want. Note: empty its test reached sample C m.. standard amount of bullet problem · inducer and I S 611 Run the test. 5.6.3 Special determination
5.6.3. Test piece cut on the test piece: 53m.%1CCmm test piece, place in a suitable container with boiling water to ensure that the gold diffuses under the boiling water to ensure that the flame is raised? Ti: Euro currency test, rinse the container. Cool the container to a temperature of 1.2al. Jing melt C3.5), wet combination: transfer the contents of the wearer to a container T21ml. guest or bottle: rinse the wearer with 10ml1:ml condensing water and pour the rinse liquid into a volumetric bottle, add 5mL test solution D (3.4) sheep mix: add 5m. warm solution (3.19) after 11%uiL treatment, and mix to a light degree and mix. 5.6.3.2 Store a portion of the rate of ten absorption change pool, inch 4 meter (4,1) or spectrophotometer 11 1-.2 The yield of the product is calculated according to the volume. Because the color is not stable, the test fluid is added within 2 hours of the reading 5.4>: subtract the test value from the instrument 5.5.2 to calculate the calibration value <see 5,1,1> and calculate the result as 25g less per 25unI. 5.6, 3.3 If the obtained value is lower than the calibration value by 10%, the test piece shall be replaced, and the 1 listed in 6.3.1 shall be 5.6.4 Expression of results: Determine the sensitive surface area of the film on the sample, expressed in g:m; divide the hexavalent chromium content measured in accordance with 5.6.3 by the total content of the hexavalent chromium. The content should be expressed in g:m. 5.7 Determination of total zinc content in colored zinc salt film 5.7.1 Calibration curve Preparation and calibration curve Preparation and calibration curve according to 5.6.1. 5.7.2 Blank test Perform blank test in accordance with 5.G.2. 5.1.3.1 Cut a large piece of 50a×12mm from the sample and heat it at 23m3 (<3.5) to 4c℃ with an appropriate instrument with a flow rate of acid solution below 135-15℃ without disturbing the surface. Report the test order, wash above the discarder: dilute the acid and oil mixture to about 175, add about 0.5% persulfate (3% and 3.8% acid silver) and then add boiling water, increase by 30 minutes. Cool about 2 hours. Adjust the concentration of NUF to 3.7 to 1.1. For the 2H test, do not limit the test group to the test. Repair the 25mm1. wear bottle with 1cm.-15L water flow container with two people capacity, add 3:1. Test solution D: 3.4> rise convex: read the addition and subtraction condensation 1> 2 minutes after the timely addition of 2ml fumed salt short beat (.10), hope to the scale and mix: ||tt| |5.7.3.2 Transfer part of the liquid to the absorption cell and fill it with a colorimetric (4.1) or external light photometer (4.1). The absorption rate is measured by adding the test solution within 2 mm of the instrument. The reading is as follows: subtract the test reading from the instrument reading (see 5.7.2! Use the calibration line: see 5.71) and convert the result to the amount per liter. 5.7.4 Result Expression
Formula 5.5 The weight of the unit area of colorless and colored chromium shall be determined by the gravimetric method. The unit mass shall be mgem. 5.9 The adhesion shall be tested by wiping paper (No. 40 Wtm ball paper) or grain size paper. The surface of the test paper shall be 0.00 mm thick. If there is no trace of non-toxic material and no film falling off on the paper after wiping, it can be judged that the adhesion is satisfactory. This test can be quantitative. 5.10 Test for quality evaluation of zinc and chromium surface film GB/T 9791-20D3
Change GB/T1012E through neutral salt spray test, to evaluate the quality of surface acid salt film or rain erosion resistance of chromium salt conversion film, the time of corrosion-free products is not more than 3801988
Table of new values.
: The necessity of scientific identification of quality is mainly due to the lack of direct relationship between the performance and the recovery of the environment in which it is used.
