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

J13

中华人民共和国国家标准

GB/T5267.5—2024

紧固件表面处理

第5部分：热扩散渗锌层

Fastenerssurfacetreatment—Part5：Zincthermaldiffusioncoatings

2024-09-29发布2025-04-01实施

国家市场监督管理总局发布

国家标准化管理委员会

GB/T5267.5—2024

目次

前言

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Ⅲ

引言

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Ⅳ

1

范围

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1

2

规范性引用文件

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1

3

术语和定义

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1

4

渗锌层体系和工艺

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2

5

耐腐蚀性和渗锌层等级

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3

6

尺寸要求和测量

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4

7

机械、物理性能和试验

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5

8

紧固件渗锌层体系标记

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6

9

订货信息

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6

10

储存条件

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6

附录A（资料性）

热扩散渗锌层等级推荐应用

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7

参考文献

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8

Ⅰ

GB/T5267.5—2024

前言

本文件按照GB/T1.1—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/T5267《紧固件表面处理》的第5部分。GB/T5267已经发布了以下部分：

—GB/T5267.1紧固件电镀层；

—GB/T5267.2紧固件非电解锌片涂层；

—GB/T5267.3紧固件热浸镀锌层；

—GB/T5267.4紧固件表面处理耐腐蚀不锈钢钝化处理；

—GB/T5267.5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/TC85）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。

Ⅲ

GB/T5267.5—2024

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/T5267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/T5267.1紧固件电镀层（ISO4042）；

—GB/T5267.2紧固件非电解锌片涂层(ISO10683)；

—GB/T5267.3紧固件热浸镀锌层(ISO10684)；

—GB/T5267.4紧固件表面处理耐腐蚀不锈钢钝化处理(ISO16048)；

—GB/