ASTM_B_635_-_00_2015.pdf

Designation:B63500(Reapproved 2015)Standard Specification forCoatings of Cadmium-Tin Mechanically Deposited1This standard is issued under the fixed designation B635;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 the requirements for a coatingthat is a mixture of cadmium and tin mechanically deposited onmetal products.The coating is provided in various thicknessesup to and including 12 m.1.2 Mechanical deposition greatly reduces the risk of hy-drogen embrittlement and is suitable for coating bores andrecesses in many parts that cannot be conveniently platedelectrolytically.(See Appendix X1.)1.3 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.4 This 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 and health practices and determine the applica-bility of regulatory limitations prior to use.For specific hazardsstatements,see Section 7.2.Referenced Documents2.1 ASTM Standards:2B117 Practice for Operating Salt Spray(Fog)ApparatusB183 Practice for Preparation of Low-Carbon Steel forElectroplatingB201 Practice for Testing Chromate Coatings on Zinc andCadmium SurfacesB242 Guide for Preparation of High-Carbon Steel for Elec-troplatingB322 Guide for Cleaning Metals Prior to 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 MetalsB567 Test Method for Measurement of Coating Thicknessby the Beta Backscatter MethodB571 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 CoatingsB762 Test Method of Variables Sampling of Metallic andInorganic CoatingsE87 Methods for ChemicalAnalysis of Lead,Tin,Antimony,and Their Alloys(Photometric Methods)(Withdrawn1983)3E396 Test Methods for Chemical Analysis of CadmiumF1470 Practice for Fastener Sampling for Specified Me-chanical Properties and Performance Inspection2.2 U.S.Federal Standard:FED-STD-141 Paint,Varnish,Lacquer,and Related Mate-rials;Methods of Inspection,Sampling and Testing42.3 U.S.Military Standard:MIL-L-7808J Lubricating Oil,Aircraft Turbine Engine,Syn-thetic Base43.Classification3.1 ClassesCadmium-tin coatings are classified on thebasis of thickness,as follows:ClassMinimum Thickness,m121288553.2 TypesCadmium-tin coatings are identified by types onthe basis of supplementary treatment required,as follows:3.2.1 Type IAs coated,without supplementary chromatetreatment(see X1.1).3.2.2 Type IIWith supplementary chromate treatment(seeX1.2).1This specification is under the jurisdiction of ASTM Committee B08 onMetallic and Inorganic Coatings and is the direct responsibility of SubcommitteeB08.06 on Soft Metals.Current edition approved March 1,2015.Published April 2015.Originallyapproved in 1978.Last previous edition approved in 2009 as B635 00(2009).DOI:10.1520/B0635-00R15.2For 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 onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.4Available from Standardization Documents Order Desk,Bldg.4 Section D,700Robbins Ave.,Philadelphia,PA 19111-5094,Attn:NPODS.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 4.Ordering Information4.1 To make the application of this specification complete,the purchaser needs to supply the following information to thesupplier in the purchase order or other governing document:4.1.1 Class,including a maximum thickness,if appropriate,type,and need for supplemental lubricant(3.1,3.2,and5.2.4.2).4.1.2 Nature of substrate,for example,high-strength steel,need for stress-relief,and cleaning precautions to be followed(5.2.2).4.1.3 Significant surfaces(5.3).4.1.4 Requirements and methods of testing for one or moreof the following requirements:need for and type of testspecimens(8.1),composition(8.2),thickness(8.4),adhesion(8.6),and absence of hydrogen embrittlement and the waitingperiod prior to testing and testing loads(8.8)and lubricatingresistance(S2).4.1.5 Sampling plan for each inspection criterion and re-sponsibility for inspection,if necessary(Section 6 and Supple-mentary Requirement S1).4.1.6 Require