1.1 这些试验方法包括测定有机涂层的耐磨性，该耐磨性是由磨料落在应用于平面刚性表面（如金属或玻璃面板）的涂层上产生的。 1.2 以下介绍了基于不同磨料的两种试验方法: 小节 方法A——落砂磨损试验 6 – 13 方法B-掉落碳化硅磨损试验 14 – 21 1.3 由于方法的再现性较差，当使用数值时，这些方法应仅限于在一个实验室中进行测试（见 13.1.2 和 21.1.2 ). 当使用排名代替数值时，实验室间的一致性显著提高。 1.4 以国际单位制表示的数值应视为标准。国际单位制后括号中给出的值仅供参考，不被视为标准值。 1.5 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。 1.6 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 与碳化硅相比，硅砂对有机涂层的磨损速度较慢。对于某些类型的涂层，它也可能提供更大的差异。 5.2 两种方法产生的耐磨性等级不同，但两种方法提供的耐磨性涂层等级大致相同。 5.3 已发现每种方法都有助于评估特定类型涂层的耐磨性。例如，方法A（落砂）用于对地板涂层进行评级，而方法B（落碳化硅）用于对船舶甲板的涂层进行评级。 图1 磨损试验装置

1.1 These test methods cover the determination of the resistance of organic coatings to abrasion produced by abrasive falling onto coatings applied to a plane rigid surface, such as a metal or glass panel. 1.2 Two test methods based on different abrasives are covered as follows: Sections Method A—Falling Sand Abrasion Test 6 – 13 Method B—Falling Silicon Carbide Abrasion Test 14 – 21 1.3 These methods should be restricted to testing in only one laboratory when numerical values are used because of the poor reproducibility of the methods (see 13.1.2 and 21.1.2 ). Interlaboratory agreement is improved significantly when ranking is used in place of numerical values. 1.4 The values stated in SI units are to be regarded as the standard. The values given in parentheses after SI units are for information only and are not considered standard. 1.5 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. 1.6 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 Silica sand produces a slower rate of abrasion for organic coatings than that provided by silicon carbide. For some types of coatings, it may also provide greater differentiation. 5.2 The abrasion resistance scales produced by the two methods differ, but the methods provide approximately the same rankings of coatings for abrasion resistance. 5.3 Each of the methods has been found useful for rating the abrasion resistance of specific types of coatings. For example Method A (falling sand) has been used for rating floor coatings while Method B (falling silicon carbide) has been used for rating coatings for ship decks. FIG. 1 Abrasion Test Apparatus