1 After the comparison, the shadow of the alliance can be explained when there is a benefit: for example, wax stock or call enough. The total mouth recall method is designed to test the surface of the sample after the salt conversion treatment. The sample is arranged in a reverse comparison. The steel bar that has not been treated is in a positive state, or the salt conversion treatment is carried out according to the table without a continuous seam. It will react with the lead acetate solution and form a glass in the test concentration of 2~5. Note: The above method causes the comparison environment to be micro-controlled by the two people. Only the workpiece that is subject to the quality control of the workpiece is changed. This method starts with this test. Let: The conversion will not be realized in the test step. The salt conversion or the salt production of the same shape is the same as the above. The stem can only be related to the net output rate! 1. The acidification of the company is the same as the temperature change of the air. The air temperature of the air is the same as the temperature of the air. The air temperature of the air is the same as the temperature of the air. The air temperature of the air is the same as the temperature of the air. The air temperature of the air is the same as the temperature of the air. The air temperature of the air is the same as the temperature of the air. The air temperature of the air is the same as the temperature of the air. The air temperature of the air is the same as the temperature of the air. The air temperature of the air is the same as the temperature of the air. The air temperature of the air is the same as the temperature of the air. The air temperature of the air is the same as the temperature of the air. The air temperature of the air is the same as the temperature of the air. The air temperature of the air is the same as the temperature of the air. The air temperature of the air is the same as the temperature of the air. The air temperature of the air is the same as the temperature of the air. The air temperature of the air is the same as the temperature of the air. The air temperature of the air is the same as the temperature of the air. The air temperature of the air is the same as the temperature of the air. The air temperature of the air is the same as the temperature of the air. The color will be shown in the minutes. Do not consider the same color for a long time, for example, the color of the liquid is formed. In order to compare, the surface of the sample is tested by the same method.
Bixi Wai
5.E Determination of the content of colored zinc ether salt 5.E.1 Preparation of calibration curve
E.6.1.1 In each 95al. volumetric bottle, accurately transfer ml. (i.e. empty liquid, 10ml.: 2uml., 30m!. 13ml of chromium pentoxide solution (3,91 car) is added to each bottle. 1lml of water and 3[. sulfur solution 13.5). Add to one bottle 3-. Test 11.1 Add D to the test room for 2min. Add 2ml of phosphoric acid solution (310) to the mixture and mix. Place each sample in the same container and measure the absorbance on a colorimeter (41 or 4.31). Because the color is not stable, take each reading within 25min of the full addition of GH/T. 97912003
point annual readings minus card empty tour no! Yuan 5.., draw these differences carefully to the network containing (each 50% of the case capital in the present to prove) the US system curve end,
5.6.2 blank test ride
An 5.6, 3 when the test road, permit relatives Hui want. Note: empty its test reached sample C m.. standard amount of bullet problem · inducer and I S 611 Run the test. 5.6.3 Special determination
5.6.3. Test piece cut on the test piece: 53m.%1CCmm test piece, place in a suitable container with boiling water to ensure that the gold diffuses under the boiling water to ensure that the flame is raised? Ti: Euro currency test, rinse the container. Cool the container to a temperature of 1.2al. Jing melt C3.5), wet combination: transfer the contents of the wearer to a container T21ml. guest or bottle: rinse the wearer with 10ml1:ml condensing water and pour the rinse liquid into a volumetric bottle, add 5mL test solution D (3.4) sheep mix: add 5m. warm solution (3.19) after 11%uiL treatment, and mix to a light degree and mix. 5.6.3.2 Store a portion of the rate of ten absorption change pool, inch 4 meter (4,1) or spectrophotometer 11 1-.2 The yield of the product is calculated according to the volume. Because the color is not stable, the test fluid is added within 2 hours of the reading 5.4>: subtract the test value from the instrument 5.5.2 to calculate the calibration value <see 5,1,1> and calculate the result as 25g less per 25unI. 5.6, 3.3 If the obtained value is lower than the calibration value by 10%, the test piece shall be replaced, and the 1 listed in 6.3.1 shall be 5.6.4 Expression of results: Determine the sensitive surface area of the film on the sample, expressed in g:m; divide the hexavalent chromium content measured in accordance with 5.6.3 by the total content of the hexavalent chromium. The content should be expressed in g:m. 5.7 Determination of total zinc content in colored zinc salt film 5.7.1 Calibration curve Preparation and calibration curve Preparation and calibration curve according to 5.6.1. 