Some standard content:
ICS25.060.99
J50
JB
Machinery Industry Standard of the People's Republic of China
JB/T4323.2-1999
Water-based metal cleaning agent|| tt||Test methods
Test methods of water-based metal cleanser1999-05-20 released
National Machinery Industry Bureau
Released
Implemented on 2000-01-01| |tt||JB/T4323.21999
This standard is a revision of JB4322-86
Foreword
"Test Methods for Water-based Metal Cleaners". During the revision, in addition to editorial modifications to the original standard and correction of some printing errors, its main technical content has also been changed: 1. Some new content has been added to the relevant chapters. 2. "30\ Machinery Oil" is changed to "N46HL Hydraulic Oil (General Machine Tool Industrial Oil). 3. "20* Machinery Oil" is changed to "N32HL Hydraulic Oil (General Machine Tool Industry Oil). 4. "40 degrees "Preparation of human T. hard water" was changed to "Preparation of human T. hard water in 40 German countries (713×10-°)". This standard will replace JB4322-86 from the date of implementation. This standard is proposed and managed by Guangzhou Machine Tool Research Institute. The unit responsible for drafting this standard: Guangzhou Machine Tool Research Institute. The main drafters of this standard: Li Maosheng, Tang Lianhua 1 Scope
People's Republic of China Machinery Industry Standards
Test Methods
Water-based Metals. Cleaning agents
Testmethods of water-based metal cleaner This standard specifies the test methods for water-based metal cleaning agents JB/T4323.2-1999
Replaces JB4322-86
This standard is applicable to inspection of main components. Physical and chemical properties of water-based metal cleaning agents composed of surfactants and various additives for cleaning oily metal materials and parts. Used for factory inspection, scientific research and testing. 2 Reference standards
Contained in the following standards. Provisions, by reference in this standard, constitute provisions of this standard. The editions indicated are valid at the time this standard is published. All standards are subject to revision and parties using this standard should explore the possibility of using the latest edition of the following standards. . JB/T4323.1-1999 Water-based metal cleaning agent SH/T 02181992
Preparation method of anti-rust grease test specimen
3 Preparation of sampling, test solution and test piece
This method specifies the preparation of water-based metal cleaning agent samples, test solutions, and metal test pieces. 3.1 Sampling and sample preparation
3.1.1 Sampling
3.1.1.1 Liquid sample: Shake the sample thoroughly in the original packaging container and then take a sample (not less than 500 mL). 3.1.1.2 Solid sample: Take samples from 3 different parts (a total amount of not less than 500g). 3.1.1.3 Paste sample: Remove the substance first. surface layer, and then take samples from 3 different parts (the total amount is not less than 500g) 3.1.2 Preparation of cleaning solution
The test solution used in this method shall be distilled water or deionized water (3±0.1)%. (mass ratio), if there are special needs, prepare according to the concentration specified by the product
3.2 Preparation of metal test pieces
3.2.1 Test piece material
HT200 medicinal iron can be used. , 45 steel, H62 brass, LY12 (BCZ) hard aluminum, and other metals or coatings agreed upon by both parties of production and use:
3.2.2 Test piece specifications
3.2.2.1 Corrosion test Use the test piece, see Figure 13.2.2.2 Use the test piece for the anti-rust test, see Figure 2 or Figure 3. 3.2.2.3 Use the test piece for the oil washing rate test, see Figure 4 Approved by the State Machinery Industry Bureau on 1999-05-20 2000- 01-01Implementation
JB/T 4323.21999
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Strengthening
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3.2.3 try Polishing and cleaning of the test piece
3.2.3.1 Polishing of the test piece
JB/T4323.2—1999
First use 180\ sandpaper (cloth) to polish the four sides, corners and The hole is polished and bright. Then, use 200* sandpaper for the ferrous metal test piece and 240* sandpaper for the non-ferrous metal test piece. The polishing texture is in the direction shown by the arrow in the figure. The surface roughness of the polished test piece should reach R0.16~0.63 and be stored in Wait in the dryer for washing. 3.2.3.2 Cleaning of test pieces
Use tweezers to pick up absorbent cotton and scrub the polished test pieces in solvent gasoline → solvent gasoline → absolute ethanol → hot absolute ethanol (50~609℃). Blow dry with hot air and cool in a dry media container until use. For test pieces used for anti-rust and corrosion prevention, the waiting time should not exceed 16 hours starting from the time the test piece is polished, otherwise it should be reprocessed. 4 Appearance inspection test method
This method is used to check the appearance of water-based metal cleaning agents. 4.1 Instrument: its stopper measuring cylinder, 100mL.
