ASTM_B_867_-_95_2018.pdf

Designation:B86795(Reapproved 2018)Standard Specification forElectrodeposited Coatings of Palladium-Nickel forEngineering Use1This standard is issued under the fixed designation B867;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 CompositionThis specification covers requirementsfor electrodeposited palladium-nickel coatings containing be-tween 70 and 95 mass%of palladium metal.Compositecoatings consisting of palladium-nickel and a thin gold over-plate for applications involving electrical contacts are alsocovered.1.2 PropertiesPalladium is the lightest and least noble ofthe platinum group metals.Palladium-nickel is a solid solutionalloy of palladium and nickel.Electroplated palladium-nickelalloys have a density between 10 and 11.5,which is substan-tially less than electroplated gold(17.0 to 19.3)and compa-rable to electroplated pure palladium(10.5 to 11.8).This yieldsa greater volume or thickness of coating per unit mass and,consequently,some saving of metal weight.The hardnessrange of electrodeposited palladium-nickel compares favorablywith electroplated noble metals and their alloys(1,2).2NOTE1Electroplated deposits generally have a lower density thantheir wrought metal counterparts.Approximate Hardness(HK25)Gold50250Palladium75600Platinum150550Palladium-Nickel300650Rhodium7501100Ruthenium60013001.3 The values stated in SI units are to be regarded as thestandard.The values given in parentheses are for informationonly.1.4This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.5 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:3B183 Practice for Preparation of Low-Carbon Steel forElectroplatingB242 Guide for Preparation of High-Carbon Steel 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 SectionB488 Specification for Electrodeposited Coatings of Goldfor Engineering UsesB489 Practice for Bend Test for Ductility of Electrodepos-ited and Autocatalytically Deposited Metal Coatings onMetalsB507 Practice for Design of Articles to Be Electroplated onRacksB542 Terminology Relating to Electrical Contacts and TheirUse1This specification is under the jurisdiction of ASTM Committee B08 onMetallic and Inorganic Coatings and is under the direct responsibility of Subcom-mittee B08.03 on Engineering Coatings.Current edition approved June 1,2018.Published June 2018.Originallyapproved in 1995.Last previous edition approved in 2013 as B867 95(2013).DOI:10.1520/B0867-95R18.2The boldface numbers in parentheses refer to the list of references at the end ofthis specification.3For 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 onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 B558 Practice for Preparation of Nickel Alloys for Electro-platingB568 Test Method for Measurement of Coating Thicknessby X-Ray SpectrometryB571 Practice for Qualitative Adhesion Testing of MetallicCoatingsB602 Test Method for Attribute Sampling of Metallic andInorganic CoatingsB697 Guide for Selection of Sampling Plans for Inspectionof Electrodeposited Metallic and Inorganic CoatingsB741 Test Method for Porosity In Gold Coatings On MetalSubstrates By Paper Electr