This part of GB/T18570 specifies the on-site titration method for the determination of water-soluble chlorides. This method is mainly applicable to the assessment of surface impurities, is easy for non-professionals to operate, and its accuracy can meet most practical purposes. GB/T 18570.10-2005 Surface treatment of steel before coating - Test for the assessment of surface cleanliness - Part 10: On-site titration method for the determination of water-soluble chlorides GB/T18570.10-2005 Standard download decompression password: www.bzxz.net
This part of GB/T18570 specifies the on-site titration method for the determination of water-soluble chlorides. This method is mainly applicable to the assessment of surface impurities, is easy for non-professionals to operate, and its accuracy can meet most practical purposes.

1CS 25. 220. 1u
National Standard of the People's Republic of China
GB/T18570.10—2005/IS08502-10:1999 Preparation of steel substrates before application of paints and relnted productsTests for the assessment of surface cleanliness-Part 10.Field method forthe titrimetric determination of water-soluble chloride (IS0 8502-10.1999.IDT)
2005-09-14 Issued
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China Standardization Administration of the People's Republic of China
2006-04-01 Implementation
GB,T18570.10—2005/IS08502-10,1999GB: Surface treatment of steel materials before burial: Assessment and certification of surface disinfection Part 1: Technical report on field tests of products that can be used as a bath Part 2: Implementation of the requirements for the use of chemical substances Laboratory determination; Part 1, Assessment of the surface quality of steel before coating with floating materials (Yunnan Station method); Part 2: Guidelines for the assessment of the performance of the steel surface before coating and removal of materials; Part 3: Assessment of chloride content on the surface of steel before coating and removal of materials (ion detector method); Part 4: Brele method for sampling of various materials; Part 5: On-site determination method for chloride content on the surface of steel before coating and removal of materials (ion detector method); Part 6: Brele method for sampling of various materials; Part 7: On-site radiometric method for mixed gases; Part 8: On-site radiometric method for mixed gases; Part 9: Determination of relative conductivity of organic salts by means of water-soluble organic compounds; Part 10: Determination of relative conductivity of organic compounds by means of water-soluble organic compounds; Part 11: Field titration method for aqueous solutions! Part 13: Determination of the conductivity of non-salts This part is equivalent to Part 1U of GB/18S7U. This part is equivalent to Part 1S087-71.1999 Surface preparation of materials before coating - Test method for surface cleanliness - Part 1 Calculation of the on-site conductivity of chemical reagents. It is a revised version). Part 13: Determination of the conductivity of non-salts This part is equivalent to Part 1U of GB/18S7U. This part is equivalent to Part 1S087-71.1999 Surface preparation of materials before coating - Test method for surface cleanliness - Part 1 Calculation of the on-site conductivity of chemical reagents. It is a revised version). Part 13: Determination of the conductivity of non-salts This part is equivalent to Part 1U of GB/18S7U. b) Use the decimal point "\" instead of the "\" as the decimal point; "\" instead of the "\" as the decimal point. In addition to the foreword and introduction of international standards, this part is prepared by the National Technical Committee for Paint and Material Standardization Technical Committee for Paint and Material Standardization Technical Committee. The starting unit of this part is China Shipbuilding Industry Research Institute No. 10, China Ministry of Industry and Information Technology Research Institute. The main drafters of this part are Liu Bingyang, Fu Jianhua, Mo Shiai, Yong Nongren. 1
GB/T18570.10—2005/E508502-10:1999 Surface treatment of steel before coating wwW.bzxz.Net
Test for evaluation of surface cleanliness
Part 10 + water
On-site titration method for determination of soluble chlorides
Notice: The method specified in this part of GD/T18570 requires titration with concentrated mercury fluoride. Although the small consumption and low concentration of this adjusting solution are not enough to cause hazards (such as during excavation), from the perspective of regulations, the titration flow may pollute the environment: therefore, this part specifies the requirements for the safe disposal of the adjusting solution. This method also involves the use of hydrogen sulfide and special care must be taken when operating this reagent, which is hazardous. 1 Scope
(3/T18570 specifies the on-site titration method for aqueous solutions. This method is mainly applicable to the assessment of surface quality: it is most suitable for operation by non-professional personnel, and the accuracy can meet most practical needs. 2 Normative references
The following documents have been incorporated into this part of the Standard by reference in part of GH/85. For documents with a date indicated, all subsequent amendments (excluding errors) or revisions do not apply to this part. However, the parties to this part who have reached an agreement on the validity of this document shall consider whether the latest version of this document can be used. For documents without a date indicated, the latest version applies to this part.
