1.1 这些试验方法包括加速测定铝合金上搪瓷涂层的耐潮湿或风化剥落性。试验方法A， 2. 使用5 % 氯化铵溶液需要96小时浸泡，而试验方法B， 3. 使用1 % 浸泡20小时后，完成三氯化锑溶液。在两种方法中，采用相同的标准评估剥落趋势。虽然这两种方法都适用于镁硅合金，如6061，但试验方法B优先用于简单合金或商用纯铝，如1100。 1.2 试验方法按以下顺序出现: 小节 试验方法A-氯化铵 4 – 9 试验方法B-三氯化锑 10 – 15 1.3 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====== 3.1 层裂试验的重要性怎么强调都不为过。未通过此测试的搪瓷铝如果受潮或风化，在使用中可能会剥落。

1.1 These test methods cover accelerated determination of the resistance of porcelain enamel coatings on aluminum alloys to spalling from exposure to moisture or weathering. Test Method A, 2 using a 5 % solution of ammonium chloride, requires 96-h immersion while Test Method B, 3 using a 1 % solution of antimony trichloride, is completed after 20 h of immersion. The spalling tendency is evaluated by the same criteria in both methods. While either method is suitable for magnesium silicon alloys, such as 6061, Test Method B is preferred for simple alloys or commercially pure aluminum, such as 1100. 1.2 The test methods appear in the following order: Sections Test Method A—Ammonium Chloride 4 – 9 Test Method B—Antimony Trichloride 10 – 15 1.3 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 ====== 3.1 It is difficult to overemphasize the importance of the spall test. Porcelain enameled aluminum that fails this test will probably spall in service if subjected to moisture or weathering.