ASTM_B_456_-_17.pdf

Designation:B45617Standard 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 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.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope1.1 This specification 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 plus 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 performance: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 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 appropriate safety and health practices anddetermine the applicability of regulatory limitations prior touse.1.4 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: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 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 of Metal and OxideCoating Thickness by Microscopical Examination ofCross SectionB489 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 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 MethodB530 Test Method for Measurement of Coating Thicknessesby the Magnetic Method:Electrodeposited Nickel Coat-ings on Magnetic and Nonmagnetic Substrates1This specification is under the jurisdiction of ASTM Committee B08 onMetallic and Inorganic Coatings and is the direct responsibility of SubcommitteeB08.05 on Decorative Coatings.Current edition approved May 1,2017.Published June 2017.Originallyapproved in 1967.Last previous edition approved in 2011 as B456 11.DOI:10.1520/B0456-17.2For 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.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 B537 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 of Metallic andInorganic CoatingsB604 Specification for Decorative Electroplated Coatings ofCopper Plus Nickel Plus Chrom