5.7.2 Blank test Perform blank test in accordance with 5.G.2. 5.1.3.1 Cut a large piece of 50a×12mm from the sample and heat it at 23m3 (<3.5) to 4c℃ with an appropriate instrument with a flow rate of acid solution below 135-15℃ without disturbing the surface. Report the test order, wash above the discarder: dilute the acid and oil mixture to about 175, add about 0.5% persulfate (3% and 3.8% acid silver) and then add boiling water, increase by 30 minutes. Cool about 2 hours. Adjust the concentration of NUF to 3.7 to 1.1. For the 2H test, do not limit the test group to the test. Repair the 25mm1. wear bottle with 1cm.-15L water flow container with two people capacity, add 3:1. Test solution D: 3.4> rise convex: read the addition and subtraction condensation 1> 2 minutes after the timely addition of 2ml fumed salt short beat (.10), hope to the scale and mix: ||tt| |5.7.3.2 Transfer part of the liquid to the absorption cell and fill it with a colorimetric (4.1) or external light photometer (4.1). The absorption rate is measured by adding the test solution within 2 mm of the instrument. The reading is as follows: subtract the test reading from the instrument reading (see 5.7.2! Use the calibration line: see 5.71) and convert the result to the amount per liter. 5.7.4 Result Expression
Formula 5.5 The weight of the unit area of colorless and colored chromium shall be determined by the gravimetric method. The unit mass shall be mgem. 5.9 The adhesion shall be tested by wiping paper (No. 40 Wtm ball paper) or grain size paper. The surface of the test paper shall be 0.00 mm thick. If there is no trace of non-toxic material and no film falling off on the paper after wiping, it can be judged that the adhesion is satisfactory. This test can be quantitative. 5.10 Test for quality evaluation of zinc and chromium surface film GB/T 9791-20D3
Change GB/T1012E through neutral salt spray test, to evaluate the quality of surface acid salt film or rain erosion resistance of chromium salt conversion film, the time of corrosion-free products is not more than 3801988
Table of new values.
: The necessity of scientific identification of quality is mainly due to the lack of direct relationship between the performance and the recovery of the environment in which it is used.Sulfur finishing liquid 13.5). Add 3-10ml phosphoric acid to a bottle and mix for 11.1 minutes. Add 2ml phosphoric acid solution (310) to the mixture and mix. Place the mixture in the white and absorb the sample. Measure the absorbance on a colorimeter (41 or 4.31). Because the color is unstable, take each reading within 25 minutes of the full reading. Draw the difference between the two (50% of the sample is used to verify the sample). 5.6.2 Blank test. Perform the test on 5.6.3. Note: Blank test sample C m..Standard quantity reduction and quantity reduction. Add the inducing agent and run the test in S 611. 5.6.3 Special requirements
5.6.3. Test on the cut section: 53m.%1CCmm test piece, place it in a suitable container with boiling water, let it diffuse under the boiling water, ensure that the path is raised? Ti: Euro currency test, rinse the container. Cool the container to its contents to a temperature of 2al. Jing melt C3.5), produce moisture: transfer the inside of the device T21ml. guest or bottle: rinse the instrument with 10ml1:ml condensate and read it twice and put the rinse liquid into the volumetric bottle, add 5mL test solution D (3.4) and mix: add 5mL warm solution (3.19) after 11% treatment, and mix it to the concentration. 5.6.3.2 Store part of the concentration in the absorption pool, and read the result within 2 hours of adding the solution (4,1) or spectrophotometer 111-.2. Because the color is unstable, it is forbidden to add the solution 5.4>. Read the result within 2 hours: subtract the test value from the result of the instrument 5.5.2. The result is calculated as less than 25μl of the drop. 5.6.3.3 If the distance obtained is lower than the calibration value by 10%, replace the specimen and re-measure it with 1.5 times or 2 times the value listed in 6.3.1. 5.6.4 Expression of results: The sensitive surface area of the film on the test specimen shall be expressed in g:m; the hexavalent chromium content measured in accordance with 5.6.3 shall be divided by the total content of the hexavalent chromium. The hexavalent chromium content shall be expressed in g:m. 5.7 Determination of total zinc content in colored zinc oxide film 5.7.1 Preparation of calibration curve: The calibration curve shall be prepared in accordance with 5.6.1. 5.7.2 Blank test
5.G.2 Blank test
