1.1 本标准详细介绍了一种实验室方法，以加速暴露于吸湿腐蚀性氯化物对电镀铬部件的影响。它适用于任何使用电镀铬作为最终金属涂层的基材和涂层系统。 1.2 现场经验表明，吸湿性氯化物对镀铬沉积物的侵蚀性明显高于氯化钠。其中最常见的是氯化钙。 1.3 本标准未规定用于特定产品的暴露期，也未规定对结果的解释。在对涂层系统进行规定之前，应确定本试验的适用性以及结果与使用经验的相关性。 1.4 以国际单位制表示的数值应视为标准值。 本标准不包括其他计量单位。 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====== 3.1 本试验在实验室复制了含有吸湿氯化物和固体材料（泥浆）的膜对电镀铬的腐蚀作用。 该试验的反应介质，即试验泥浆，是为了模拟俄罗斯冬季在电镀铬沉积物上发现的薄膜而开发的，因此该试验的俗称为俄罗斯泥浆试验。 3.2 该测试用于规范验收、模拟服务评估、制造控制和研发。它是专门为接触吸湿性氯化物的电镀铬涂层的部件开发的。可以使用测试和生产样本。使用标准化测试有助于提高镀铬部件的质量，并有助于开发改进的镀铬系统。 3.3 本试验模拟了当暴露于“泥/固体材料”和吸湿氯化物（最常见的氯化钙）的组合时，电沉积装饰性和功能性铬沉积物的损失量。 该指标仅为铬和相邻镍层的损耗。用于镍/铬电镀部件的其他试验，如CASS（试验方法 B368型 )，模拟零件对涉及所有组件沉积物和基板的基底金属腐蚀的电阻。

1.1 This standard details a laboratory method to accelerate the effects of exposure to hygroscopic corrosive chloride compounds on electroplated chromium components. It is applicable to any substrate and coating system that utilizes electroplated chromium as the final metallic coating. 1.2 Field experience has shown that hygroscopic chlorides are significantly more aggressive than sodium chloride toward chromium electroplated deposits. The most common of which is calcium chloride. 1.3 The standard does not specify exposure periods to be used for a specific product nor the interpretation to be given to the results. The suitability of this test and correlation of results with service experience should be determined before it is specified for coating systems. 1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this 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 ====== 3.1 This test replicates in the laboratory the corrosive actions of a film containing hygroscopic chlorides and solid material (mud) on electroplated chromium. The test’s reactive media, the test slurry, was developed to simulate the film found on electroplated chromium deposits during a winter in Russia, thus the common name for the test, Russian Mud Test. 3.2 This test is used for specification acceptance, simulated service evaluation, manufacturing control, and research and development. It was developed specifically for use on components with electrodeposited chromium coatings exposed to hygroscopic chlorides. Test and production specimens may be used. Use of a standardized test could help in developing improved quality of chromium electrodeposited components and lead to the development of improved electroplated chromium systems. 3.3 This test simulates the amount of electrodeposited decorative and functional chromium deposit lost when exposed to the combination of “mud/solid material” and hygroscopic chlorides, most commonly calcium chloride. The metric is the loss of only the chromium and adjacent nickel layer. Other tests used with nickel/chromium electroplated components, such as CASS (Test Method B368 ), simulate the resistance of the part to basis metal corrosion involving all of the component’s deposits and substrate.