Significance and Use
Water-blast cleaning with, (SSPC-TR2/NACE 6C 198) or without, (SSPC-SP 12/NACE No. 5) abrasive, results in flash rusting under some environmental conditions. Inhibitors are used to prevent flash rusting while drying and before coating application. The inhibitor or reaction products of the inhibitor on the substrate becomes part of the coating systems. Coating performance may be influenced by the inhibitor. Soluble contaminants or unreacted inhibitors left on the surface under the coating may cause premature failure. This practice includes a comparison of coating performance with and without inhibitors using various laboratory tests to simulate a range of conditions such as high moisture, marine atmospheric or water immersion.
The user or specifier must determine the specific test methods to be used and exposure conditions. Some test methods referenced may not be applicable to all types of coatings.
1.1 This practice covers procedures to evaluate the compatibility of coatings with inhibitors used to prevent flash rusting of steel before application of coatings.
1.2 The inhibitors are used with water-blast cleaning surface preparation and may be used with or without abrasives.
1.3 The manufacturer of the coatings shall be consulted to ensure compatibility of inhibitors with the coatings.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
A36/A36M Specification for Carbon Structural Steel
B117 Practice for Operating Salt Spray (Fog) Apparatus
D714 Test Method for Evaluating Degree of Blistering of Paints
D822 Practice for Filtered Open-Flame Carbon-Arc Exposures of Paint and Related Coatings
D1193 Specification for Reagent Water
D1654 Test Method for Evaluation of Painted or Coated Specimens Subjected to Corrosive Environments
D2247 Practice for Testing Water Resistance of Coatings in 100 % Relative Humidity
D3359 Test Methods for Measuring Adhesion by Tape Test
D4417 Test Methods for Field Measurement of Surface Profile of Blast Cleaned Steel
D4541 Test Method for Pull-Off Strength of Coatings Using Portable Adhesion Testers
NACETM-01-74 Laboratory Method for Evaluation of Protective Coatings Used as Lining Materials in Immersion Surfaces Available from National Association of Corrosion Engineers (NACE), 1440 South Creek Dr., Houston, TX 77084-4906, http://www.nace.org.
abrasive blasting; coatings; inhibitors; surface preparation; water blasting; Substrates--coating applications; Surface preparation--paints/related coatings; Abrasive blasting; Coatings (paint/related applications); Inhibitors; Water treatment applications;
ICS Number Code 87.040 (Paints and varnishes)
ASTM International is a member of CrossRef.
Citing ASTM Standards
[Back to Top]