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Significance and Use
5.1 In performing maintenance of a coating system, the new coating being applied must be compatible with the existing coating. While general guides exist which indicate compatibility of different generic types of coatings, differences in manufacturer’s formulation and the condition of the in-place coating system may affect compatibility.
1.1 This practice covers the procedures for assessing coating compatibility when maintenance of an in-place coating system is being contemplated. It does not address procedures for assessing the integrity of the existing coating to determine if it can be repainted, nor does it establish the compatibility of the maintenance coating system with the substrate or corrosion products. The practice is intended for use in the field. SSPC-TU 3 discusses the risks associated with the maintenance painting practice known as overcoating.
Note 1: Pass-Fail Criteria (for example, adhesion requirements) are not established by this practice. These should be established by the user or specifier with input from the coating manufacturer.
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.3 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.
D16 Terminology for Paint, Related Coatings, Materials, and Applications
D3359 Test Methods for Measuring Adhesion by Tape Test
D4138 Practices for Measurement of Dry Film Thickness of Protective Coating Systems by Destructive, Cross-Sectioning Means
D4414 Practice for Measurement of Wet Film Thickness by Notch Gages
D4541 Test Method for Pull-Off Strength of Coatings Using Portable Adhesion Testers
D6132 Test Method for Nondestructive Measurement of Dry Film Thickness of Applied Organic Coatings Using an Ultrasonic Coating Thickness Gage
D6677 Test Method for Evaluating Adhesion by Knife
D7091 Practice for Nondestructive Measurement of Dry Film Thickness of Nonmagnetic Coatings Applied to Ferrous Metals and Nonmagnetic, Nonconductive Coatings Applied to Non-Ferrous Metals
D7234 Test Method for Pull-Off Adhesion Strength of Coatings on Concrete Using Portable Pull-Off Adhesion Testers
SSPC StandardsTU 3 Technology Update 3 Overcoating
ICS Number Code 25.220.99 (Other treatments and coatings)
UNSPSC Code 31211500(Paints and primers)
|Link to Active (This link will always route to the current Active version of the standard.)|
ASTM D5064-16, Standard Practice for Conducting a Patch Test to Assess Coating Compatibility, ASTM International, West Conshohocken, PA, 2016, www.astm.orgBack to Top