Standard Practice for Conducting a Patch Test to Assess Coating Compatibility

Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

06-29-2021

Publisher

American Society for Testing and Materials

1.1This 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.

1.2The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.

1.3This 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.4This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

Committee	D 01
DocumentType	Standard Practice
Pages	3
PublisherName	American Society for Testing and Materials
Status	Current
Supersedes	ASTM D 5064 : 2016 : REV A

ASTM D 3276 : 2015 : EDT 1	Standard Guide for Painting Inspectors (Metal Substrates)
ASTM D 6577 : 2015 : R2019	Standard Guide for Testing Industrial Protective Coatings
ASTM D 6237 : 2019	Standard Guide for Painting Inspectors (Concrete and Masonry Substrates)
ASTM E 1796 : 2020	Standard Guide for Selection and Use of Liquid Coating Encapsulation Products for Leaded Paint in Buildings

ASTM D 4138 : 2007 : REV A : R2022	Standard Practices for Measurement of Dry Film Thickness of Protective Coating Systems by Destructive, Cross-Sectioning Means
ASTM D 7091 : 2022	Standard Practice for Nondestructive Measurement of Dry Film Thickness of Nonmagnetic Coatings Applied to Ferrous Metals and Nonmagnetic, Nonconductive Coatings Applied to Non-Ferrous Metals
ASTM D 7234 : 2019	Standard Test Method for Pull-Off Adhesion Strength of Coatings on Concrete Using Portable Pull-Off Adhesion Testers
ASTM D 16 : 2019	Standard Terminology for Paint, Related Coatings, Materials, and Applications
ASTM D 3359 : 2022	Standard Test Methods for Rating Adhesion by Tape Test
ASTM D 4541 : 2017	Standard Test Method for Pull-Off Strength of Coatings Using Portable Adhesion Testers
ASTM D 4541 : 2022	Standard Test Method for Pull-Off Strength of Coatings Using Portable Adhesion Testers
ASTM D 6132 : 2013 : R2017	Standard Test Method for Nondestructive Measurement of Dry Film Thickness of Applied Organic Coatings Using an Ultrasonic Coating Thickness Gage
ASTM D 16 : 2024	Standard Terminology for Paint, Related Coatings, Materials, and Applications
ASTM D 7091 : 2021	Standard Practice for Nondestructive Measurement of Dry Film Thickness of Nonmagnetic Coatings Applied to Ferrous Metals and Nonmagnetic, Nonconductive Coatings Applied to Non-Ferrous Metals
ASTM D 6677 : 2018	Standard Test Method for Evaluating Adhesion by Knife
ASTM D 6132 : 2013 : R2022	Standard Test Method for Nondestructive Measurement of Dry Film Thickness of Applied Organic Coatings Using an Ultrasonic Coating Thickness Gage
ASTM D 6677 : 2018 : R2022	Standard Test Method for Evaluating Adhesion by Knife
ASTM D 3359 : 2023	Standard Test Methods for Rating Adhesion by Tape Test
ASTM D 4138 : 2007 : REV A : R2017	Standard Practices for Measurement of Dry Film Thickness of Protective Coating Systems by Destructive, Cross-Sectioning Means
ASTM D 7234 : 2021	Standard Test Method for Pull-Off Adhesion Strength of Coatings on Concrete Using Portable Pull-Off Adhesion Testers
ASTM D 7234 : 2022	Standard Test Method for Pull-Off Strength of Coatings on Concrete Using Portable Pull-Off Adhesion Testers
ASTM D 3359 : 2017	Standard Test Methods for Rating Adhesion by Tape Test
ASTM D 16 : 2023	Standard Terminology for Paint, Related Coatings, Materials, and Applications