H118G70.62035 Detailed test for surface treatment of steel materials before coating Part 6: Sampling of surface quality by Bresle method: (IS08502-6:1995 IDT) 1S0)8532-2:1992 \ Test for the assessment of surface condition of steel materials by coating Part 2: Laboratory determination of chloride on cleaned clothing surfaces
3 Principle
The water-soluble impurities on the test surface can be removed from the surface of the pin by a method (15T% 370,6-05 or other standard method): the solution containing the chemical formula is used as the reagent, the determined liquid is used as the ionizing solution, and the oxide pool in the solution is titrated with dichloromethane and chlorine blue as indicators. The change of the titration solution is selected. The center of the titration droplet and the area of ​​the test surface are generally 25/m1m. The number of drops during the titration is multiplied by · A simple conversion system can be derived to the surface concentration of the oxide. 4 Reaction
The determination is carried out in a test solution with a 2H2O value of .2.3. When the mercury ions in the ionizing solution are added to the test solution, they react with the solution to produce mercuric chloride precipitation. After all the chlorophyll is consumed by titration, the remaining ions react with the indicated reagent - carbazine brown to produce the desired solution and reach the set point.
5 Reagents and materials
5.1 Beaker
Plastic beaker with a capacity of 25mL:
: 1/13570.22001 15085℃2-2: 992GB/T185/0.30—2005/ISO8502-10:1995.2 Reagent
The reagent is a 1/E sodium fluoride (NaF) formula (./. bottle with chemical (EF) to flash add water or remove ions Water, customers should be careful when shaking the quality control. 5.3A new bottle A has a volume of about 20mJ. It contains 1% of the specified in ISC>8502-2:1599. Two parts of blue ethanol solution, two parts of indicator A, and each part is about 0.4. The device should ensure that the indicator A is effective. Oxygen-containing droplets should be used every year: for example, use ordinary rice water, and check once. 5.4B source B needs to store about 2nml. 0.mol/L nitric acid can be added drop by drop (indicator B). Each drop is about 5. 05 mL of the test.
The volume is about 0m2, 0.036al/1. The exact drop is a titration solution (titration C), each drop is (0.35010.002) mL.
The volume of the bottle D is about 201iml. There is a 6072mol/l nitric acid solution and a device for titrating the solution <titration drop>, each drop is (8,150±0.002)mL.
Calculation: The rate of titration C is 5 times the titration minus D 5.7 The volume of the waste container is about 250m1. It is used to store waste liquid, and a small piece of pure needle tablet (can be in the shape of a case, weighing about 5) is built in to absorb the unabsorbed liquid. 6. Removal of water-soluble impurities from the surface of steel materials 6.1 Use Breslc method (see GH/T170,-2005) or other high-standard methods to remove water-soluble impurities from the surface of steel materials 6.2 When using the Hresl-method, if there are no other requirements, use a patch bag of model A1250 (cavity area of ​​1350mu). Regardless of the size of the patch, the volume of the solvent (5.2) in the cavity is proportional to the area of ​​the cavity, which is (3.5±0.> l./mm. 7.1 Collect the sample containing the visible dye to be analyzed in the plastic ring H (5.1). 7.2 Add 2 drops of indicator A (see 5.1) and carefully observe the color change from the burning point to the color change to blue. 7.3 Add 2 drops of indicator A (see 5.4) to reduce the color to the required number of drops. 7.4 Slowly and dropwise add titration solution C (see 1.5), carefully checking the sample cup after each drop until the color of the drop changes from yellow to blue. Record the number of cycles of color change. If only 1 drop of titration solution is needed and a more accurate result is required, replace the titration solution (see 5.6) with titration solution (see 5.6) and repeat the steps of 7.1-7.5 After the titration, the potential concentration in the plastic beaker is removed by the liquid container (5.7). When the waste liquid container is temporarily full, the liquid in it does not contain mercury and can be disposed of at will. However, the zinc flakes that are absorbed from the titration solution and the source D by mercury removal cannot be disposed of directly. According to the usage rate of this set of analytical equipment 15.1~5.7>, the zinc flakes (5.7) are replaced once every 18~1D. When replacing the zinc flakes, the treatment of the old zinc flakes should comply with the regulations and current standards. In case of common dental waste treatment methods:
The results show that
is white. 1 If A-125U adhesive bag is used, the relationship between the effectiveness of the determination solution and the surface expression of the oxide is given in Table 7,4. If the nitrocellulose solution C. used in the titration is converted to 100, if the titration solution used is 1), then the conversion factor is 2U: CB/I1B570.10-2005/IS08502-10; 19998.2 Divide the number in 1 by 10 to obtain the surface density in units of μR/cm. If the cavity area of ​​the actual bite tape used is not -25Vm, multiply the result obtained in 8. by the ratio of 1250 to the actual cavity area of ​​the adhesive tape used (in units of rm>). The density of this method is the difference between the maximum and minimum values. Since the density is not affected by the surface density of the atomized material, it is only affected by the titration concentration. Agreed results
Surface area of ​​the chemical!
Weak oil number
Test report
Minimum value
The test report shall at least include the following contents:
Standard number of this part (G/T13.170.10-2005) n
From the steel surface stability and liquid quality of the case: b)
Area of ​​test surface:
Use only dripping liquid (>:
Restore the sodium nitride surface thickness determined in 8.1 and 8.2; trug/m:
Standard D
Minimum
Maximum
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