1.1 本试验方法包括评价瓷釉在室温下耐柠檬酸暴露的程序。没有尝试根据瓷釉的耐酸性或非耐酸性对其进行分类，因为该行业的几个分支中的要求不同。 1.2 该测试方法适用于各种形状的器皿，只要它们包含直径约为50mm的基本上平坦的区域。 1.3 该测试方法不适用于可能与强无机酸接触的化学和医院器皿的饰面，也不适用于可能与热酸溶液长时间接触的炊具。 1.4 本标准并不旨在解决与其使用相关的所有安全性问题（如果有）。本标准的使用者有责任在使用前建立适当的安全、健康和环境实践并确定法规限制的适用性。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》中确立的国际公认的标准化原则制定的。 ======意义和用途====== 3.1 本测试方法专门用于测试炉灶、桌面、水槽和其他卫生洁具、洗衣器具、建筑单元等表面在室温下可能与食物酸接触的搪瓷表面。 3.2 选择柠檬酸作为测试介质，因为它是最常见的食用酸之一，并且通常在其对釉质的作用中提供可测量的结果。

1.1 This test method covers a procedure for evaluating porcelain enamels in their resistance to citric acid exposure at room temperature. No attempt is made to categorize porcelain enamels as to their acid-resistance or non acid-resistance properties, since the requirements in the several branches of the industry differ. 1.2 The test method is applicable for ware of various shapes providing they contain a substantially flat area approximately 50 mm in diameter. 1.3 The test method is not applicable to finishes on chemical and hospital ware, which may come in contact with strong mineral acids, nor to cooking utensils, which may come in prolonged contact with hot acid solutions. 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 ====== 3.1 This test method is intended specifically for testing the porcelain enamel finish on stoves, table tops, sinks, and other sanitary ware, laundry appliances, architectural units, etc., where the surface may come in contact with food acids at room temperature. 3.2 Citric acid has been chosen as the test medium because it is one of the most common of the food acids and will generally provide a measurable result in its action on porcelain enamel.