1.1本规范涵盖了含有至少99.7%质量%钯金属的电沉积钯涂层的要求。还涵盖了由钯和薄镀金组成的复合涂层，用于涉及电触点的应用。 1.2 属性 — 钯是铂族金属中最轻、最不贵的一种。其比重为12.0，大大低于金（19.3）和铂（21.5）。这产生了更大的涂层体积或厚度，因此，在一定程度上节省了金属重量，同时在耐腐蚀性和反射率方面也有少量牺牲。下表比较了电沉积钯与其他电沉积贵金属和合金的硬度范围 (1,2) . 近似硬度（HK 25 ) 金 50 – 250 钯 75 – 600 铂金 150 – 550 钯镍 300 – 650 铑 750 – 1100 钌 600 – 1300 1.3以国际单位制表示的数值为首选值。括号中提供的值仅供参考。 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和健康实践，并确定监管限制的适用性。

1.1 This specification covers requirements for electrodeposited palladium coatings containing at least 99.7 mass % of palladium metal. Composite coatings consisting of palladium with a thin gold overplate for applications involving electrical contacts are also covered. 1.2 Properties — Palladium is the lightest and least noble of the platinum group metals. It has a specific gravity of 12.0, which is substantially less than gold (19.3) and platinum (21.5). This yields a greater volume or thickness of coating and, consequently, some saving of metal weight accompanied by a small sacrifice in corrosion resistance and reflectivity. The following table compares the hardness range of electrodeposited palladium with other electrodeposited noble metals and alloys (1,2) . Approximate Hardness (HK 25 ) Gold 50 – 250 Palladium 75 – 600 Platinum 150 – 550 Palladium-Nickel 300 – 650 Rhodium 750 – 1100 Ruthenium 600 – 1300 1.3 The values stated in SI units are the preferred values. Values provided 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 and health practices and determine the applicability of regulatory limitations prior to use.