BS 7371-3-2009 金属紧固件镀层.第3部分:镀锌涂层规范

标准号：BS 7371-3-2009
中文标准名称：金属紧固件镀层.第3部分:镀锌涂层规范
英文标准名称：Coatings on metal fasteners – Part 3: Specifications for electroplated zinc coatings
标准类型：J13
发布日期：2009/8/31 12:00:00
实施日期：2009/8/31 12:00:00
中国标准分类号：J13
国际标准分类号：21.060.01;25.220.40
引用标准：BS 3643-1;BS 3643-2;BS 7371-1;BS EN ISO 2177;BS EN ISO 2819;BS EN ISO 3497;BS EN ISO 3882;BS EN ISO 9227
适用范围：This Part of BS 7371 specifies requirements for coatings applied by theelectrolysis of solutions of zinc.NOTE The coatings consist principally of zinc and can be lubricated togive controlled torque/clamping force properties when required (see, forexample, BS 7371-2).In addition to the requirements in this Part of BS 7371, the requirementsin BS 7371-1 which are applicable to zinc electroplated coatings apply.This Part of BS 7371 also specifies requirements for:a) the coating thickness;b) the type of conversion treatment or topcoat to be applied;c) quality assessment of the corrosion resistance of unused coatedparts when subjected to neutral salt spray testing (for exampleBS EN ISO 9227); andd) an adhesion test.Zinc electroplated coatings covered by this Part of BS 7371 are for useon fasteners and accessories where the following apply:1) A coating giving galvanic protection is required for ferrousfasteners.2) A substrate is required to improve the corrosion resistance ofsubsequent coatings on ferrous fasteners, e.g. organic.3) The risk of hydrogen embrittlement of high tensile steel fastenersis acceptable.