1.1 本规程涵盖了确定用作冷成型框架构件的金属涂层钢板、涂漆金属涂层钢板和涂漆非金属涂层钢板的可接受性的程序。 1.2 本规程应用于在实验室试验中评估钢板上不同涂层的耐腐蚀性。不得将其用作冷成型框架构件的应用性能标准。 1.3 本规程应用于评估正在考虑添加到规范中的涂层 A1003/A1003M . 1.4 以英寸-磅或国际单位制表示的数值应单独视为标准值。在文本中，国际单位显示在括号中。每个系统中规定的值不是精确的等价物；因此，每个系统必须相互独立使用。 1.5 本标准的文本引用了提供解释材料的注释和脚注。这些注释和脚注（不包括表和图中的注释和脚注）不应视为本标准的要求。 1.6 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.7 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》中确立的国际公认标准化原则制定的。 ====意义和用途====== 5.1 本规程仅用于评估用于制造冷成型框架构件的金属涂层、涂漆金属涂层和涂漆非金属涂层材料。 5.2 基于暴露于实践提供的测试环境的腐蚀性能的相关性和外推 B117 并不总是可预测的。只有在进行了适当的证实长期大气暴露的情况下，才应考虑相关性和外推。 5.3 本规程评估涂层材料是否当前不在规范中 A1003/A1003M 满足要求的最小腐蚀特性。

1.1 This practice covers procedures for establishing the acceptability of metallic-coated steel sheet, painted metallic-coated steel sheet, and painted nonmetallic-coated steel sheet for use as cold formed framing members. 1.2 This practice shall be used to assess the corrosion resistance of different coatings on steel sheet in a laboratory test. It shall not be used as an application performance standard for the cold formed framing members. 1.3 The practice shall be used to evaluate coatings under consideration for addition to Specification A1003/A1003M . 1.4 The values stated in either inch-pound or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. 1.5 The text of this standard references notes and footnotes that provide explanatory material. These notes and footnotes, excluding those in tables and figures, shall not be considered as requirements of the 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. ====== Significance And Use ====== 5.1 This practice is intended solely for the evaluation of metallic-coated, painted metallic-coated, and painted nonmetallic-coated materials used for the manufacture of cold formed framing members. 5.2 Correlation and extrapolation of corrosion performance based on exposure to the test environment provided by Practice B117 are not always predictable. Correlation and extrapolation should be considered only in cases where appropriate corroborating long-term atmospheric exposures have been conducted. 5.3 This practice assesses whether coated materials not currently in Specification A1003/A1003M satisfy the required minimum corrosion characteristics.