ASTM D5064-16
(Practice)Standard Practice for Conducting a Patch Test to Assess Coating Compatibility
Standard Practice for Conducting a Patch Test to Assess Coating Compatibility
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.
SCOPE
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.
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Designation: D5064 − 16
Standard Practice for
1
Conducting a Patch Test to Assess Coating Compatibility
This standard is issued under the fixed designation D5064; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope Portable Adhesion Testers
D6132 Test Method for Nondestructive Measurement of Dry
1.1 This practice covers the procedures for assessing coat-
Film Thickness of Applied Organic Coatings Using an
ing compatibility when maintenance of an in-place coating
Ultrasonic Coating Thickness Gage
system is being contemplated. It does not address procedures
D6677 Test Method for Evaluating Adhesion by Knife
for assessing the integrity of the existing coating to determine
D7091 Practice for Nondestructive Measurement of Dry
if it can be repainted, nor does it establish the compatibility of
Film Thickness of Nonmagnetic Coatings Applied to
the maintenance coating system with the substrate or corrosion
Ferrous Metals and Nonmagnetic, Nonconductive Coat-
products. The practice is intended for use in the field.
ings Applied to Non-Ferrous Metals
SSPC-TU 3 discusses the risks associated with the mainte-
D7234 Test Method for Pull-OffAdhesion Strength of Coat-
nance painting practice known as overcoating.
ings on Concrete Using Portable Pull-Off Adhesion Tes-
NOTE 1—Pass-Fail Criteria (for example, adhesion requirements) are
ters
not established by this practice.These should be established by the user or
3
2.2 SSPC Standards:
specifier with input from the coating manufacturer.
TU 3 Technology Update 3 Overcoating
1.2 The values stated in SI units are to be regarded as the
standard. The values given in parentheses are for information
3. Terminology
only.
3.1 Definitions—For definitions of terms used in this
1.3 This standard does not purport to address all of the
practice, refer to Terminology D16.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
4. Summary of Test Method
priate safety and health practices and determine the applica-
4.1 The materials under test are applied to the previously
bility of regulatory limitations prior to use.
painted surface after surface preparation.After the appropriate
time has elapsed, the test patch is examined for visual defects
2. Referenced Documents
and adhesion is assessed.
2
2.1 ASTM Standards:
D16 TerminologyforPaint,RelatedCoatings,Materials,and 5. Significance and Use
Applications
5.1 In performing maintenance of a coating system, the new
D3359 Test Methods for Measuring Adhesion by Tape Test
coating being applied must be compatible with the existing
D4138 Practices for Measurement of Dry Film Thickness of
coating. While general guides exist which indicate compatibil-
Protective Coating Systems by Destructive, Cross-
ity of different generic types of coatings, differences in
Sectioning Means
manufacturer’s formulation and the condition of the in-place
D4414 Practice for Measurement of Wet Film Thickness by
coating system may affect compatibility.
Notch Gages
D4541 Test Method for Pull-Off Strength of Coatings Using
6. Procedure
6.1 Select test locations for evaluation that adequately
characterize differences in configuration of the structure and
1
This practice is under the jurisdiction of ASTM Committee D01 on Paint and
the exposure environment; that is, vertical versus horizontal
Related Coatings, Materials, and Applications and is the direct responsibility of
Subcommittee D01.46 on Industrial Protective Coatings. surfaces; sheltered versus unsheltered exposure; atmospheric
Current edition approved July 1, 2016. Published August 2016. Originally
verses splash zone or immersion. A minimum of three test
approved in 1990. Last previous edition approved in 2012 as D5064 – 07 (2012).
locations with one test patch in each is recommended.
DOI: 10.1520/D5064-16.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
3
Standards volume information, refer to the standard’s Document Summary page on Available from Society for Protective Coatings (SSPC), 800 Trumbull Drive,
the ASTM website. Pittsburgh, PA 15205, http://www.sspc.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
D5064 − 16
6.2 The size of each test patch is limited by the size and 6.9 Allow the coating to cure and weather prior to evalua-
configuration of the test locations. Each test patch shall be as tion. Cure durati
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: D5064 − 07 (Reapproved 2012) D5064 − 16
Standard Practice for
1
Conducting a Patch Test to Assess Coating Compatibility
This standard is issued under the fixed designation D5064; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 This practice covers the procedures for testingassessing coating compatibility when maintenance of an in-place coating
system is being contemplated. It does not coveraddress 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 supplier.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
2
2.1 ASTM Standards:
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
3
2.2 SSPC Standards:
TU 3 Technology Update 3 Overcoating
3. Terminology
3.1 Definitions—For definitions of terms used in this practice, refer to Terminology D16.
4. Summary of Test Method
4.1 The materials under test are applied to the previously painted surface after proper surface preparation. After the appropriate
time has elapsed, the test patch is examined for visual defects and adhesion is determined.assessed.
1
This practice is under the jurisdiction of ASTM Committee D01 on Paint and Related Coatings, Materials, and Applications and is the direct responsibility of
Subcommittee D01.46 on Industrial Protective Coatings.
Current edition approved June 1, 2012July 1, 2016. Published August 2012August 2016. Originally approved in 1990. Last previous edition approved in 20072012 as
D5064 – 07.D5064 – 07 (2012). DOI: 10.1520/D5064-07R12.10.1520/D5064-16.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’sstandard’s Document Summary page on the ASTM website.
3
Available from Society for Protective Coatings (SSPC), 800 Trumbull Drive, Pittsburgh, PA 15205, http://www.sspc.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
D5064 − 16
5. 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’smanufacturer’s formulation and the condition of the in-place coating system may affect compatibility.
6. Procedure
6.1 Select test locations for evaluation that properlyadequately characterize differences in configuration of the structure and
expo
...
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