1.1 这些试验方法包括测定搪瓷的表面耐磨性和表面下耐磨性。 1.2 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。 1.3 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====== 4.1 当搪瓷首次受到这些试验中所涉及类型的磨损时，磨损率相对较低。随着牙釉质持续磨损，磨损率增加，直到达到稳定值。此后，磨损率几乎保持不变，直到珐琅质被穿透，底层底层或金属暴露。在失重率增加期间发生的磨损被定义为表面磨损，并导致高光泽瓷漆的光泽和清洁性降低，颜色、外观或表面纹理的改变，或其与低光泽瓷漆的组合- 光泽搪瓷。在稳定失重率期间发生的磨损被定义为表面磨损，并导致涂层连续性的破坏。这两种类型的磨损不一定成比例，由于需要能够确定搪瓷对这两种磨损的阻力，因此有必要分别处理每种磨损。

1.1 These test methods cover determination of the resistance of porcelain enamels to surface abrasion and subsurface abrasion. 1.2 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. 1.3 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 ====== 4.1 When a porcelain enamel is first subjected to abrasion of the type involved in these tests, the rate of wear or attrition is relatively low. As the enamel is subjected to continued abrasion, the rate of wear increases until it reaches a steady value. Thereafter, the rate of wear remains almost constant until the enamel is penetrated and the underlying ground coat or metal exposed. The abrasion that occurs during the period of increasing rate-of-weight loss is defined as surface abrasion and results in reduced gloss and cleanability with high-gloss enamels and a modification of color, appearance, or surface texture, or combination thereof with low-gloss enamels. The abrasion that occurs during the period of steady rate-of-weight loss is defined as subsurface abrasion and results in the destruction of the continuity of the coating. These two types of abrasion are not necessarily proportional, and since it is desirable to be able to determine the resistance of porcelain enamel to both types of abrasion, it is necessary to deal with each one separately.