1.1 本规程规定了工业防护涂层耐化学品浸泡性的评估程序。 1.2 内衬是一种特殊类型的涂层，旨在保护基材免受连续或间歇性流体浸泡造成的腐蚀。 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。 1.4 本标准并不旨在解决与其使用相关的所有安全问题（如有）。本标准的使用者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。 ====意义和用途====== 4.1 保护涂层用于金属和混凝土储存和加工船、船运集装箱、水坝和轨道车，以保护基材免受腐蚀性侵蚀，并保护储存的材料（货物）免受污染。该方法提供了一种基于视觉观察来评估保护涂层抵抗化学物质降解的能力以及保护液体货物免受基材或涂层污染的能力的方法。 其他退化措施，如涂层材料重量或尺寸的变化，或货物的化学变化，可用于评估缔约方之间相互商定的这种保护能力。衬里材料的简单耐化学性评估可以通过其他相关方法更方便地进行，作为根据试验方法进行该程序的预筛选试验 C267 和 D471 . 4.2 本规程涵盖了三种评估衬里涂层材料适用性的方法。 4.2.1 方法A-- 在大气压力下恒温（即没有热梯度）条件下对试样进行评估。 4.2.2 方法B-- 在提供样品温度梯度的条件下对样品进行评估。 4.2.3 方法C-- 在恒定温度和增加压力（即没有热梯度）的条件下对试样进行评估。

1.1 This practice establishes procedures for the evaluation of the resistance of industrial protective coatings to immersion in chemicals. 1.2 Linings are a particular type of coating intended for protection of substrates from corrosion as a result of continuous or intermittent fluid immersion. 1.3 The values stated in SI units are to be regarded as the standard. The values given in parenthesis are for information only. 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 ====== 4.1 Protective coatings are used on metallic and concrete storage and processing vessels, shipping containers, dams and rail cars to protect the substrate from corrosive attack and to protect stored materials (cargo) from contamination. This method provides a means to assess the ability of a protective coating to resist degradation by chemicals and to protect the liquid cargo from contamination by either the substrate or coating, based on visual observations. Other measures of degradation, such as changes in weight or dimensions of the coating material, or chemical changes to the cargo, may be used to assess this protective ability as mutually agreed upon between contracting parties. Simple chemical-resistance evaluations of the lining materials may be performed more conveniently by other pertinent methods as a prescreening test for this procedure in accordance with Test Methods C267 and D471 . 4.2 This practice covers three approaches to conducting evaluations of a lining coating material’s fitness for purpose. 4.2.1 Method A— Evaluation of specimens under conditions of constant temperature at atmospheric pressure (that is, without a thermal gradient). 4.2.2 Method B— Evaluation of specimens under conditions which provide a temperature gradient across the sample. 4.2.3 Method C— Evaluation of specimens under conditions of constant temperature and increased pressure (that is, without a thermal gradient).