ImageVerifierCode 换一换
格式:PDF , 页数:11 ,大小:182.57KB ,
资源ID:461279      下载积分:10000 积分
快捷下载
登录下载
邮箱/手机:
温馨提示:
如需开发票,请勿充值!快捷下载时,用户名和密码都是您填写的邮箱或者手机号,方便查询和重复下载(系统自动生成)。
如填写123,账号就是123,密码也是123。
特别说明:
请自助下载,系统不会自动发送文件的哦; 如果您已付费,想二次下载,请登录后访问:我的下载记录
支付方式: 支付宝扫码支付 微信扫码支付   
注意:如需开发票,请勿充值!
验证码:   换一换

加入VIP,免费下载
 

温馨提示:由于个人手机设置不同,如果发现不能下载,请复制以下地址【http://www.mydoc123.com/d-461279.html】到电脑端继续下载(重复下载不扣费)。

已注册用户请登录:
账号:
密码:
验证码:   换一换
  忘记密码?
三方登录: 微信登录  

下载须知

1: 本站所有资源如无特殊说明,都需要本地电脑安装OFFICE2007和PDF阅读器。
2: 试题试卷类文档,如果标题没有明确说明有答案则都视为没有答案,请知晓。
3: 文件的所有权益归上传用户所有。
4. 未经权益所有人同意不得将文件中的内容挪作商业或盈利用途。
5. 本站仅提供交流平台,并不能对任何下载内容负责。
6. 下载文件中如有侵权或不适当内容,请与我们联系,我们立即纠正。
7. 本站不保证下载资源的准确性、安全性和完整性, 同时也不承担用户因使用这些下载资源对自己和他人造成任何形式的伤害或损失。

版权提示 | 免责声明

本文(ASTM B456-2011 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》.pdf)为本站会员(rimleave225)主动上传,麦多课文库仅提供信息存储空间,仅对用户上传内容的表现方式做保护处理,对上载内容本身不做任何修改或编辑。 若此文所含内容侵犯了您的版权或隐私,请立即通知麦多课文库(发送邮件至master@mydoc123.com或直接QQ联系客服),我们立即给予删除!

ASTM B456-2011 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》.pdf

1、Designation: B456 11Standard Specification forElectrodeposited Coatings of Copper Plus Nickel PlusChromium and Nickel Plus Chromium1This standard is issued under the fixed designation B456; the number immediately following the designation indicates the year oforiginal adoption or, in the case of rev

2、ision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.1. Scope1.1 This specification

3、 covers requirements for several typesand grades of electrodeposited copper plus nickel plus chro-mium or nickel plus chromium coatings on steel, nickel pluschromium coatings on copper and copper alloys, nickel pluschromium coatings on Type 300 and 400 series stainless steeland copper plus nickel pl

4、us chromium coatings on aluminumand its alloys and zinc alloys for applications where bothappearance and protection of the basis metal against corrosionare important. Five grades of coatings are provided to corre-spond with the service conditions under which each is expectedto provide satisfactory p

5、erformance: namely, extended verysevere, very severe, severe, moderate, and mild. Definitionsand typical examples of these service conditions are providedin Appendix X1.1.2 This specification does not cover the requirements forthe plating on plastics, see Specification B604.1.3 The following hazards

6、 caveat pertains only to the testmethods portions, Appendix X2, Appendix X3, Appendix X4,and Appendix X5 of this specification: This standard does notpurport to address all of safety concerns, if any, associatedwith its use. It is the responsibility of the user of this standardto establish appropria

7、te safety and health practices anddetermine the applicability of regulatory limitations prior touse.2. Referenced Documents2.1 ASTM Standards:2B183 Practice for Preparation of Low-Carbon Steel forElectroplatingB242 Guide for Preparation of High-Carbon Steel for Elec-troplatingB252 Guide for Preparat

8、ion of Zinc Alloy Die Castings forElectroplating and Conversion CoatingsB253 Guide for Preparation of Aluminum Alloys for Elec-troplatingB254 Practice for Preparation of and Electroplating onStainless SteelB281 Practice for Preparation of Copper and Copper-BaseAlloys for Electroplating and Conversio

9、n CoatingsB320 Practice for Preparation of Iron Castings for Electro-platingB368 Test Method for Copper-Accelerated Acetic Acid-SaltSpray (Fog) Testing (CASS Test)B380 Test Method for Corrosion Testing of DecorativeElectrodeposited Coatings by the Corrodkote ProcedureB487 Test Method for Measurement

