螺纹部件.电镀涂层

[中文适用范围]： 本文件规定了对带有电镀涂层和涂层系统的钢紧固件的要求。 与尺寸性能相关的要求也适用于由铜或铜合金制成的紧固件。 它还规定了要求并给出了尽量减少氢脆风险的建议，见 4.4 和附录 B。 它主要适用于带有锌和锌合金涂层系统（锌、锌镍、锌铁）和镉的紧固件，主要用于防腐蚀和其他功能特性： ——带或不带转化涂层， — 带或不带密封剂， — 带或不带面漆， — 带或不带润滑剂（整体润滑剂和/或随后添加的润滑剂）。 其他电镀涂层和涂层系统（锡、锡锌、铜-锡、铜-银、铜、银、铜-锌、镍、镍-铬、铜-镍、铜-镍-铬）的规范包含在本文件仅适用于与 ISO 公制螺纹紧固件相关的尺寸要求。 本文件对电镀紧固件的要求优先于涉及电镀的其他文件。 本文件适用于带 ISO 公制螺纹的钢制螺栓、螺钉、螺柱和螺母，以及其他螺纹紧固件和非螺纹紧固件，例如垫圈、销、夹子和铆钉。 注：电镀也适用于不锈钢紧固件，例如用于润滑以避免磨损。 涂层紧固件的设计和组装信息在附录 A 中给出。 本文件没有规定可焊性或可涂漆性等性能的要求。 [外文原描述]： This document specifies requirements for steel fasteners with electroplated coatings and coating systems. The requirements related to dimensional properties also apply to fasteners made of copper or copper alloys. It also specifies requirements and gives recommendations to minimize the risk of hydrogen embrittlement, see 4.4 and Annex B. It mainly applies to fasteners with zinc and zinc alloy coating systems (zinc, zinc-nickel, zinc-iron) and cadmium, primarily intended for corrosion protection and other functional properties: — with or without conversion coating, — with or without sealant, — with or without top coat, — with or without lubricant (integral lubricant and/or subsequently added lubricant). Specifications for other electroplated coatings and coating systems (tin, tin-zinc, copper-tin, copper-silver, copper, silver, copper-zinc, nickel, nickel-chromium, copper-nickel, copper-nickel-chromium) are included in this document only for dimensional requirements related to fasteners with ISO metric threads. The requirements of this document for electroplated fasteners take precedence over other documents dealing with electroplating. This document applies to steel bolts, screws, studs and nuts with ISO metric thread, to other threaded fasteners and to non-threaded fasteners such as washers, pins, clips and rivets. NOTE Electroplating is also applied to stainless steel fasteners, e.g. for the purpose of lubrication in order to avoid galling. Information for design and assembly of coated fasteners is given in Annex A. This document does not specify requirements for properties such as weldability or paintability.