装饰镀铬质量要求.doc

密级：秘密
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目 录
1. 工艺鉴定要求 6
1.1. 总则 6
1.2. 设计要求 6
1.3。 工艺鉴定程序 6
1。4。 工艺鉴定试验及试样要求 6
1.4.1。 试样要求 6
1。4.2. 试验项目及试样数量 6
1。5. 试验方法及质量指标 7
1。5。1。 外观 7
1.5.2. 镀层厚度 7
1.5。3. 结合强度 7
1。5。4。 耐蚀性 7
1。6。 鉴定状态的保持 7
2。 批生产检验要求 7
2.1。 镀前表面质量要求 7
2。2。 镀层外观 7
2.3。 镀层厚度 8
2。4. 结合强度 8
2.5。 耐蚀性 8
2012-03-20 第6页,共13页Page 6 , Total13

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范 围：
本规范规定了华为技术有限公司产品的钢、铜、锌合金等金属基体零件上镀装饰铬的工艺要求及其质量要求。
本规范适用于装饰镀铬的工艺鉴定和批生产质量检验.
简 介：
本规范分两部分，第一部分“工艺鉴定要求”规定了加工商必须保证的技术管理、工艺设施及产品质量水平要求，用作对供应商进行技术资格认证和首样质量鉴定,是华为对装饰镀铬零件进行质量鉴定的依据;第二部分规定了正常批生产条件下产品质量要求，是生产方控制批生产镀层质量的标准依据，也是产品验收的质量依据。
本文所规定的电镀镍层，与以下标准中的镀层相当：
标准号
标准名
等效的镀层类别
ASTM B 456
Standard Specification for Electrodeposited Coatings of Copper Plus Nickel Plus Chromium and Nickel Plus Chromium
铜+镍+铬及镍+铬的电解沉积镀层标准规范
Service condition number SC 2(Moderate Service）
ISO 1456
Metallic coatings — Electrodeposited coatings of nickel plus chromium and of copper plus nickel plus chromium
Service condition number 2（Moderate）
GB/T 9797
金属覆盖层 镍+铬和铜+镍+铬电镀层
服役条件号2（中度）
HB 5033
镀层和化学覆盖层的选择原则与厚度系列
使用条件II（一般）
SJ 42
金属镀层和化学处理层的分类、特性、应用范围和标记
使用条件 一般 D·L2Cu20/Ni10/Cr0.3
关键词：
镀铬，镀层，耐蚀性
引用文件：
下列文件中的条款通过本规范的引用而成为本规范的条款.凡是注日期的引用文件，其随后所有的修改单（不包括勘误的内容）或修订版均不适用于本规范,然而，鼓励根据本规范达成协议的各方研究是否可使用这些文件的最新版本.凡是不注日期的引用文件，其最新版本适用于本规范。
序号
文件编号
文件名称
等效标准
1.
IEC60950—22
Information technology equipment- Safety— Equipment to be installed outdoors
UL60950-22
EN60950—22
2。
ISO 1463
金属和氧化物覆盖层 覆盖层厚度的测定 显微法
GB/T 6462
3.
ISO 2177
金属覆盖层 覆盖层厚度的测量 阳极溶解库仑法
GB/T 4955
4.
ISO 2819
金属基体上金属覆盖层（电沉积层和化学沉积层)附着强度试验方法
GB/T 5270
5.
ISO 4042
紧固件.电镀层
GB/T 5267.1
6.