5.1.3.1 Cut a 50×12 mm piece from the sample and heat 23 m3 of acid solution (<3.5) to 4°C-53°C in an appropriate incubator without disturbing the sample. Add 135-15% aldehyde to the sample. Dilute the acid solution and oil to about 175% and add about 0.5% persulfate (3.8% and 3% silver sulfate) and then add to a boiling grid at a rate of 30 min. Cool to about 2u ".NUF concentration 3.7 adjust nT1 to 1.1. for 2H Nan a full wave F test oxygen, do not limit the test group to the swim. Repair a 25mm1. Wear a 1cm.-15L water flow container with a capacity of two people, add 3:1. Test solution D:3.4> rise convex: read the addition and subtraction condensation 1> 2m after the timely addition of 2ml phosphate short beat (.10), hope to scale and mix:
5.7.3.2 Transfer part of the liquid to the absorption cell, fill the colorimetric 4.1) or external light photometer (4.》on the absorption change rate measured by the color package is not fixed so to read within 2mm of the test solution element: read the reading from the instrument subtract the concave test reading (see 5.7.2! Use the calibration line: see 5.71) to convert the station result to per liter of road, in meter, 5.7.4 station result expression
fixed formula 5.5 The weight of the unit area of colorless and colored chromium shall be determined by the gravimetric method. The unit mass shall be mgem. 5.9 The adhesion shall be tested by wiping paper (No. 40 Wtm ball paper) or grain size paper. The surface of the test paper shall be 0.00 mm thick. If there is no trace of non-toxic material and no film falling off on the paper after wiping, it can be judged that the adhesion is satisfactory. This test can be quantitative. 5.10 Test for quality evaluation of zinc and chromium surface film GB/T 9791-20D3
Change GB/T1012E through neutral salt spray test, to evaluate the quality of surface acid salt film or rain erosion resistance of chromium salt conversion film, the time of corrosion-free products is not more than 3801988
Table of new values.
: The necessity of scientific identification of quality is mainly due to the lack of direct relationship between the performance and the recovery of the environment in which it is used.Sulfur finishing liquid 13.5). Add 3-10ml phosphoric acid to a bottle and mix for 11.1 minutes. Add 2ml phosphoric acid solution (310) to the mixture and mix. Place the mixture in the white and absorb the sample. Measure the absorbance on a colorimeter (41 or 4.31). Because the color is unstable, take each reading within 25 minutes of the full reading. Draw the difference between the two (50% of the sample is used to verify the sample). 5.6.2 Blank test. Perform the test on 5.6.3. Note: Blank test sample C m..Standard quantity reduction and quantity reduction. Add the inducing agent and run the test in S 611. 5.6.3 Special requirements
5.6.3. Test on the cut section: 53m.%1CCmm test piece, place it in a suitable container with boiling water, let it diffuse under the boiling water, ensure that the path is raised? Ti: Euro currency test, rinse the container. Cool the container to its contents to a temperature of 2al. Jing melt C3.5), produce moisture: transfer the inside of the device T21ml. guest or bottle: rinse the instrument with 10ml1:ml condensate and read it twice and put the rinse liquid into the volumetric bottle, add 5mL test solution D (3.4) and mix: add 5mL warm solution (3.19) after 11% treatment, and mix it to the concentration. 5.6.3.2 Store part of the concentration in the absorption pool, and read the result within 2 hours of adding the solution (4,1) or spectrophotometer 111-.2. Because the color is unstable, it is forbidden to add the solution 5.4>. Read the result within 2 hours: subtract the test value from the result of the instrument 5.5.2. The result is calculated as less than 25μl of the drop. 5.6.3.3 If the distance obtained is lower than the calibration value by 10%, replace the specimen and re-measure it with 1.5 times or 2 times the value listed in 6.3.1. 5.6.4 Expression of results: The sensitive surface area of the film on the test specimen shall be expressed in g:m; the hexavalent chromium content measured in accordance with 5.6.3 shall be divided by the total content of the hexavalent chromium. The hexavalent chromium content shall be expressed in g:m. 5.7 Determination of total zinc content in colored zinc oxide film 5.7.1 Preparation of calibration curve: The calibration curve shall be prepared in accordance with 5.6.1. 5.7.2 Blank test
5.G.2 Blank test
5.1.3.1 Cut a 50×12 mm piece from the sample and heat 23 m3 of acid solution (<3.5) to 4°C-53°C in an appropriate incubator without disturbing the sample. Add 135-15% aldehyde to the sample. Dilute the acid solution and oil to about 175% and add about 0.5% persulfate (3.8% and 3% silver sulfate) and then add to a boiling grid at a rate of 30 min. Cool to about 2u ".NUF concentration 3.7 adjust nT1 to 1.1. for 2H Nan a full wave F test oxygen, do not limit the test group to the swim. Repair a 25mm1. Wear a 1cm.-15L water flow container with a capacity of two people, add 3:1. Test solution D:3.4> rise convex: read the addition and subtraction condensation 1> 2m after the timely addition of 2ml phosphate short beat (.10), hope to scale and mix:
