1.1 本规程涵盖了金属精整器清洁指南，然后为使用化学转化涂层的镁和镁合金精整提供油漆基础。在适用的情况下（例如，航空航天），可以使用二次补充涂层（例如，表面密封）（参见 附录X1 ). 1.2 虽然化学转化涂层主要用作油漆的基础，但在储存或在温和暴露条件下使用时，化学转化涂层为暴露在室内空气中的镁零件提供了不同程度的表面保护。一个例子是重铬酸盐处理的广泛使用（参见 5.2 )作为计算机行业压铸镁部件机加工表面的最终涂层。 1.3 涂层的传统编号贯穿始终。 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 本实施规程中所述的工艺清洁并为镁和镁合金的表面处理提供了油漆基础。 使用条件将在一定程度上决定要应用的具体过程。

1.1 This practice covers a guide for metal finishers to clean and then provide a paint base for the finishing of magnesium and magnesium alloys using chemical conversion coatings. Where applicable (for example, aerospace) secondary supplementary coatings (for example, surface sealing) can be used (see Appendix X1 ). 1.2 Although primarily intended as a base for paint, chemical conversion coatings provide varying degrees of surface protection for magnesium parts exposed to indoor atmosphere either in storage or in service under mild exposure conditions. An example is the extensive use of the dichromate treatment (see 5.2 ) as a final coating for machined surfaces of die cast magnesium components in the computer industry. 1.3 The traditional numbering of the coating is used throughout. 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 The processes described in this practice clean and provide a paint base for the finishing of magnesium and magnesium alloys. Service conditions will determine, to some degree, the specific process to be applied.