ISO 9227
人工气候腐蚀试验 盐雾试验
GB/T 10125
7
DKBA0.400。0021
产品表面外观缺陷的限定标准

术语和定义：
术语
定义
局部厚度
在规定区域内进行规定次数厚度测量的算术平均值
主视表面
零件在装配成完整产品后处于正常视觉范围内的可见表面
生产批
指同一天在相同条件下处理的、材料和形状相似的零件的总和
1. 工艺鉴定要求
1.1. 总则
在对供应商进行工艺技术资格认证时、或者供应商有新产品首次生产时必须按本节要求进行工艺质量鉴定。原则上，已经鉴定过的材料、工艺只需要提供相关报告.生产者的工艺质量必须满足第1节的要求。
生产者的工艺设备、工艺流程、质量保证措施应在其主要的工艺文件中加以说明。
1.2. 设计要求
按本规范要求进行的装饰镀铬工艺，对钢铁基体必须是电镀铜－镍－铬的工艺。生产者应保持并遵守经华为技术有限公司（以下简称“华为”）正式批准的工艺和检验文件。
1.3. 工艺鉴定程序
被鉴定的工厂必须完成以下全部试验工作，这些试验必须在零件批生产所用的条件下完成：
试样加工 （注1)
表面处理 （注2）
试样检查及测试
提供试验报告（注3）及试片给华为技术有限公司以便复验。
注:1、鉴定用试样也可由华为技术有限公司完成并提供给被鉴定工厂。
2、所有试样必须同时进行处理。
3、试验报告的发出者必须是华为技术有限公司质量鉴定部门认可的试验室或单位.
1.4. 工艺鉴定试验及试样要求
1.4.1. 试样要求
材料: 冷轧钢
尺寸： 80×125×1 ～ 4 (mm） 或 φ10 ~20 ×125（mm）
表面粗糙度： Ra ≤ 0.8 μm
表面处理： 镀铜 ＋镍＋铬
1.4.2. 试验项目及试样数量
下表给出了工艺鉴定所需的试验项目和试样数量要求：
试验项目
试样数量(件）
外观
所有试样
镀层厚度
3
结合强度
3
耐蚀性
铜加速乙酸盐雾试验
3+3 ① （仅对室内应用的零件）
二氧化硫盐雾试验
3+3 ②（仅对室外外壳上的零件）
注：①② 其中三件为提供华为技术有限公司进行复验用.
1.5. 试验方法及质量指标
1.5.1. 外观
1）所有试样均应按下列方法进行外观检查。
在自然光或光照度在300—600LX的近似自然光下(如40W日光灯、距离500mm处）,相距为200mm～350mm的距离下进行正常检验，也可以使用放大镜进行参考检验.为了防止试件反射，影响正常视线,允许用半透明白光纸，隔开光源进行检验。
2）镀层应是光亮、稍带有浅蓝色的亮白色，且结晶均匀、细致。
3）允许在非工作面有夹具印。
4）主视表面不允许有起泡、麻点、粗糙、脱落、分层、斑点、黑点、裂纹、针孔、起皮、发雾、局部无镀层、污迹或变色等缺陷。
1.5.2. 镀层厚度
1）按ISO 2177 在三个试样上进行厚度检测，分别测量铜、镍及铬层厚度。(有争议时，用库仑法测量铬层厚度,按ISO 1463 用显微镜法测量镍和铜层厚度.)
2）每一试样的镀层总厚度应为 30－40 μm，其中铜镀层为 20－25 μm、镍镀层为10－15 μm、铬镀层不低于 0.3 μm。
1.5.3. 结合强度
1）在三件试样上进行镀层的结合强度试验.
2）按 ISO 2819 的“挫刀试验"方法进行检测，每一试样上镀层与基体、镀层与镀层之间应结合良好,没有任何分离现象.
1.5.4. 耐蚀性
1）在试样上进行试验。
2）对产品内部应用的零件生产：按ISO 9227 方法进行8小时的 CASS 试验（铜加速乙酸盐雾试验)；试验后，在试样边缘以外的表面不能出现基体腐蚀现象.
3）对户外产品外表面应用的零件生产：按IEC60950-22第8.3节的规定进行24天二氧化硫盐雾试验，试验后,在试样表面不允许出现黑点、绿点、或白色物质等基材腐蚀现象。
1.6. 鉴定状态的保持
经过华为公司鉴定的工艺，在未得到华为的同意之前，不能改变任何可影响性能质量的工艺参数，否则将重新进行鉴定。。
2. 批生产检验要求
2.1. 镀前表面质量要求
1）应无严重油污、金属屑、锈蚀和氧化皮等；
2）零件表面应无毛刺、裂纹、压坑等因操作不良而导致的人为损伤；表面划伤不能超出DKBA0。400.0021 要求；
3）装饰表面必须经过机械抛光（或其它等效的方法）处理,其表面粗糙度应为Ra≤0.8.
