1、Designation:B48818Standard Specification forElectrodeposited Coatings of Gold for Engineering Uses1This standard is issued under the fixed designation B488;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A n
2、umber 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 electrodepos
3、-ited gold coatings that contain not less than 99.00 mass%goldand that are used for engineering applications.1.2 Specifically excluded from this specification areautocatalytic,immersion,and vapor deposited gold coatings.1.3 Gold coatings conforming to this specification are em-ployed for their corro
4、sion and tarnish resistance(includingresistance to fretting corrosion and catalytic polymerization),bondability,low and stable contact resistance,solderability,and infrared reflectivity.Several types of coatings,differing ingold purity and hardness,are covered by this specification.1.4 The values st
5、ated in SI units are to be regarded as thestandard.Values provided in parentheses are for informationonly.1.5 The following hazards caveat pertains only to the testmethods section,Section 9,of this specification:This standarddoes not purport to address all of the safety concerns,if any,associated wi
6、th its use.It is the responsibility of the user of thisstandard to establish appropriate safety,health,and environ-mental practices and determine the applicability of regulatorylimitations prior to use.1.6 This international standard was developed in accor-dance with internationally recognized princ
7、iples 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
8、-Carbon Steel forElectroplatingB242 Guide for Preparation of High-Carbon Steel for Elec-troplatingB253 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 El
9、ectroplating 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 P
10、reparation of Tungsten and TungstenAlloys for ElectroplatingB487 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 onMetalsB499 Test
11、 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 E
12、lectrical Contacts and TheirUseB558 Practice for Preparation of Nickel Alloys for Electro-platingB567 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
13、 of MetallicCoatingsB578 Test Method for Microhardness of Electroplated Coat-ings1This specification is under the jurisdiction of ASTM Committee B08 onMetallic and Inorganic Coatingsand is the direct responsibility of SubcommitteeB08.04 on Precious Metal Coatings.Current edition approved Aug.1,2018.
14、Published October 2018.Originallyapproved in 1968.Last previous edition approved in 2011 as B488 11.DOI:10.1520/B0488-18.2For 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
15、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
16、Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 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 CoatingsB735 Test Method for Porosity in Gold Coatings on MetalSubstrates by Nitric Aci
