1.1 本指南旨在帮助建立和维护用于电镀和转化涂层的锌合金压铸件的制备程序。主要用于制备合金UNS Z33521（AG-40A）和UNS Z35530（AC-41A）（规范 B86型 )用于铜、镍和铬电镀（规范 B456 ). 1.2 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。 1.3 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。 1.4 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 电镀或转化涂层锌合金压铸件的性能和质量取决于表面清洁度和条件。在锌合金上电镀各种金属或建立转化涂层，用于装饰或工程表面处理。常用的电镀通常是用于装饰和功能用途的铜、镍和铬。 常用的转化涂层是磷酸盐、铬酸盐和阳极氧化涂层。锌压铸件上的电镀锌压铸件和转换涂层用于许多行业，如船舶、汽车、卫浴装置和家电行业。

1.1 This guide is intended as an aid in establishing and maintaining a procedure for preparing zinc alloy die castings for electroplating and conversion coatings. It is primarily intended for the preparation of Alloys UNS Z33521 (AG-40A) and UNS Z35530 (AC-41A) (Specification B86 ) for electroplating with copper, nickel, and chromium (Specification B456 ). 1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.3 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. 1.4 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 The performance and quality of electroplated or conversion-coated zinc alloy die casting depends upon the surface cleanliness and condition. Various metals are electroplated or conversion coatings are established on zinc alloys for decorative or engineering finish. The common electroplates applied are usually copper, nickel, and chromium for decorative and functional uses. The common conversion coatings applied are phosphates, chromates, and anodized coatings. Electroplated zinc die castings and conversion coatings on zinc die castings are used in many industries such as the marine, automotive, plumbing fixtures, and appliance industries.