10、 of Metal and OxideCoating Thickness by Microscopical Examination of CrossSectionB489 Practice for Bend Test for Ductility of Electrodepos-ited and Autocatalytically Deposited Metal Coatings onMetalsB490 Practice for Micrometer Bend Test for Ductility ofElectrodepositsB499 Test Method for Measuremen

11、t of Coating Thick-nesses by the Magnetic Method: Nonmagnetic Coatings onMagnetic Basis MetalsB504 Test Method for Measurement of Thickness of Me-tallic Coatings by the Coulometric MethodB530 Test Method for Measurement of Coating Thick-nesses by the Magnetic Method: Electrodeposited NickelCoatings

12、on Magnetic and Nonmagnetic SubstratesB537 Practice for Rating of Electroplated Panels Subjectedto Atmospheric ExposureB568 Test Method for Measurement of Coating Thicknessby X-Ray SpectrometryB571 Practice for Qualitative Adhesion Testing of MetallicCoatingsB602 Test Method for Attribute Sampling o

13、f Metallic andInorganic Coatings1This specification is under the jurisdiction of ASTM Committee B08 onMetallic and Inorganic Coatings and is the direct responsibility of SubcommitteeB08.08.03 on Decorative Coatings.Current edition approved June 1, 2011. Published July 2011. Originally approvedin 196

14、7. Last previous edition approved in 2009 as B456 03(2009). DOI:10.1520/B0456-11.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page

15、 onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.B604 Specification for Decorative Electroplated Coatingsof Copper Plus Nickel Plus Chromium on PlasticsB659 Guide for Measuring Thickness of Metallic and Inor-ganic

16、CoatingsB697 Guide for Selection of Sampling Plans for Inspectionof Electrodeposited Metallic and Inorganic CoatingsB762 Test Method of Variables Sampling of Metallic andInorganic CoatingsB764 Test Method for Simultaneous Thickness and Elec-trode Potential Determination of Individual Layers inMultil

17、ayer Nickel Deposit (STEP Test)D1193 Specification for Reagent WaterD3951 Practice for Commercial PackagingE50 Practices for Apparatus, Reagents, and Safety Consid-erations for Chemical Analysis of Metals, Ores, andRelated MaterialsG85 Practice for Modified Salt Spray (Fog) Testing2.2 ISO Standards:

18、ISO 1456 Metallic coatingsElectrodeposited coatings ofnickel plus chromium and of copper plus nickel pluschromium33. Terminology3.1 Definitions:3.1.1 significant surfacesthose surfaces normally visible(directly or by reflection) that are essential to the appearance orserviceability of the article, o

19、r both, when assembled in normalposition; or that can be the source of corrosion products thatdeface visible surfaces on the assembled article. When neces-sary, the significant surfaces shall be specified by the purchaserand shall be indicated on the drawings of the parts, or by theprovision of suit

20、ably marked samples.4. Classification4.1 Five grades of coatings designated by service conditionnumbers and several types of coatings defined by classificationnumbers are covered by this specification.4.2 Service Condition Number:4.2.1 The service condition number indicates the severity ofexposure f

21、or which the grade of coating is intended:SC 5 extended severe serviceSC 4 very severe service,SC 3 severe service,SC 2 moderate service, andSC 1 mild service.4.2.2 Typical service conditions for which the variousservice condition numbers are appropriate are given in Appen-dix X1.4.3 Coating Classif

22、ication NumberThe coating classifica-tion number comprises:4.3.1 The chemical symbol for the basis metal (or for theprincipal metal if an alloy) followed by a slash mark, except inthe case of stainless steel. In this case, the designation shall beSS followed by the designated AISI number followed by

23、 aslash, that is, SS463/,4.3.2 The chemical symbol for copper (Cu) (if copper isused),4.3.3 A number indicating the minimum thickness of thecopper coating in micrometres (if copper is used),4.3.4 A lower-case letter designating the type of copperdeposit (if copper is used) (see 4.4 and 6.2.3),4.3.5

24、The chemical symbol for nickel (Ni),4.3.6 A number indicating the minimum thickness of thenickel coating, in micrometres,4.3.7 A lower-case letter designating the type of nickeldeposit (see 4.4 and 6.2.4),4.3.8 The chemical symbol for chromium (Cr), and4.3.9 A letter (or letters) designating the typ