4.2 Test steps:
4.2.1 Sampling of the cleaning agent shall be carried out according to the provisions of 3.1. 4.2.2 When checking the body cleaning agent, put 100mL of cleaning agent stock solution into a 100mL stopper measuring cylinder. After leaving it at 15~35°C for 24 hours, check the appearance of the solution.
4.2.3 Paste or solid cleaning agents should check the appearance of the samples taken. 4.3 Result evaluation
4.3.1 Check whether the liquid cleaning agent solution is uniform and whether there is stratification and precipitation. 4.3.2 Check whether the paste cleaning agent is uniform and whether there are hard lumps and obvious separation. 4.3.3 Check whether the powdered cleaning agent is uniform and loose, and whether there are any hard clumps. 5pH value test method
5.1 Main materials
Wide range of test paper pH1~14, pH meter.
5.2 Test steps:
5.2.1 The solution used for the test is prepared according to the provisions of 3.1.2. 5.2.2 Inject a piece of pH test paper into the test solution at 15-35°C, take it out after 0.5 seconds, and compare it with the standard color plate to get the pH value. Or test the pH value directly with a pH meter.
5.2.3 During the arbitration test, use a pH meter to test, accurate to 0.1 pH unit, and the solution temperature is room temperature 25°C ± 2°C. 5.3 Result evaluation
shall be evaluated according to the technical conditions.
6 Cleaning ability test method (gravimetric method)
This method is suitable for the evaluation of the ability of water-based cleaning agents to clean oil stains on metal surfaces. 6.1 Main instruments and materials
Swing washing device: Swing washing frequency (30±1) times/min (one round trip), swing washing distance 50mm±2mm, and can hang 3 test JB/T4323 at the same time. 2-1999
piece and has 6 500mL swing washing tanks, equipped with test liquid constant temperature device; oil immersion lifter: lifting speed 100mm/min (see SH/T0218); metal test piece: No. 45 steel ( 3.2.2.3); Constant temperature drying oven;
Analytical balance;
Metal test piece holder;
Human oil pollution, N46HL hydraulic oil (oil for general machine tool industry), both supply and demand parties Agreed oil stain. 6.2 Test preparation
6.2.1 Test piece specifications, grinding and cleaning shall be carried out according to the provisions of 3.2. 6.2.2 The preparation of cleaning agent test solution shall be carried out according to the provisions of 3.1.2. 6.2.3 Preparation of artificial oil (parts by weight) N32HL hydraulic oil (oil for general machine tool industry) 2 parts industrial white petroleum jelly
barium petroleum sulfonate
1 part
1 part
Mix the above components, dissolve at about 120℃ and stir evenly. 6.2.4 Pass the test according to methods 6.3.1 and 6.3.2, and pre-select the oil-free temperature of artificial oil (about 80°C) so that the amount of oil applied on the test piece is 110~120mg. N46HL hydraulic oil (oil for general machine tool industry) is dip-coated at room temperature, and the amount of oil is 50~60mg. 6.3 Test steps
6.3.1 Hang the three polished and cleaned test pieces with hooks respectively, and weigh them on the balance to the nearest 0.1mg. This weight is represented by P,. 6.3.2 Immerse the weighed test piece into the oil that has been preheated to the oil-free temperature [N46HL hydraulic oil (general machine tool industry oil) for more than 5 minutes at room temperature, and wait until the test piece is After the oil temperature is the same, use a lifter to lift out the test piece, hang it on the test piece rack and drain for 20 minutes. Scrape off the oil droplets accumulated at the bottom of the test piece, and weigh it together with the original hook. This weight is represented by P,. PP is the amount of oil stain on the test piece. 6.3.3. Fix the oil-immersed and weighed test pieces on the swing cleaner with the original hook, so that the surface of the test piece is perpendicular to the swing direction, and pour into 3 test pieces each containing 500mL, 65℃±2℃ (normal temperature cleaning agent is 30 ℃±2℃), immediately record the time in the washing tank of the test solution, wait for 3 minutes, wash for 3 minutes, take out the test piece, and then put it in 500mL of 65℃±2℃ (normal temperature disinfectant is 30℃±2℃) Wash 10 times in distilled water, take out the test piece and dry it immediately in an oven at 70°C ± 2°C for 30 to 40 minutes. Take it out and cool it to room temperature before weighing. This weight is represented by P. PP, is the weight of oil stains cleaned off.
6.4 Result Evaluation
The cleaning ability is expressed by the oil washing rate h and calculated according to formula (1): h=B-x100%.
