紧固件. 非电解锌粉覆层系统

[中文适用范围]： 本文件规定了钢紧固件非电解锌片涂层系统的要求。 它适用于涂层： ——含或不含六价铬； ——有或没有面漆； ——带或不带润滑剂（整体润滑剂和/或随后添加的润滑剂）。 它适用于具有ISO公制螺纹的螺栓、螺钉、螺柱和螺母，适用于具有非ISO公制螺纹的紧固件，以及垫圈、销、夹子等非螺纹紧固件。 本文件没有规定此类紧固件的要求性能如可焊性或可涂漆性。 它不适用于机械涂覆的镀锌层。 注：符合本文件的涂层特别用于高强度紧固件（≥ 1000 MPa），以避免内部氢脆风险（IHE — 见 4.4）。 涂层紧固件的设计和组装信息见附件 A。 [外文原描述]： This document specifies requirements for non-electrolytically applied zinc flake coating systems for steel fasteners. It is applicable to coatings: — with or without hexavalent chromium; — with or without top coat; — with or without lubricant (integral lubricant and/or subsequently added lubricant). It is applicable to bolts, screws, studs and nuts with ISO metric thread, to fasteners with non-ISO metric thread, and to non-threaded fasteners such as washers, pins, clips, etc. This document does not specify requirements for such fastener properties as weldability or paintability. It is not applicable to mechanically applied zinc coatings. NOTE Coatings in accordance with this document are especially used for high strength fasteners (≥ 1 000 MPa) to avoid risk of internal hydrogen embrittlement (IHE — see 4.4). Information for design and assembly of coated fasteners is given in Annex A.