Standard Test Method for Adherence of Porcelain Enamel Coatings to Sheet Metal
2.1 The measurement of adherence in porcelain enamel systems, such as ground coat, ground coat/cover coat, and direct-on cover-coat enamels, is an important procedure for monitoring process variables in metal preparation, enamel application thickness, steel selection, and enamel selection, as well as assuring the ultimate quality of the finished product.
1.1 The scope of this test method is:
1.1.1 To determine quantitatively the amount of enamel remaining after the porcelain enamel coating specimen has been deformed;
1.1.2 To standardize the deformation parameters for testing adherence of porcelain enamel to sheet metal; and,
1.1.3 To provide a quantitative adherence rating scale for comparison to reference standards.
1.2 This adherence test method is applicable to porcelain enamel coatings on substrates from 18 to 24 gauge (0.0478 to 0.025 in. or from 1.214 to 0.654 mm).
1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
1.4 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.
1.5 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.
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