Pp
(1)
First find the h values ??of the three samples, and then find their arithmetic mean h. Compared with the average value, if the error does not exceed ±2%, the value is the effective value, and the average value of the effective value is the final test result. If there are less than 2 valid values, the test should be repeated. 7 Cleaning ability test method (fluorescence method)
This method is suitable for the evaluation of the amount of oil remaining on the metal surface after the water-based cleaning agent cleans the oil stains on the metal surface. 7.1 Main instruments and materials
Fluorescence photometer or fluorescence spectrophotometer for oil measurement; 4
Pendulum washer: See 6.1:
Glass ground quantitative sampler (2.5L) ; Metal test piece: No. 45 steel (3.2.2.3); Volumetric flask: 100mL, 25mL;
Pipette: 10mL, 5mL;
Cyclohexane: analytical grade, reserved after redistillation Use: artificial oil pollution: see 6.2:
Analytical balance: sensitivity 0.1mg.
7.2 Test preparation
JB/T4323.21999
7.2.1 The specifications and polishing of the test piece shall be carried out according to the provisions of 3.2. Use a forger to pick up a small piece of absorbent cotton, dip it in a little cyclohexane, scrub the polished test piece twice, blow dry with cold air with a hair dryer, and place it in a desiccator for later use. 7.2.2 The preparation of cleaning agent test solution shall be carried out according to the provisions of 3.1.2. 7.2.3 The oil stain dipping amount test shall be carried out according to the method of 6.2.4. 7.2.4 Preparation of oil pollution standard solution Www.bzxZ.net
Weigh 0.1000g of oil pollution in a small beaker, dissolve it with a small amount of cyclohexane, quantitatively transfer it to a 100mL volumetric flask, and dilute to the mark. This solution contains 1mg of oil per ml. Use a pipette to absorb 0.5, 1, 2, 4, 6.8, and 10 mL of the above solutions: transfer them to seven 25 mL volumetric flasks respectively, and dilute to the mark with cyclohexane to obtain the oil content of 0.5, 1, 2, 4, 6, 8, 10mg/25mL standard series solutions. 7.2.5 Drawing of standard curve
Place the above series of standard solutions in the colorimetric III of the fluorescence photometer, use pure cyclohexane as the blank, and measure the relative fluorescence intensity at the wavelength of 460nm respectively. Take the oil pollution concentration as The abscissa is the corresponding fluorescence relative intensity and the ordinate is the corresponding standard curve. 7.3 Test steps
Immerse three polished and cleaned test pieces into artificial oil that has been preheated to the immersion temperature [N46HL hydraulic oil (oil for general machine tool industry) is immersed in oil under room oil] , use a lifter to lift the test piece, hang it on the test piece holder and let it drip freely for several minutes, and remove the oil droplets accumulated at the bottom of the test piece. Use a hook to fix it on the washing device. The surface of the test piece is perpendicular to the direction of washing. Place it into three washing tanks containing 65℃±2℃ test solution, immerse it statically for 3 minutes, and wash it for 3 minutes. Take out the test piece and wash it 10 times in 500mL distilled water at 65℃±2℃. For normal temperature cleaning agents, the temperatures of the test solution and distilled water during washing should be 30C±2℃. Take out the test piece, blow it dry with electric hot air, put it into a suitable crystallization resistor, and add 25mL (if the amount of residual oil is too large, add 50mL or 100mL) with a quantitative injector. Cyclohexane: Move it carefully several times, and turn it over. Turn the other side of the test piece upward and move it carefully several times to dissolve all the residual oil on the test piece. Transfer the obtained solution into colorimetric III, place it in a fluorometer preheated for 15 minutes, use the solvent cyclohexane as the blank, and measure the fluorescence relative intensity F value at a wavelength of 460 nm.
7.4 Result evaluation
7.4.1 Compare the standard curve to find the oil content C (mg/25mL) corresponding to the F value. 7.4.2 The test results are expressed in residual oil content R (mg). Calculate according to formula (2): R=
25
where: V is the volume of cyclohexane used to dissolve the residual oil in the test piece, mL. (2)
First find the residual oil content R, of the three test pieces, and then find their arithmetic mean R. - The R of general cleaning agents should not differ from the R value JB/T4323.2-1999
if it exceeds ±1 mg, the effective value is considered. The R of high-efficiency cleaning agents should not differ from the R value by more than ±0.3 mg. The average of the effective values ??is the final test result. If there are less than 2 valid values, the test needs to be repeated. 8 Anti-rust test method (single-piece rust resistance, laminated rust resistance) This method is used to test the anti-rust performance of aqueous solutions of water-based metal cleaning agents on metals. 8.1 Main instruments and materials
Electric heating drying oven: Temperature control accuracy ±2°C Humidity tank: Φ300mm glass drying device, inject 800~1000mL distilled water at the bottom: Test piece: HT200 gray cast iron, 45 steel, H62 yellow Copper, LY12 (BCz) hard aluminum Φ35mm × 20mm or 50mm × 50mm × (3~5) mm:
Special pencil: pencil for glass and ceramics; ruler: millimeter scale organic glass or steel ruler. 8.2 Test preparation
8.2.1 Preparation of test pieces shall be carried out according to the provisions of 3.2, and the ruler shall be wiped clean with ethanol. 8.2.2 Use a ruler and a special pencil to draw more than three 10mm × 10mm squares on the test piece (see Figure 5 and Figure 6). For single chip testing. 8.2.3 The preparation of cleaning agent solution shall be carried out according to the provisions of 3.1.2. ot
01
01
Figure 5
8.3 Monolithic anti-rust test steps
Figure 6
8.3.1 Use Φ3- Use a Φ4mm round-headed Bore rod to carefully take the test solution and accurately drop it into 3 grids, 1 drop per grid. When first dropped, the diameter of each wave is about 4-5mm.
