1.1 本指南涵盖了确定有机涂层金属基材对丝状腐蚀形成的敏感性的三个程序。 1.2 本指南仅限于确定有机涂层和基材之间是否会发生丝状腐蚀。 1.3 以国际单位制表示的数值应视为标准。括号中给出的值仅供参考。 注1: 本标准的程序B等同于ISO 4623。 1.4 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。 1.5 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 当涂膜破裂且相对湿度在70至95℃时，应用于金属基材的一些有机涂层表现出丝状腐蚀 % 范围 5.2 本指南可用于确定有机涂层金属基材对丝状腐蚀形成的敏感性。

1.1 This guide covers three procedures for determining the susceptibility of organic-coated metal substrates to formation of filiform corrosion. 1.2 This guide is limited to the determination of whether filiform corrosion will occur between the organic coating and substrate. 1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. Note 1: Procedure B of this standard is equivalent to ISO 4623. 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, health, and environmental 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. ====== Significance And Use ====== 5.1 Some organic coatings applied to metal substrates exhibit filiform corrosion when there is a break in the coating film and the relative humidity is in the 70 to 95 % range. 5.2 This guide can be used to determine the susceptibility of organic coated metal substrates to the formation of filiform corrosion.