1.1 本试验方法描述了电绝缘液体中腐蚀性含硫化合物（无机和有机）的检测。 1.2 新的和在用的绝缘液体可能含有元素硫或硫化合物，或两者兼而有之，在某些使用条件下会引起腐蚀。该试验方法旨在通过在规定条件下使铜或银与绝缘液体接触来检测游离（元素）硫和腐蚀性硫化合物的存在或形成的倾向。 1.3 以国际单位制表示的数值应视为标准。包括英寸磅单位以供参考。 1.4 本标准并不旨在解决与其使用相关的所有安全问题（如有）。本标准的使用者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 在大多数用途中，绝缘液体不断与易受腐蚀的金属接触。元素硫或腐蚀性硫化合物的存在会导致这些金属变质，并形成导电或高电阻薄膜。变质程度取决于腐蚀剂的数量和类型以及时间和温度因素。检测这些不良杂质，即使不是从定量值的角度，也是识别所涉及危险的一种手段。 3.2 提供了两种方法，一种用于铜腐蚀，另一种用于银腐蚀。铜对硫腐蚀的敏感性略低于银，但结果更容易解释，也不容易出错。银腐蚀程序特别提供给那些具有绝缘液体与银表面接触的应用的用户。

1.1 This test method describes the detection of corrosive sulfur compounds (both inorganic and organic) in electrical insulating liquids. 1.2 New and in-service insulating liquids may contain elemental sulfur or sulfur compounds, or both, that cause corrosion under certain conditions of use. This test method is designed to detect the presence of, or the propensity to form, free (elemental) sulfur and corrosive sulfur compounds by subjecting copper or silver to contact with an insulating liquid under prescribed conditions. 1.3 The values stated in SI units are to be regarded as the standard. Inch-pound units are included for informational purposes. 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 In most of their uses, insulating liquids are continually in contact with metals that are subject to corrosion. The presence of elemental sulfur or corrosive sulfur compounds will result in deterioration of these metals and cause conductive or high resistive films to form. The extent of deterioration is dependent upon the quantity and type of corrosive agent and time and temperature factors. Detection of these undesirable impurities, even though not in terms of quantitative values, is a means for recognizing the hazard involved. 3.2 Two methods are provided, one for copper corrosion and one for silver corrosion. Copper is slightly less sensitive to sulfur corrosion than silver but the results are easier to interpret and less prone to error. The silver corrosion procedure is provided especially for those users who have applications where the insulating liquid is in contact with a silver surface.