8.3.2 Place the test piece on the partition board of the humidification tank, cover it and place it at a constant temperature of 35℃±2℃. 8.4 Test steps for laminated rust resistance
8.4.1 Place the prepared test piece flat on the partition of the humidification tank, with the polished side of the test piece facing up, dip the tip of the glass rod into the test solution, and apply it on the On the test piece, use another test piece to overlap it with the polished side. The two test pieces are separated by a layer of test liquid film to prevent the test piece from tilting and sliding apart. 8.4.2 Cover the humidification tank and place it at a constant temperature of 35℃±2℃. 8.5 Result evaluation
8.5.1 Inspection of single anti-rust test piece
6
JB/T4323.2—1999
After the test period expires, take out the test piece for observation , if the blank area is rusty, the test is deemed valid. Then check the area under the drops for rust. If there is no corrosion at all 3 points, the test fluid is deemed to be qualified; if 1 or more of the 3 points are corroded, the test should be repeated. If there is still 1 or more points of rust in the re-inspection results, the test solution will be deemed unqualified. The arbitration test shall be carried out in parallel, and if all 6 points are not rusted, the test shall be deemed to be qualified. 8.5.2 Inspection of the rust resistance of the laminated sheets
After the test period, open the laminated sheets, use absorbent cotton dipped in ethanol to remove the test solution, and observe the condition of the two selected surfaces within 3mm from the edge of the test piece. There is no rust or obvious discoloration. qualified.
9 Corrosion test method
This method is to immerse the metal test piece completely in a water-based metal cleaning agent solution at a certain temperature, and evaluate the cleaning agent based on the weight loss of the metal test piece and the change in surface color. Corrosive properties to metals. 9.1 Main instruments and materials
Analytical balance;
Constant temperature water bath or constant temperature drying oven:
Metal test piece: see 3.2.2.3;
Wide-mouth bottle: 500mL:
Nylon yarn: Φ0.2~Φ0.5mm.
9.2 Test preparation
9.2.1 The specifications, polishing and cleaning of the test piece shall be carried out in accordance with the provisions of 3.2. 9.2.2 The preparation of the test solution shall be carried out according to the provisions of 3.1.2. 9.3 Test steps
9.3.1 Weigh three pieces of the same kind of test pieces on an analytical balance to obtain P, (accurate to 0.1mg). Then tie them firmly with nylon wire and hang them in a 500mL wide-mouth bottle , the test pieces must not come into contact with each other. 9.3.2 Preheat the test solution to 70℃±2℃ (40℃±2℃ for warm cleaning agent) and pour it into the wide-mouth bottle. Make the test solution about 10mm higher than the top of the test piece, then cover it and place it. Place at a constant temperature of 70℃±2℃ (normal temperature cleaning agent is 40℃±2℃). 9.3.3. After the test period (2h for non-ferrous metals at 70℃±2℃, 4h for ferrous metals: 4h for non-ferrous metals at 40℃±2℃, 8h for ferrous metals), take out the test pieces and rinse them with distilled water before using dry water. Wash with ethanol twice, blow dry with hot air immediately, compare the appearance with the newly polished and cleaned test piece, remove the nylon wire and weigh again P2. 9.4 Result Evaluation
9.4.1 Calculate the weight change according to formula (3) :gP,-P,}-
9.4.2 Evaluate the discoloration level according to Table 1.
(3)
9.4.3 According to the technical conditions, the evaluation is based on weight loss (or weight gain) and appearance. If 2 of the 3 test pieces are unqualified, the test result is unqualified; 1 piece is unqualified. For those who fail, the test will be re-tested. If there is still one unqualified piece after the repeated test, the test result is unqualified.
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