This part of GB/T 18570 specifies the on-site assessment method for the total surface concentration of various water-soluble salts (mainly chlorides and sulfates) on the surface of steel before and after surface pretreatment. This method is not applicable to the determination of the surface concentration of chlorides or sulfates alone. This method is only applicable to the assessment of ionic impurities that represent the majority of impurities. GB/T 18570.9-2005 Surface preparation of steel before coating - Test for assessment of surface cleanliness - Part 9: On-site conductivity determination method for water-soluble salts GB/T18570.9-2005 Standard download decompression password: www.bzxz.net
This part of GB/T 18570 specifies the on-site assessment method for the total surface concentration of various water-soluble salts (mainly chlorides and sulfates) on the surface of steel before and after surface pretreatment. This method is not applicable to the determination of the surface concentration of chlorides or sulfates alone. This method is only applicable to the assessment of ionic impurities that represent the majority of impurities.

IC5 25. 220. 10
National Standard of the People's Republic of China
GB/T 18570,9--2005/IS0 8502-9:1999 Preparation of steel substrates before application of paints and related productsTests for the determination of surface cleanliness-Part 9,Field method for the conductometric determinatlon of water-soluhlesalts(S0 8502-9:1999, IDT)
2005-09-14 Issued
National Quality Supervision, Inspection and Quarantine Administration of the People's Republic of China
2006-04-01 Implementation
GB/T18570.9—2005/TS502-9:199317C Surface treatment of steel materials before coating
The surface clarity test is divided into the following categories: B! Part 1: Field test of fast-falling products (with or without report) Part 2: Laboratory determination of the amount of chemicals on the surface of steel materials before coating (simulated strip method) Part 3: Determination of the amount of dust or dirt on steel surfaces before coating (simulated strip method) Part 4: Evaluation criteria for the accuracy of coating before coating Part 5: Determination of the amount of chemicals on the surface of steel materials (ion strip method) Part 6: Determination of the amount of chemicals on the surface of steel materials before coating (ion strip method) Part 7: Determination of the amount of oils and fats on the surface of steel materials before coating Part 8: Field refraction determination of moisture: Part 1: Field conductivity determination of aqueous salts: Part 10: Motion titration determination of aqueous oxides: Part 11: Field conductivity determination of aqueous fluids: Part 1: Field conductivity determination of aqueous ferric ions: Part 11: Field conductivity determination of aqueous ferric ions: Part 9 of this standard. This standard is equivalent to I5(39502-1019) for the classification of steel materials before weighing, aqueous salts Field test method for electric current 3 (Edition 1: This part is equivalent to 1S) 8502-9,199. For the convenience of use, the following modifications have been made to this part: a) The use of "decimal point" instead of "" as the decimal point" and "" as the decimal point" have been deleted; the previous and final parts of this part are proposed by the China Shipbuilding Industry Corporation. The detailed test for surface cleaning of this part is specified in Part S. Part of the paint and pigment standardization technical committee before coating and coating operation technical committee under the jurisdiction of: Vehicle Department, China Tire Industry No. 1 Research Institute, Huzhou Shipbuilding Industry Association Technical Research Institute, Ministry of Industry and Information Technology Drafting: Fu Bianhua, Qiu Yang, Chai Gou Lu Dang Hongren 1 Fan Tian
GB/T18570.9—2005/ISO8502-9:1999 Surface preparation of steel before coating
Evaluation of surface cleanliness Test
Part 9: In situ conductivity determination of water-soluble salts This part of G/1371 specifies the on-site assessment of the concentration of various aqueous salts (including chlorides and thiols) on the surface of steel before and after surface treatment. This method is not used to determine the surface concentration of monohydrates or sulfates. This method is applicable to the assessment of commercial impurities that represent the majority of impurities. 2 Normative references
The following documents are used in conjunction with this part of G/18570. The references to the parts shall be incorporated into this part. For any referenced documents with a specified date, all subsequent amendments (excluding the contents of the instructions) or revisions shall not apply to this part. However, the parties to the agreement based on this part shall use the latest versions of these documents. For any referenced documents with a specified date, the latest versions shall apply to this part. GH, F18570, 6-2C05 Detailed test of surface activity of copper material surface treatment for coating materials Part 5: Availability Bresle # (15) 85026: 1995) [503696: 987 Analysis of experimental household water specifications and test methods 3 Principle
Use the Bresle method (MGH/T 18570, 5-2005> Use water as a dropper to dissolve salt on a given area of ​​the tempered surface, measure the conductivity of the resulting drop, and then use a simple but accurate formula to calculate the surface conductivity of the salt on the area: 4 dose
less degree 03696: 197 3. The purity of the rated value is not less than 0.5m%/mc55/mm1. It is required to meet this requirement. 5.1 The conductivity collector and the instrument have sufficient wet waste compensation and load capacity: for example, 0mS/m05/cm), for example 200mS/mt200ckS/cm), 5.2 The glass cup has a suitable size and shape, which can be used to place the electrodes of the test (5.1). 5.3 Standard adhesive tape bag meets the requirements of H/T: 9570,6-20054.1, for example, model A-25). Note: The collector is not contaminated with double liquid, and the m produced by the current rainbow paste is less than ? M/m. If the m cannot meet the standard or needs to be improved, the white leather can be tested.
5.4 Syringe
Injection according to GB/T18579.62005 4.2 period..1)/(6621992 equal to JS36951937Www.bzxZ.net
G/T 18570.9~2005/IS0 B502-9;19996 Steps
6.1 Water test and blank test
6.1.1 Add enough water (4) to the filter cup (5,3). The amount of water should meet the requirements of the conductivity meter (5.>. Usually 1ml~20mL is required. Perform the following blank test to avoid the influence of external impurities in the cup, syringe and on the test area. 6.1.2 When using the beaker (5.4), fill it with water, then fill the cup. 6.1.3 Place the water around the entire diameter of the conductivity meter, slowly vibrate it, and record the conductivity (7 and its individual. For example 1. 6.2 Steel rate and viscosity are taken
6.2.1 According to GT3/T: H570.6-2005, Chapter 5 is specified Steps, and set the following requirements as conditions for operation 6.2.2 The water in the beaker should be about 111/4 of the water 6.2.3 The water should be injected into the beaker at night (see GB/T18570.6-20C5 1.). 6.2.4 Do not pull out the syringe needle on the rubber sticker, but inject water into the rubber cavity, and use the syringe needle to inject and withdraw the rubber after heating: 10 times: (GB/T18570.S-2005 7) 3.2.5 After the end of the last cycle, collect as much as possible in the colloid and transfer it to the beaker (S.2) to make the solvent close to 6. +! The original body (see GB/18571.4-2 (5 5.8). 6. 3 Conductivity measurement
Put the conductive material completely into the beaker to remove the impurities in the falling liquid, record the conductivity (%), same as 6.2.3. 7 Expression of results
Total surface concentration of the measured salt: PmA
Where:
\ Pressure of dissolved salt on the surface of the bag cover, unit is thousand points
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