2.2. 镀层外观
1）所有试样均应按下列方法进行外观检查.
在自然光或光照度在300—600LX的近似自然光下（如40W日光灯、距离500mm处)，相距为200mm～350mm的距离下进行正常检验，也可以使用放大镜进行参考检验。为了防止试件反射，影响正常视线，允许用半透明白光纸，隔开光源进行检验。
2）镀层应是光亮、稍带有浅蓝色的亮白色，且结晶均匀、细致、光滑、连续.
3）允许在非工作面有夹具印。
4）主视表面不允许有起泡、麻点、粗糙、脱落、分层、斑点、黑点、裂纹、针孔、起皮、发雾、局部无镀层（盲孔内、以及深度大于直径的孔内部分除外)、污迹或变色等缺陷。
2.3. 镀层厚度
1）按ISO 2177 进行厚度检测、也可利用X射线镀层分析仪进行测试。厚度检查在零件上进行;每批零件都需检测.分别测量铜、镍及铬层厚度。
2)对钢铁、铝或锌合金零件表面:凡能被直径为 20 mm 的球接触到的区域，其局部总厚度必须达到 30 μm以上，其中铜镀层为 20－25 μm、镍镀层为10－15 μm、铬镀层不低于 0。3μm；盲孔内、以及深度大于直径或开口宽度的部分不规定厚度。
3）对铜合金零件表面：凡能被直径为 20 mm 的球接触到的区域，镍镀层为15－20 μm、铬镀层不低于 0.3 μm；盲孔内、以及深度大于直径或开口宽度的部分不规定厚度。
4）凡直径为 20 mm 的球不能接触到的区域，其厚度不作要求。
5)对螺纹紧固件：其镀层厚度必须符合图纸或 GB/T 5267.1 中的要求，大致如下表所示；其厚度检测方法按 ISO 4042的相关内容进行。
螺纹公称直径（mm）
≤2。5
3~8
10～12
14~22
镀层厚度(μm）
3
5
8
10
2.4. 结合强度
1）每批至少检查一件试样(试样要求见 1。4.1 节）或样件。
2)按ISO 2819 的“锉刀试验"方法进行检测，镀层与基体、镀层与镀层之间应结合良好,没有任何分离现象.
3）对螺纹紧固件不要求此项内容。
2.5. 耐蚀性
1）每批至少检查一件零件。
2）按ISO 9227方法进行 8H 的 CASS 试验（铜加速乙酸盐雾试验）;试验后,在零件表面不能出现基体腐蚀迹象（白色、红色、绿色或黑色），但以下情况除外：
a、允许在螺纹部位出现有基材的腐蚀现象。
b、在深凹结构(深度大于开口宽度）底部，允许出现有不多于3个的腐蚀点，每个腐蚀点的直径规定为：钣金或型材零件不大于0。5mm，铸件不大于1.0mm。
c、在零件其它的结构棱边、角上,铸件零件允许出现不多于3个的腐蚀点,每个腐蚀点的直径不大于1.0mm；钢、铜零件不允许出现腐蚀。
3)满足耐蚀性要求的零件，在镀层厚度方面可以不强制要求符合2.3节。

confidentiality level: confidential
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TABLE OF CONTENTS
1 REQUIREMENTS FOR PROCESS AUTHENTICATION 12
1。1 General Principles 12
1。2 Design Requirement 12
1.3 Qualification Procedure 12
1.4 Definition of Tests and Test Specimens 12
1.4.1 Test specimens 12
1。4.2 Test Items and Sample Quantity 12
1.5 Test Methods and Quality Requirement 13
1.5。1 Appearance 13
1。5.2 Coat Thickness 13
1。5.3 Bonding Strength 13
1.5。4 Corrosion Resistance 13
1.6 Maintenance of Qualification State 14
2 REQUIREMENTS FOR BATCH PRODUCTION 14
2。1 Pre—Electroplating Surface Quality Requirements 14
2。2 Appearance 14
2。3 Coat Thickness 14
2.4 Bonding Strength 15
2。5 Corrosion Resistance 15
2012-03-20 i Confidential 第13页,共13页Page 13 , Total13

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Scope
This document defines Huawei’s process requirements and quality requirements for electroplating decorative chrome on such metallic matrixes as steel、copper and zinc alloy.
