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ASTM D5179-16(2021)

Historical Reaffirmation

Standard Test Method for Measuring Adhesion of Organic Coatings in the Laboratory by Direct Tensile Method

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1.1 This test method covers the laboratory determination of organic coating adhesion to plastic substrates by mounting and removing a metal stud from the surface of the coating and measuring the force required to break the coating/substrate bond with a tensile tester. This test method may also be applied to substrates other than plastic.

1.2 This test method requires that the metal stud be adhered directly to the surface of a coated, cured panel (Fig. 1).

FIG. 1 Direct Tensile Model

Direct Tensile ModelDirect Tensile Model

1.3 This test method is used to compare the adhesion of coatings to plastic or other substrates, thus allowing for a quantitative comparison of various coating/substrate combinations in laboratory conditions.

1.4 Other tensile test methods are Test Methods D4541, D7234, D7522, and ISO 4624 (but are not technically equivalent).

1.5 The values stated in SI units are to be regarded as standard. The values given in parentheses are mathematical conversions to inch-pound units that are provided for information only and are not considered standard.

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

1.7 This 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.


4.1 The pull-off strength (commonly referred to as adhesion) of a coating is an important performance property that has been used in specifications. This test method serves as a means for uniformly preparing and testing organic coatings on plastic or other substrates.4 Further information may be found in Appendix X1.

SDO ASTM: ASTM International
Document Number D5179
Publication Date Nov. 1, 2021
Language en - English
Page Count 7
Revision Level 16(2021)
Supercedes
Committee D01.23
Publish Date Document Id Type View
April 1, 2016 D5179-16 Revision
Dec. 10, 2002 D5179-02 Revision
June 10, 1998 D5179-98 Revision
Nov. 1, 2021 D5179-16R21 Reaffirmation
July 1, 2008 D5179-02R08 Reaffirmation