1.1 本规程涵盖了在类似于盐雾试验的装置中测试涂层耐水性的基本原理和操作程序。 1.2 本规程仅限于获取、测量和控制水雾试验条件和程序的方法。它没有规定试样制备、特定试验条件或结果评估。 注1: 测试涂层耐水性的替代做法包括 D870 , D2247 和 D4585 . 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。 1.5 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》中确立的国际公认标准化原则制定的。 ====意义和用途====== 4.1 水会导致涂层降解，因此了解涂层如何抗水有助于预测其使用寿命。水雾试验失败可能由多种因素引起，包括涂层本身的缺陷、基材的污染或表面处理不足。 因此，该测试有助于单独评估涂层或完整涂层系统。 4.2 水雾试验用于涂层和基材处理的研究和开发、规范验收和制造过程中的质量控制。这些测试通常会导致通过或失败的确定，但也可以测量失败的程度。如果在指定时间段后没有证据表明与水相关的故障，则认为涂层系统合格。 4.3 在确定涂层或涂层系统的定量相关性之前，根据本规程使用水雾试验获得的结果不应表示为等同于在自然环境中暴露于水的时间。 4.4 试验装置与实际使用的装置类似 B117 将该装置从盐雾试验转换为水雾试验是可行的。当从盐雾测试转换为水雾测试时，应注意清除机柜和储液罐中的所有微量盐。

1.1 This practice covers the basic principles and operating procedures for testing water resistance of coatings in an apparatus similar to that used for salt spray testing. 1.2 This practice is limited to the methods of obtaining, measuring, and controlling the conditions and procedures of water fog tests. It does not specify specimen preparation, specific test conditions, or evaluation of results. Note 1: Alternative practices for testing the water resistance of coatings include Practices D870 , D2247 , and D4585 . 1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses 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 Water can cause the degradation of coatings, so knowledge of how a coating resists water is helpful in predicting its service life. Failure in water fog tests may be caused by a number of factors, including a deficiency in the coating itself, contamination of the substrate, or inadequate surface preparation. The test is therefore useful for evaluating coatings alone or complete coating systems. 4.2 Water fog tests are used for research and development of coatings and substrate treatments, specification acceptance, and quality control in manufacturing. These tests usually result in a pass or fail determination, but the degree of failure may also be measured. A coating system is considered to pass if there is no evidence of water-related failure after a specified period of time. 4.3 Results obtained from the use of water fog tests in accordance with this practice should not be represented as being equivalent to a period of exposure to water in the natural environment, until the degree of quantitative correlation has been established for the coating or coating system. 4.4 The test apparatus is similar to that used in Practice B117 , and the conversion of the apparatus from salt spray to water fog testing is feasible. Care should be taken to remove all traces of the salt from the cabinet and reservoir when converting from salt spray to water fog testing.