The technical specifications are applicable to chromeplating process appraisal and quality inspection for batch production.
Brief introduction
This specification includes two parts. Part 1 is Requirements for Process Authentication， which defines that the producer must assure the quality of technical management , equipment and product. We authenticate the technical qualification and the quality of the first specimen using the specification， which is the authentication evidence of nickel—plating part of HUAWEI. The part 2 defines the quality requirement of the product in common series production, which is the evidence for the quality control of series production, also, is the quality evidence of product admittance。
Key words
Chrome Plating，coat,corrosion resistance
Referenced Documents
The following normative documents contain provisions which， through reference in this text, constitute provisions of this specification。 For dated references, subsequent amendments, excluding corrections， to, or revisions of， any of these publications do not apply. However, parties to agreements based on this specification are encouraged to investigate the possibility of applying the most recent editions of the normative documents. For undated references， the latest edition of the normative document referred to applies.
No.
Doc No。
Doc Title
Equivalent
1。
IEC60950-22
Information technology equipment— Safety—Equipment to be installed outdoors
UL60950-22
EN60950-22
2.
ISO 1463
Metallic and oxide coatings —— Measurement of coating thickness —— Microscopical method
GB/T 6462
3.
ISO 2177
Metallic coatings — Measurement of coating thickness - Coulometric method by anodic dissolution
GB/T 4955
4.
ISO 2819
Metallic coatings on metallic substrates — Electrodeposited and chemically deposited coatings — Review of methods available for testing adhesion
GB/T 5270
5.
ISO 4042
Fasteners-Electroplated coatings
GB/T 5267.1
6.
ISO 9227
Corrosion tests in artificial
atmospheres - Salt spray tests
GB/T 10125
7
DKBA0。400.0021
Cosmetic Standard for Product Surfaces

Term＆Definition
Term
Definition
Local thickness
The arithmetic mean value of the thickness measured in specified number of times and specified area.
main-view surface
The visible surface within the normal visual field when the parts have been assembled into integral products。
Batch
The totaling of parts with similar material and shape treated in the same day under the same condition。
1 Requirements for Process Authentication
1.1 General Principles
The process authentication must be carried out for supplier according to requirements described in this chapter when competence of the supplier is being authenticated or the new products are being manufactured. equipment and quality meet the requirements in section 1。
Producer shall explain the equipment used, the process flow and the quality control measures in the main process documents。 Producer shall ensure that their processes.
1.2 Design Requirement
As stipulated by the technical specifications herein, the steel ＆ iron matrix must undergo the following process： electroplate copper, nickel, and chrome. The producer should abide by the process documents and inspection documents approved by Huawei officially。
1.3 Qualification Procedure
The factory to be appraised should complete all the following tests upon condition that the parts are produced in batches.
l Sample processing （Note 1）
l Surface treatment （Note 2)
l Sample inspection and test
The test report （for details, see Note 3） and test pieces should be provided to Huawei for the purpose of reinspection.
Note 1: The test pieces can be arranged and provided by Huawei for the factory。
Note 2： All samples must be processed at a time.
Note 3： The test report must be released by a laboratory or institution recognized by Huawei’s quality appraisal department.
1.4 Definition of Tests and Test Specimens
1.4.1 Test specimens
Material： 20 Cold rolled steel
Size： 80 × 125 × 1 to 4 (mm） or φ 10 to 20 × 125 （mm）
Surface roughness： Ra ≤ 0。8 mm
Surface Treatment: Electroplate copper， nickel, and chrome.
1.4.2 Test Items and Sample Quantity
Following table shows requirements for test items and sample quantity in process qualification.
Test Items
Sample Quantity
Appearance
All samples
Thickness of coating
3
Binding strength
3
Corrosion resistance
copper accelerated acetic acid salt spray test
3+3 ① （only for the part indoor using)
SO2 salt spray test
3+3 ②（only for the part outdoor using)
notes:①②Three samples are provided to Huawei for the purpose of reinspection.
