ASTM_B_816_-_00_2015.pdf

Designation:B81600(Reapproved 2015)Standard Specification forCoatings of Cadmium-Zinc Mechanically Deposited1This standard is issued under the fixed designation B816;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 GeneralThis specification covers the requirements fora coating that is a mixture of cadmium and zinc deposited onmetallic products by mechanical deposition.The coating isprovided in four thickness classes(see Table 1)and severalfinish types(see Table 2).1.2 ToxicityWarning:Cadmium is toxic;therefore thesecoatings should not be used on articles that will contact food orbeverages,or for dental and other equipment that may beinserted into the mouth.Also,the coatings should not be usedon articles that will be heated to high temperatures,becausecadmium will form toxic fumes.Similarly,if coated articles arewelded,soldered,or otherwise heated during fabrication,adequate ventilation should be provided to exhaust toxicfumes.1.3 Similar DocumentsOther kinds of mechanically de-posited coatings are covered by Specifications B635,B695,and B696.1.4 The following precautionary caveat pertains only to thetest method portion,Section 9,of this specification.Thisstandard does not purport to address all of the safety concerns,if any,associated with its use.It is the responsibility of the userof this standard to establish appropriate safety and healthpractices and determine the applicability of regulatory limita-tions prior to use.2.Referenced Documents2.1 ASTM Standards:2B117 Practice for Operating Salt Spray(Fog)ApparatusB183 Practice for Preparation of Low-Carbon Steel forElectroplatingB242 Guide for Preparation of High-Carbon Steel for Elec-troplatingB320 Practice for Preparation of Iron Castings for Electro-platingB322 Guide for Cleaning Metals Prior to ElectroplatingB374 Terminology Relating 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 MetalsB571 Practice for Qualitative Adhesion Testing of MetallicCoatingsB602 Test Method for Attribute Sampling of Metallic andInorganic CoatingsB635 Specification for Coatings of Cadmium-Tin Mechani-cally DepositedB695 Specification for Coatings of Zinc Mechanically De-posited on Iron and SteelB696 Specification for Coatings of Cadmium MechanicallyDepositedB697 Guide for Selection of Sampling Plans for Inspectionof Electrodeposited Metallic and Inorganic CoatingsB762 Test Method of Variables Sampling of Metallic andInorganic CoatingsE27 Method for Spectrographic Analysis of Zinc and ZincAlloys by the Solution-Residue Technique3E396 Test Methods for Chemical Analysis of CadmiumE536 Test Methods for Chemical Analysis of Zinc and ZincAlloysF1470 Practice for Fastener Sampling for Specified Me-chanical Properties and Performance Inspection3.Terminology3.1 DefinitionsSome of the terms used in this are definedin Terminology B374.4.Classification4.1 Thickness ClassesThe coating is classified in fourthickness classes,as defined in Table 1.4.2 Coating TypesThe coating is classified by type,asdefined in Table 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 1991.Last previous edition approved in 2009 as B816 00(2009).DOI:10.1520/B0816-00R15.2For 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.3Withdrawn.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 5.Ordering Information5.1 In order to make the application of this specificationcomplete,the purchaser needs to supply the following infor-mation to the seller on the purchase order or other governingdocuments:5.1.1 The name,designation,and year of issue of thisspecification,5.1.2 Thickness class(see 4.1),including a maximum thick-ness if appropriate,5.1.3 Coating type(see 4.2),including required color ifType IIc is used,and required lubricant or organic finish ifType IId is used,5.1.4 Nature of the substrate,for example:high-carbonsteel,mild steel,copper,brass:5.1.4.1 State if precoating stress relief heat treatment isrequired and the time and temperature to be used if differentfrom the standard values(see section 12.1),5.1.4.2 State if special pretreatments are required to modifythe surface of the article(see Note 1),5.1.4.3 If special cleaning precauti