25、e of chromiumdeposit and its minimum thickness in micrometres (see 4.4 and6.2.5).4.4 Symbols for Expressing ClassificationThe followinglower-case letters shall be used in coating classification num-bers to describe the types of coatings:a ductile copper deposited from acid-type bathsb single-layer n

26、ickel deposited in the fully-bright conditiond double- or triple-layer nickel coatingsr regular (that is, conventional) chromiummc microcracked chromiummp microporous chromium4.5 Example of Complete Classification NumbersA coat-ing on steel comprising 15 m minimum (ductile acid) copperplus 25 m mini

27、mum (duplex) nickel plus 0.25 m minimum(micro-cracked) chromium has the classification number: Fe/Cu15aNi25d Cr mc (see 4.3 and 6.2 for explanation ofsymbols).5. Ordering Information5.1 When ordering articles to be electroplated in confor-mance with this standard, the purchaser shall state the follo

28、w-ing:5.1.1 The ASTM designation number of this standard.5.1.2 Either the classification number of the specific coatingrequired (see 4.3) or the substrate material and the servicecondition number denoting the severity of the conditions it isrequired to withstand (see 4.2). If the service condition n

29、umberis quoted and not the classification number, the manufacturer isfree to supply any of the types of coatings designated by theclassification numbers corresponding to the specified servicecondition number, as given in Table 1, Table 2, Table 3, Table4,orTable 5. On request, the manufacturer shall

30、 inform thepurchaser of the classification number of the coating applied.5.1.3 The appearance required, for example, bright, dull, orsatin. Alternatively, samples showing the required finish orrange of finish shall be supplied or approved by the purchaser.5.1.4 The significant surfaces, to be indica

31、ted on drawingsof the parts, or by the provision of suitably marked specimens(see 3.1).5.1.5 The positions on significant surfaces for rack orcontact marks, where such marks are unavoidable (see 6.1.1).5.1.6 The extent to which defects shall be tolerated onnonsignificant surfaces.5.1.7 The elongatio

32、n of copper if other than the standardvalue (see 6.4).3Available from International Organization for Standardization (ISO), 1, ch. dela Voie-Creuse, Case postale 56, CH-1211, Geneva 20, Switzerland, http:/www.iso.ch.B456 1125.1.8 The ducitility of the nickel if other than the standardvalue (see 6.5)

33、.5.1.9 The extent of tolerable surface deterioration aftercorrosion testing (see 6.7.3).5.1.10 Sampling methods and acceptance levels (see Sec-tion 7).5.1.11 The minimum values of the electrode potential dif-ferences between individual nickel layers as measured inaccordance with Test Method B764 wit

34、hin the limits given in6.8.5.1.12 Adhesion TestThe adhesion test to be used (see6.3).6. Product Requirements6.1 Visual Defects:6.1.1 The significant surfaces of the electroplated articleshall be free of clearly visible plating defects, such as blisters,pits, roughness, cracks, and uncoated areas and

35、 shall not bestained or discolored. On articles where a visible contact markis unavoidable, its position shall be agreed upon by thepurchaser and the plater. The electroplated article shall be cleanand free of damage.6.1.2 Defects in the surface of the basis metal, such asscratches, porosity, noncon

36、ducting inclusions, roll and diemarks, cold shuts, and cracks, may adversely affect theappearance and the performance of coatings applied theretodespite the observance of the best electroplating practices.Accordingly, the platers responsibility for defects in thecoating resulting from such condition

37、s shall be waived.NOTE 1To minimize problems of this type, the specifications cover-ing the basis material or the item to be electroplated should containappropriate limitations on such basis metal conditions.6.2 Process and Coating Requirements:6.2.1 Proper preparatory procedures and thorough cleani

38、ngof the basis metal surface are essential for satisfactory adhesionand corrosion performance of the coating. Accordingly, theapplicable practices for the preparation of various basis metalsfor electroplating shall be followed. Practices B183, B242,B252, B281, and B320 are examples of practices that

39、 may beused for the preparation of basis metals.6.2.2 Following the preparatory operations, the parts (ar-ticles) to be electroplated are introduced in such plating bathsas required to produce the types of deposits described by theTABLE 1 Nickel Plus Chromium Coatings on SteelNOTE 1When permitted by

40、 the purchaser, copper may be used as anundercoat for nickel but is not substitutable for any part of the nickelthickness specified. If the use of copper is permitted, Table 2 may be usedto obtain the same service conditions.Service ConditionNo.Classification No. Nickel Thickness,mSC 5 Fe/Ni35d Cr m