5.7.3.2 Transfer part of the liquid to the absorption cell, fill the colorimetric 4.1) or external light photometer (4.》on the absorption change rate measured by the color package is not fixed so to read within 2mm of the test solution element: read the reading from the instrument subtract the concave test reading (see 5.7.2! Use the calibration line: see 5.71) to convert the station result to per liter of road, in meter, 5.7.4 station result expression
fixed formula 5.5 The weight of the unit area of colorless and colored chromium shall be determined by the gravimetric method. The unit mass shall be mgem. 5.9 The adhesion shall be tested by wiping paper (No. 40 Wtm ball paper) or grain size paper. The surface of the test paper shall be 0.00 mm thick. If there is no trace of non-toxic material and no film falling off on the paper after wiping, it can be judged that the adhesion is satisfactory. This test can be quantitative. 5.10 Test for quality evaluation of zinc and chromium surface film GB/T 9791-20D3
Change GB/T1012E through neutral salt spray test, to evaluate the quality of surface acid salt film or rain erosion resistance of chromium salt conversion film, the time of corrosion-free products is not more than 3801988
Table of new values.
: The necessity of scientific identification of quality is mainly due to the lack of direct relationship between the performance and the recovery of the environment in which it is used.The above measured absorption rate is not fixed, so it should be read within 2mm of the test liquid. Subtract the test reading from the instrument reading (see 5.7.2! Use the calibration line: see 5.71) to convert the station result into per liter quantity, and calculate it in units of 5.7.4 Station results are expressed in
standard format. The total unit of the above half-share is shown in the country of origin. 2 The measured content is divided by this total content. The total content should be expressed in n,
5.5 The mass per unit area of colorless and colored chromium determined by weight should be measured in units of 9? Quality, single surface quality should be expressed as mgem5.9 Use the wiping method to test the adhesion
piece of paper (40# Wtm ball paper) or the original grain model. The surface of the test paper should be replaced with 0 model. The adhesion of the test salt model should be tested. After use, there should be a larger limit of non-contamination and no film peeling on the paper. The surface of the film should be saturated with traces of non-contamination. It can be judged that the adhesion is satisfactory. This test can be quantitative.
5.10 Quality evaluation test of zinc and zinc salt film on the surface GB/T 9791-20D3
Change GB/T1012E through neutral salt spray test, to evaluate the quality of surface acid salt film or rain erosion resistance of chromium salt conversion film, the time of corrosion-free products is not more than 3801988
Table of new values.
: The necessity of scientific identification of quality is mainly due to the lack of direct relationship between the performance and the recovery of the environment in which it is used.The above measured absorption rate is not fixed, so it should be read within 2mm of the test liquid. Subtract the test reading from the instrument reading (see 5.7.2! Use the calibration line: see 5.71) to convert the station result into per liter quantity, and calculate it in units of 5.7.4 Station results are expressed in
standard format. The total unit of the above half-share is shown in the country of origin. 2 The measured content is divided by this total content. The total content should be expressed in n,
5.5 The mass per unit area of colorless and colored chromium determined by weight should be measured in units of 9? Quality, single surface quality should be expressed as mgem5.9 Use the wiping method to test the adhesion
piece of paper (40# Wtm ball paper) or the original grain model. The surface of the test paper should be replaced with 0 model. The adhesion of the test salt model should be tested. After use, there should be a larger limit of non-contamination and no film peeling on the paper. The surface of the film should be saturated with traces of non-contamination. It can be judged that the adhesion is satisfactory. This test can be quantitative.
5.10 Quality evaluation test of zinc and zinc salt film on the surface GB/T 9791-20D3
Change GB/T1012E through neutral salt spray test, to evaluate the quality of surface acid salt film or rain erosion resistance of chromium salt conversion film, the time of corrosion-free products is not more than 3801988
Table of new values.
: The necessity of scientific identification of quality is mainly due to the lack of direct relationship between the performance and the recovery of the environment in which it is used.
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