ASTM_B_700_-_08_2014.pdf

Designation:B70008(Reapproved 2014)Standard Specification forElectrodeposited Coatings of Silver for Engineering Use1This standard is issued under the fixed designation B700;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,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.1.Scope1.1 This specification covers requirements for electrodepos-ited coatings of silver used for engineering purposes that maybe mat,bright,or semibright and are not less than 98%silverpurity.1.2 Coatings of silver covered by this specification areusually employed for solderable surfaces,electrical contactcharacteristics,high electrical and thermal conductivity,ther-mocompression bonding,wear resistance of load-bearingsurfaces,and spectral reflectivity.1.3 In the Appendixes important characteristics of elec-trodeposited silver coatings are briefly described which mustbe considered when used in engineering applications,namelyelectrical conductivity(see Appendix X1),silver migration(see Appendix X2),thickness(see Appendix X3),hardness(see Appendix X4),and atmospheric tarnish(see AppendixX5).1.4 The following hazards caveat pertains only to the testmethods section of this specification:This standard does notpurport to address the safety concerns,if any,associated withits use.It is the responsibility of the user of this standard toestablish appropriate safety and health practices and deter-mine the applicability of regulatory limitations prior to use.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 Preparation 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 Conversion CoatingsB322 Guide for Cleaning Metals Prior to ElectroplatingB343 Practice for Preparation of Nickel for Electroplatingwith NickelB374 Terminology Relating to ElectroplatingB481 Practice for Preparation of Titanium and TitaniumAlloys for ElectroplatingB482 Practice for Preparation of Tungsten and TungstenAlloys for ElectroplatingB487 Test Method for Measurement of Metal and OxideCoating Thickness by Microscopical Examination ofCross SectionB499 Test Method for Measurement of Coating Thicknessesby the Magnetic Method:Nonmagnetic Coatings onMagnetic Basis MetalsB504 Test Method for Measurement of Thickness of Metal-lic Coatings by the Coulometric MethodB507 Practice for Design of Articles to Be Electroplated onRacksB542 Terminology Relating to Electrical Contacts and TheirUseB567 Test Method for Measurement of Coating Thicknessby the Beta Backscatter MethodB568 Test Method for Measurement of Coating Thicknessby X-Ray SpectrometryB571 Practice for Qualitative Adhesion Testing of MetallicCoatingsB578 Test Method for Microhardness of Electroplated Coat-ingsB579 Specification for Electrodeposited Coatings of Tin-Lead Alloy(Solder Plate)B602 Test Method for Attribute Sampling of Metallic andInorganic CoatingsB678 Test Method for Solderability of Metallic-CoatedProductsB697 Guide for Selection of Sampling Plans for Inspectionof Electrodeposited Metallic and Inorganic CoatingsB762 Test Method of Variables Sampling of Metallic andInorganic CoatingsB849 Specification for Pre-Treatments of Iron or Steel forReducing Risk of Hydrogen Embrittlement1This specification is under the jurisdiction of ASTM Committee B08 onMetallic and Inorganic Coatings and is the direct responsibility of SubcommitteeB08.04 on Precious Metal Coatings.Current edition approved May 1,2014.Published May 2014.Originallyapproved in 1981.Last previous edition approved in 2008 as B700 08.DOI:10.1520/B0700-08R14.2B08For referenced ASTM standards,visit the ASTM website,www.astm.org,or contactASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 B850 Guide for Post-Coating Treatments of Steel for Reduc-ing the Risk of Hydrogen EmbrittlementD3951 Practice for Commercial PackagingE1004 Test Method for Determining Electrical ConductivityUsing the Electromagnetic(Eddy-Current)MethodF519 Test Method for Mechanical Hydrogen EmbrittlementEvaluation of Plating/Coating Processes and Service En-vironments3.Terminology3.1 DefinitionsMany of the terms used in this specifica-tion are defined in Terminologies B374 or B542.3.2 Definitions of Terms Specific to This Standard:3.2.1 rack-platingan electrodeposition process in whicharticles to be coated are mounted on ra