1.5 Test Methods and Quality Requirement
1.5.1 Appearance
a） All the test specimens must go through visual examination as follow：
The test specimens must be checked up in natural beam or similar beam with luminosity between 300~600LX, such as the 40W fluorescent lamp with distance 500mm。 The visual distance is between 200～350mm. Also you can use the magnifier for reference。 In case of specimens reflection for our judgement， the semi- transparent white-light paper can be used to space out the disturbance of lamp-house.
2）The coating should be lustrous with a little light blue, and the crystallization should be even and tiny.
3)Clamp marks are allowed in a non-working surface。
4)The following flaws are not allowed in the primary vision surface: bubble， pocking mark， roughness， fall-off, delamination， spot, macula， crackle, pinhole， peeling, mould， no coating locally, stain， and discoloration。
1.5.2 Coat Thickness
1)Measure the thickness of three samples in accordance with ISO 2177, and measure the thickness of the copper coating, nickel coating, and chrome coating respectively. (in case of controversy, measure the thickness of the chrome coating through the coulometry, and measure the thickness of the nickel coating and copper coating respectively through a microscope in accordance with ISO 1463)
2）For each sample, the total thickness of the coatings should be 30 to 40 mm。 Specifically speaking， the copper coating is 20 to 25 mm in thickness, the nickel coating is 10 to 15 mm in thickness, and the chrome coating is at least 0。3 mm in thickness.
1.5.3 Bonding Strength
1)Test the bonding strength of the coatings for the three samples。
2）Use the file test methodology as described in ISO 2819。 In each sample, the coatings should be bound to the matrix well and the coatings should also be bound to each other。
1.5.4 Corrosion Resistance
1）Three samples undergo the corrosion-resistance test.
2）For the production inside using, Conduct an eight—hour copper-accelerated acetic acid-salt spray testing （CASS test) in accordance with ISO 9227。 After the test is complete， no matrix should be corroded in the surface beyond the edge of the sample。.
3)For the outdoor production outside using, Conduct an 24—days SO2 salt spray testing in accordance with IEC60950—22 issue 8。3。 After the test is complete, no matrix should be corroded with black、green or white spots in the surface .
1.6 Maintenance of Qualification State
Without prior consent of Huawei’s process department or quality inspection department, do not modify the process parameters of any process appraised by Huawei, which may affect its performance quality. Otherwise, the process has to be appraised again。
2 Requirements for Batch Production
2.1 Pre-Electroplating Surface Quality Requirements
1）No serious oil stain， metal particles, rust, or oxide skin is allowed。
2）Various misoperations—caused damages （burr, crackle, or indentation) are not allowed in the surface of every part。 The superficial scratch should not exceed the range allowed by DKBA0.400。0021。
3）The decorative surface should undergo the mechanical polishing treatment (or equivalent)， and the surface roughness Ra should be not higher than 0。8。
2.2 Appearance
1) All the test specimens must go through visual examination as follow：
The test specimens must be checked up in natural beam or similar beam with luminosity between 300～600LX， such as the 40W fluorescent lamp with distance 500mm。 The visual distance is between 200～350mm。 Also you can use the magnifier for reference. In case of specimens reflection for our judgement, the semi— transparent white—light paper can be used to space out the disturbance of lamp-house。
2）The coating should be lustrous with a little light blue， and the crystallization should be even， tiny, sleek, and continuous.
3）Clamp marks are allowed in a non—working surface。
4）The following flaws are not allowed in the primary vision surface： bubble， pocking mark, roughness, fall—off, delamination， spot， macula， crackle， pinhole， peeling, mould， no coating locally （except in a blind hole or in a hole with its depth greater than its diameter）, stain, and discoloration。
2.3 Coat Thickness
1）Measure the thickness of the samples respectively in accordance with ISO 2177 or by using an X-ray coating analyzer. Thickness measurement is made in the parts. Every batch of parts should be measured。 The thickness of the copper coating, nickel coating, and chrome coating should be measured respectively.
2)For the surface of th