超清版 GB/T 5267.5-2024 紧固件表面处理 第5部分：热扩散渗锌层

ICS 21.060.01
CCS J 13
中华人民共和国国家标准
GB/T 5267.5—2024
紧固件表面处理
第5 部分：热扩散渗锌层
Fasteners surface treatment—Part 5：Zinc thermal diffusion coatings
2024-09-29 发布2025-04-01 实施
国家市场监督管理总局
国家标准化管理委员会发 布

目　　次
前言 ····································································································· Ⅲ
引言 ····································································································· Ⅳ
1 范围 ·································································································· 1
2 规范性引用文件 ······················································································ 1
3 术语和定义 ··························································································· 1
4 渗锌层体系和工艺 ···················································································· 2
5 耐腐蚀性和渗锌层等级 ··············································································· 3
6 尺寸要求和测量 ······················································································ 4
7 机械、物理性能和试验 ··············································································· 5
8 紧固件渗锌层体系标记 ··············································································· 6
9 订货信息 ······························································································ 6
10 储存条件 ···························································································· 6
附录A （资料性） 热扩散渗锌层等级推荐应用 ······················································· 7
参考文献 ·································································································· 8

前　　言
本文件按照GB/T 1.1—2020《标准化工作导则　第1 部分：标准化文件的结构和起草规则》的规
定起草。
本文件是GB/T 5267《紧固件表面处理》的第5 部分。GB/T 5267 已经发布了以下部分：
—GB/T 5267.1　紧固件　电镀层；
—GB/T 5267.2　紧固件　非电解锌片涂层；
—GB/T 5267.3　紧固件　热浸镀锌层；
—GB/T 5267.4　紧固件表面处理　耐腐蚀不锈钢钝化处理；
—GB/T 5267.5　紧固件表面处理　第5部分：热扩散渗锌层。
请注意本文件的某些内容可能涉及专利。本文件的发布机构不承担识别专利的责任。
本文件由中国机械工业联合会提出。
本文件由全国紧固件标准化技术委员会（SAC/TC 85）归口。
本文件起草单位：中机生产力促进中心有限公司、上海高强度螺栓厂有限公司、定西高强度紧固件
股份有限公司、舟山市7412 工厂、绍兴山耐高压紧固件有限公司、山东高强紧固件有限公司、中国电
力科学研究院有限公司、明阳智慧能源集团股份公司、河北信德电力配件有限公司、苏州热工研究院有
限公司、盐城科奥机械有限公司、中广核风电有限公司、浙江烨凌实业有限公司、舟山市正山智能制造
科技股份有限公司、雁栖湖基础制造技术研究院（北京）有限公司、中车青岛四方机车车辆股份有限公
司、江苏中成紧固技术发展股份有限公司、重庆标准件工业有限责任公司、国智科技（河北）股份有限
公司、邯郸市兆运电力紧固件制造有限公司、山东鲁电线路器材有限公司、宁波世裕五金电器有限公
司、杭州华佳标准件有限公司、安徽宏源铁塔有限公司、上海达克罗涂复工业有限公司、宁波市镇海甬
鼎紧固件制造有限公司、株洲春华实业有限责任公司、浙江新盛达金属科技发展股份有限公司、中国第
一汽车股份有限公司、中国汽车技术研究中心有限公司、上海集优张力控制螺栓有限公司、奇瑞汽车股
份有限公司。
本文件由全国紧固件标准化技术委员会负责解释。

引　　言
紧固件表面处理是紧固件生产中重要的环节，根据涂覆层功能可实现紧固件耐腐蚀性、装饰性和功
能性要求。螺纹紧固件在选择表面处理时，不仅要实现各种功能作用，同时还要满足螺纹旋合性要求。
GB/T 5267 旨在规范针对紧固件产品的电镀层、非电解锌片涂层、热浸镀锌层、不锈钢钝化和热扩散渗
锌层等不同表面处理的技术要求，为涂料供应商、涂镀层加工方、紧固件制造者、分销商和最终用户组
织生产、销售和产品质量验收检查提供标准依据，拟由5 个部分构成：
—GB/T 5267.1　紧固件　电镀层（ISO 4042）；
—GB/T 5267.2　紧固件　非