装饰镀铬质量标准要求

目录
1.工艺鉴定要求 (4)
1.1.总则 (4)
1.2.设计要求 (4)
1.3.工艺鉴定程序 (4)
1.4.工艺鉴定试验及试样要求 (4)
1.4.1.试样要求 (4)
1.4.2.试验项目及试样数量 (4)
1.5.试验方法及质量指标 (5)
1.5.1.外观 (5)
1.5.2.镀层厚度 (5)
1.5.3.结合强度 (5)
1.5.4.耐蚀性 (5)
1.6.鉴定状态的保持 (5)
2.批生产检验要求 (5)
2.1.镀前表面质量要求 (5)
2.2.镀层外观 (5)
2.3.镀层厚度 (6)
2.4.结合强度 (6)
2.5.耐蚀性 (6)
错误!未找到引用源。

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。

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
术语和定义：
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
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
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。

TABLE OF CONTENTS
1REQUIREMENTS FOR PROCESS AUTHENTICATION (10)
1.1G ENERAL P RINCIPLES (10)
1.2D ESIGN R EQUIREMENT (10)
1.3Q UALIFICATION P ROCEDURE (10)
1.4D EFINITION OF T ESTS AND T EST S PECIMENS (10)
1.4.1Test specimens (10)
1.4.2Test Items and Sample Quantity (10)
1.5T EST M ETHODS AND Q UALITY R EQUIREMENT (11)
1.5.1Appearance (11)
1.5.2Coat Thickness (11)
1.5.3Bonding Strength (11)
1.5.4Corrosion Resistance (11)
1.6M AINTENANCE OF Q UALIFICATION S TATE (12)
2REQUIREMENTS FOR BATCH PRODUCTION (12)
2.1P RE-E LECTROPLATING S URFACE Q UALITY R EQUIREMENTS (12)
2.2A PPEARANCE (12)
2.3C OAT T HICKNESS (12)
2.4B ONDING S TRENGTH (13)
2.5C ORROSION R ESISTANCE (13)
错误!未找到引用源。

Scope
This d ocument 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.
Term&Definition
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.
●Sample processing (Note 1)
●Surface treatment (Note 2)
●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 m
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.
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 μm. Specifically speaking, the copper coating is 20 to 25 μm in thickness, the nickel coating is 10 to 15 μm in thickness, and the chrome coating is at least 0.3 μm 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 p rocess 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 the parts made of steel & iron or zinc alloy, the total local thickness should be at least
30 μm in any area accessible to a ball with a diameter of 20 mm (specifically speaking, the copper coating
is 20 to 25 m in thickness, the nickel coating is 10 to 15 μm in thickness, and the chrome coating is at least 0.3 μm in thickness). No specific thickness is required in a blind hole or in a hole with its depth greater than its diameter or opening width.
3）For the surface of the parts made of copper alloy: For the area accessible to the ball with a diameter of 20mm, the nickel coating should be 15 to 20 μm in thickness, and the chrome coating should be at least
0.3 μm in thickness. No specific thickness is required in a blind hole or in a hole with its depth greater than
its diameter or opening width.
4）No specific thickness is required in an area that is not accessible to a ball with a diameter of 20 mm.
5）For a threaded fastener, the thickness of coatings must come up to the requirements stipulated in the design drawing or ISO 4042, as described in the following table. The thickness can be measured by using
a method stipulated in ISO 4042.
2.4 Bonding Strength
1）Among every batch of parts, at least one sample or test piece (for details on its requirements, refer to Section 错误!未找到引用源。

) should be tested.
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.
3）No such requirements are placed upon the threaded fasteners.
2.5 Corrosion Resistance
1）At least one test specimen should be checked each batch.
2）Following a CASS test of 8 hours(copper accelerated acetic acid salt spray test as per ISO 9227), no base corrosion phenomenon with white、red、green or black spots must be detected. The following defects are allowed:
a、base corrosion phenomenon on screw thread;
b、less than 3 spots corrosion are allowed in the bottom of concave machinery, and the specific diameter
of the spots is less than 0.5mm for sheet and profile parts and less than 1.0mm for casting parts.
c、On the edges and corners, the corrosion is allowed less than 3 spots for the casting parts with the
diameter less than 1.0mm, but any corrosion is not allowed for steel and copper parts.
3）The requirement of coat thickness is not specified according to section 2.3 when the part meets the Corrosion Resistance specification.。