41、c 35Fe/Ni35d Cr mp 35SC 4 Fe/Ni30d Cr mc 30Fe/Ni30d Cr mp 30SC 3 Fe/Ni25d Cr mc 25Fe/Ni25d Cr mp 25SC 2 Fe/Ni20b Cr r 20Fe/Ni15b Cr mc 15Fe/Ni15b Cr mp 15SC 1 Fe/Ni10b Cr r 10TABLE 2 Copper Plus Nickel Plus Chromium Coatings on SteelService ConditionNo.Classification No. Nickel Thickness,mSC 5 Fe/Cu

42、15a Ni30d Cr mc 30Fe/Cu15a Ni30d Cr mp 30SC 4 Fe/Cu15a Ni25d Cr mc 25Fe/Cu15a Ni25d Cr mp 25SC 3 Fe/Cu12a Ni20d Cr mc 20Fe/Cu12a Ni20d Cr mp 20TABLE 3 Copper Plus Nickel Plus Chromium Coatings on ZincAlloyService ConditionNo.Classification No. Nickel Thickness, mSC 5 Zn/Cu5 Ni35d Cr mc 35Zn/Cu5 Ni35

43、d Cr mp 35SC 4 Zn/Cu5 Ni30d Cr mc 30Zn/Cu5 Ni30d Cr mp 30SC 3 Zn/Cu5 Ni20d Cr mc 20Zn/Cu5 Ni20d Cr mp 20SC 2 Zn/Cu5 Ni20b Cr r 20Zn/Cu5 Ni15b Cr mc 15Zn/Cu5 Ni15b Cr mp 15SC 1 Zn/Cu5 Ni10b Cr r 10TABLE 4 Nickel Plus Chromium Coatings on Copper or CopperAlloyService ConditionNo.Classification No. Nic

44、kel Thickness, mSC 4 Cu/Ni25d Cr mc 25Cu/Ni25d Cr mp 25SC 3 Cu/Ni20d Cr mc 20Cu/Ni20d Cr mp 20Cu/Ni30b Cr r 30Cu/Ni25b Cr mc 25Cu/Ni25b Cr mp 25SC 2 Cu/Ni15b Cr r 15Cu/Ni10b Cr mc 10Cu/Ni10b Cr mp 10SC 1 Cu/Ni5b Cr r 5TABLE 5 Nickel Plus ChromiumAon Stainless Steels, AISIDesignated Type 300 and 400

45、Series,Band Copper Plus NickelPlus Chromium on Aluminum and Its AlloysNOTE 1Before nickel-chromium plating, the stainless steel surfaceand the aluminum substrate shall be prepared by a pretreatment fromPractice B254,CGuide B253,Dor equivalent, which is agreed uponbetween the supplier and the user.Se

46、rvice ConditionNo.Classification No.Nickel Thickness,mSC 4 SS-3XXE/Ni20b/Cr mp 20SC 4 SS-4xxE/Ni25b/Cr mp 25SC 5 Al/Cu15a/Ni40d/Cr mp 40AData in Table 5 were obtained using only microporous chromium systems. Nodata are available for the use of standard or microcracked systems.BThe stainless steel al

47、loy numbers used in this specification are based on theAISI system. They may not be interchangeable with other numbering systemssuch as the United Numbering System (UNS) or foreign designations.CPreplate for stainless steel substrates.DPreplate for aluminum substrates.EInsert number for specific 300

48、 or 400 alloy.B456 113specific coating classification numbers or one of the coatingclassification numbers listed in Table 1, Table 2, Table 3, Table4,orTable 5 appropriate for the specified service conditionnumber.6.2.3 Type of Copper and Deposit Thickness:6.2.3.1 Type of CopperThe type of copper is

49、 designatedby the following symbols that are placed after the thicknessvalue:a for ductile copper deposited from acid-type baths contain-ing additives that promote leveling by the copper deposit andthat have an elongation not less than 8 %.No symbol is placed after the thickness value if a minimumelongation is not required or if a deposit from a non-levelingbath is permitted.6.2.3.2 Thickness of Copper DepositsThe number follow-ing the chemical symbol for copper (Cu) indicates in microme-tres the minimum thickness of the copper deposit at points onsignif

copyright@ 2008-2019 麦多课文库(www.mydoc123.com)网站版权所有
备案/许可证编号:苏ICP备17064731号-1