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ASTM D5064-07(2012)

(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 may affect compatibility.
SCOPE
1.1 This practice covers the procedures for testing coating compatibility when maintenance of an in-place coating system is being contemplated. It does not cover 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. 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.  
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.

General Information

Status
Historical
Publication Date
31-May-2012
ICS
25.220.99 - Other treatments and coatings
Technical Committee
D01 - Paint and Related Coatings, Materials, and Applications
Drafting Committee
D01.46 - Industrial Protective Coatings
Current Stage
Ref Project

Relations

Replaces
ASTM D5064-07 - Standard Practice for Conducting a Patch Test to Assess Coating Compatibility
Effective Date
01-Jun-2012
Replaced By
ASTM D5064-16 - Standard Practice for Conducting a Patch Test to Assess Coating Compatibility
Effective Date
01-Jul-2016
Referred By
ASTM D3276-21 - Standard Guide for Painting Inspectors (Metal Substrates)
Effective Date
01-Jun-2012
Referred By
ASTM E1796-20 - Standard Guide for Selection and Use of Liquid Coating Encapsulation Products for Leaded Paint in Buildings
Effective Date
01-Jun-2012
Referred By
ASTM D6577-15(2019) - Standard Guide for Testing Industrial Protective Coatings
Effective Date
01-Jun-2012
Referred By
ASTM D6237-19 - Standard Guide for Painting Inspectors (Concrete and Masonry Substrates)
Effective Date
01-Jun-2012

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ASTM D5064-07(2012) - Standard Practice for Conducting a Patch Test to Assess Coating CompatibilityASTM D5064-07(2012) - Standard Practice for Conducting a Patch Test to Assess Coating Compatibility
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ASTM D5064-07(2012) - Standard Practice for Conducting a Patch Test to Assess Coating Compatibility
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: D5064 − 07(Reapproved 2012)
Standard Practice for
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 Film Thickness of Applied Organic Coatings Using an
Ultrasonic Gage
1.1 This practice covers the procedures for testing coating
D6677 Test Method for Evaluating Adhesion by Knife
compatibility when maintenance of an in-place coating system
D7091 Practice for Nondestructive Measurement of Dry
is being contemplated. It does not cover procedures for
Film Thickness of Nonmagnetic Coatings Applied to
assessing the integrity of the existing coating to determine if it
Ferrous Metals and Nonmagnetic, Nonconductive Coat-
can be repainted, nor does it establish the compatibility of the
ings Applied to Non-Ferrous Metals
maintenance coating system with the substrate or corrosion
D7234 Test Method for Pull-OffAdhesion Strength of Coat-
products. The practice is intended for use in the field.
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
specifier with input from the supplier.
3. Terminology
1.2 The values stated in SI units are to be regarded as the
3.1 Definitions—For definitions of terms used in this
standard. The values given in parentheses are for information
practice, refer to Terminology D16.
only.
1.3 This standard does not purport to address all of the 4. Summary of Test Method
safety concerns, if any, associated with its use. It is the
4.1 The materials under test are applied to the previously
responsibility of the user of this standard to establish appro-
painted surface after proper surface preparation. After the
priate safety and health practices and determine the applica-
appropriate time has elapsed, the test patch is examined for
bility of regulatory limitations prior to use.
visual defects and adhesion is determined.
2. Referenced Documents
5. Significance and Use
2.1 ASTM Standards:
5.1 In performing maintenance of a coating system, the new
D16 TerminologyforPaint,RelatedCoatings,Materials,and
coating being applied must be compatible with the existing
Applications
coating. While general guides exist which indicate compatibil-
D3359 Test Methods for Measuring Adhesion by Tape Test
ity of different generic types of coatings, differences in
D4138 Practices for Measurement of Dry Film Thickness of
manufacturer’s formulation and the condition of the in-place
Protective Coating Systems by Destructive, Cross-
coating may affect compatibility.
Sectioning Means
D4414 Practice for Measurement of Wet Film Thickness by
6. Procedure
Notch Gages
6.1 Select test locations for evaluation that properly charac-
D4541 Test Method for Pull-Off Strength of Coatings Using
terize differences in configuration of the structure and expo-
Portable Adhesion Testers
sure; that is, vertical versus horizontal surfaces and sheltered
D6132 Test Method for Nondestructive Measurement of Dry
versusunshelteredexposure.Aminimumofthreetestlocations
with one test patch in each is recommended.
6.2 The size of each test patch will be determined by the
This practice is under the jurisdiction of ASTM Committee D01 on Paint and
size and configuration of the test locations. Each test patch
Related Coatings, Materials, and Applications and is the direct responsibility of
Subcommittee D01.46 on Industrial Protective Coatings.
shall be as large as possible, with a minimum size of 1.0 m
Current edition approved June 1, 2012. Published August 2012. Originally 2
(10.8 ft ) recommended.
approved in 1990. Last previous edition approved in 2007 as D5064 – 07. DOI:
10.1520/D5064-07R12.
6.3 Prepare the surface of the test areas using the methods
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
specified for the maintenance painting procedure (Note 2).
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Alternative methods of preparation may also be evaluated in
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. separate, adjacent tests.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D5064 − 07 (2012)
NOTE 2—This test method assesses compatibility with the existing
6.9.1 Long-Term Curing—Curing for as long a time as
coating only and does not apply to areas w
...

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5.1 This test method is an extension of Test Method D5403. While Test Method D5403 specifies that a test specimen be cured by exposure to UV or EB as prescribed by the supplier of the material, most radiation curable monomers and oligomers provided as raw materials to formulators are not designed to be used alone but rather as blends of monomers and oligomers so that there are no “supplier prescribed” exposure conditions. Test Method D5403 is not appropriate for the measurement of volatiles from thin radiation-curable coatings because supplier prescribed cure conditions include both a thickness and an exposure specification which are difficult or impossible to achieve in a test lab. Furthermore, inks form a special class of thin radiation curable coatings because they are formulated with known interferences (for example, pigments). As a result, Test Method D5403 does not provide a method for measuring volatiles from monomers and oligomers used as raw materials in the formulation of radiation curable coatings nor does it provide a method for measuring volatiles from thin radiation curable coatings such as inks.  
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5.1 This test procedure is used to simulate the physical and environmental stresses that a coating for exterior transportation applications (for example, automotive) is exposed to in a subtropical climate, such as southern Florida. It has been found that such a subtropical climate causes particularly severe deterioration of such coatings. The long water exposures and wet/dry cycling found in southern Florida are particularly important for this deterioration, in addition to the high dosage of solar radiation (3). This practice was developed to address the deficiencies of historical tests used for transportation coatings, especially automotive coatings (4).
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SCOPE
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