1.1 搪瓷涂层应用于金属，以提供防腐蚀保护以及改善其外观。该测试方法允许容易地检测不连续和光覆盖区域，这些区域不容易通过目视检查看到，这限制了对基板的保护。在测试方法中可以找到适用于化学反应容器中使用的较厚玻璃涂层的有点类似的测试 C536 和 C537 . 1.2 以SI单位表示的值应被视为标准。英寸-磅单位仅供参考。 1.3 本标准并不旨在解决与其使用相关的所有安全性问题（如果有）。本标准的使用者有责任在使用前建立适当的安全、健康和环境实践并确定法规限制的适用性。1.4 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。

1.1 Porcelain enamel coatings are applied to metals to provide protection from corrosion as well as to enhance their appearance. This test method permits the easy detection of discontinuities and areas of light coverage, not readily seen by visual inspection, which limit the protection to the substrate. Somewhat similar tests applicable to the thicker glass coatings used for chemical reaction vessels are found in Test Methods C536 and C537 . 1.2 Values stated in SI units are to be regarded as the standard. Inch-pound units are provided 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.4 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.