装饰镀铬质量要求

1、目 录1.工艺鉴定要求61.1.总则61.2.设计要求61.3.工艺鉴定程序61.4.工艺鉴定试验及试样要求61.4.1.试样要求61.4.2.试验项目及试样数量61.5.试验方法及质量指标71.5.1.外观71.5.2.镀层厚度71.5.3.结合强度71.5.4.耐蚀性71.6.鉴定状态的保持72.批生产检验要求72.1.镀前表面质量要求72.2.镀层外观72.3.镀层厚度82.4.结合强度82.5.耐蚀性8Error! Reference source not found.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

2、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 456Standard Specification for Electrodeposited Coatings of Copper Plus Nickel Plus Chromium

3、 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 1456Metallic coatings Electrodeposited coatings of nickel plus chromium and of copper plus nickel plus chromiumService 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

4、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.IEC60950-22Information technology equipment- Safety- Equipment

5、to be installed outdoorsUL60950-22EN60950-222.ISO 1463金属和氧化物覆盖层 覆盖层厚度的测定 显微法GB/T 64623.ISO 2177金属覆盖层 覆盖层厚度的测量 阳极溶解库仑法GB/T 49554.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 52705.ISO 4042紧固件.电镀层GB/T 5267.16.ISO 9227人工气候腐蚀试验 盐雾试验GB/T 101257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

6、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

7、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 10 20 ×125(mm)表面粗糙度： Ra 0.8 m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

8、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 （仅对室内应用的零件）二氧化硫盐雾试验3+3 （仅对室外外壳上的零件）注： 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200mm350mm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、

9、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 3040 m，其中铜镀层为 2025 m、镍镀层为1015 m、铬镀层不低于 0.3 m。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

10、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

11、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Ra0.8。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200mm350mm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

12、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 m以上，其中铜镀层为 2025 m、镍镀层为1015 m、铬镀层不低于 0.3m；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 2

13、0 mm 的球接触到的区域，镍镀层为1520 m、铬镀层不低于 0.3 m；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)2.53810121422镀层厚度(m)358102.4. 结合强度1）每批至少检查一件试样（试样要求见 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

14、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

15、。TABLE OF CONTENTS1REQUIREMENTS FOR PROCESS AUTHENTICATION121.1General Principles121.2Design Requirement121.3Qualification Procedure121.4Definition of Tests and Test Specimens12Test specimens12Test Items and Sample Quantity121.5Test Methods and Quality Requirement13Appearance13Coat Thickness13Bondin

16、g Strength13Corrosion Resistance131.6Maintenance of Qualification State142REQUIREMENTS FOR BATCH PRODUCTION142.1Pre-Electroplating Surface Quality Requirements142.2Appearance142.3Coat Thickness142.4Bonding Strength152.5Corrosion Resistance15Error! Reference source not found. ScopeThis document defin

17、es Huaweis 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 introductionThis sp

18、ecification 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

19、 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 wordsChrome Plating，coa

20、t，corrosion resistanceReferenced DocumentsThe 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

21、 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 TitleEquivalent1.IE

22、C60950-22Information technology equipment- SafetyEquipment to be installed outdoorsUL60950-22EN60950-222.ISO 1463Metallic and oxide coatings - Measurement of coating thickness - Microscopical methodGB/T 64623.ISO 2177Metallic coatings - Measurement of coating thickness - Coulometric method by anodic

23、 dissolutionGB/T 49554.ISO 2819Metallic coatings on metallic substrates - Electrodeposited and chemically deposited coatings - Review of methods available for testing adhesionGB/T 52705.ISO 4042Fasteners-Electroplated coatingsGB/T 5267.16.ISO 9227Corrosion tests in artificialatmospheres Salt spray t

24、estsGB/T 101257Cosmetic Standard for Product SurfacesTerm&DefinitionTermDefinitionLocal thicknessThe arithmetic mean value of the thickness measured in specified number of times and specified area.main-view surfaceThe visible surface within the normal visual field when the parts have been assemb

25、led into integral products.BatchThe totaling of parts with similar material and shape treated in the same day under the same condition.1 Requirements for Process Authentication1.1 General PrinciplesThe process authentication must be carried out for supplier according to requirements described in thi

26、s 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 s

27、hall ensure that their processes.1.2 Design RequirementAs 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 b

28、y 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) an

29、d 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 Huaweis q

30、uality appraisal department.1.4 Definition of Tests and Test Specimens1.4.1 Test specimensMaterial: 20 Cold rolled steel Size: 80 × 125 × 1 to 4 (mm) or 10 to 20 × 125 (mm) Surface roughness: Ra 0.8 mmSurface Treatment: Electroplate copper, nickel, and chrome.1.4.2 Test Items and Samp

31、le QuantityFollowing table shows requirements for test items and sample quantity in process qualification.Test ItemsSample QuantityAppearance All samples Thickness of coating 3Binding strength 3Corrosion resistancecopper accelerated acetic acid salt spray test3+3 （only for the part indoor using）SO2

32、salt spray test3+3 （only for the part outdoor using）notes：Three samples are provided to Huawei for the purpose of reinspection.1.5 Test Methods and Quality Requirement1.5.1 Appearancea) All the test specimens must go through visual examination as follow:The test specimens must be checked up in natur

33、al beam or similar beam with luminosity between 300600LX, such as the 40W fluorescent lamp with distance 500mm. The visual distance is between 200350mm. Also you can use the magnifier for reference. In case of specimens reflection for our judgement, the semi- transparent white-light paper can be use

34、d 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, roughn

35、ess, fall-off, delamination, spot, macula, crackle, pinhole, peeling, mould, no coating locally, stain, and discoloration.1.5.2 Coat Thickness1）Measure the thickness of three samples in accordance with ISO 2177, and measure the thickness of the copper coating, nickel coating, and chrome coating resp

36、ectively. (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

37、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 Strength1）Test the bonding strength of the coatings for the three samples.2）Use the file test methodol

38、ogy 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 Resistance1）Three samples undergo the corrosion-resistance test.2）For the production inside using, Conduct an eight-hour copper-accelerate

39、d 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

40、.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 StateWithout prior consent of Huaweis process department or quality inspection department, do not modify the process parameters of any process appraised by Hu

41、awei, which may affect its performance quality. Otherwise, the process has to be appraised again.2 Requirements for Batch Production2.1 Pre-Electroplating Surface Quality Requirements1）No serious oil stain, metal particles, rust, or oxide skin is allowed.2）Various misoperations-caused damages (burr,

42、 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

43、.2.2 Appearance1) 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 300600LX, such as the 40W fluorescent lamp with distance 500mm. The visual distance is between 200350mm. Also you can us

44、e 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 continu

45、ous.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

46、greater than its diameter), stain, and discoloration.2.3 Coat Thickness1）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 copp

47、er 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 m in any area accessible to a ball with a diameter of 20 mm (specifically speaking, the copper coating

48、 is 20 to 25 mm in thickness, the nickel coating is 10 to 15 m in thickness, and the chrome coating is at least 0.3 m 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

49、alloy: For the area accessible to the ball with a diameter of 20mm, the nickel coating should be 15 to 20 m in thickness, and the chrome coating should be at least 0.3 m 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