ASTM B488-2001(2010)e1 Standard Specification for Electrodeposited Coatings of Gold for Engineering Uses《工程用电解沉积镀金层标准规范》.pdf
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1、Designation: B488 01 (Reapproved 2010)1Standard 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 y
2、ear 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 Department of Defense.1NOTEEditorially corrected throughout in M
3、arch 2011.1. Scope1.1 This specification covers requirements for electrodepos-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 are auto-catalytic, immersion, and vapor deposited gold coatin
4、gs.1.3 Gold coatings conforming to this specification are em-ployed for their corrosion and tarnish resistance (includingresistance to fretting corrosion and catalytic polymerization),bondability, low and stable contact resistance, solderability,and infrared reflectivity. Several types of coatings,
5、differing ingold purity and hardness, are covered by this specification.1.4 The values stated 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 specificat
6、ion: This standarddoes not purport to address all of the safety concerns, if any,associated with its use. It is the responsibility of the user of thisstandard to establish appropriate safety and health practicesand determine the applicability of regulatory limitations priorto use.2. Referenced Docum
7、ents2.1 ASTM Standards:2B183 Practice for Preparation of Low-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 Pra
8、ctice 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 Titan
9、ium 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 of CrossSectionB489 Practice for Bend Test for Ductility of Electrodepos-ited and
10、Autocatalytically Deposited Metal Coatings onMetalsB499 Test Method for Measurement of Coating Thick-nesses by the Magnetic Method: Nonmagnetic Coatings onMagnetic Basis MetalsB504 Test Method for Measurement of Thickness of Me-tallic Coatings by the Coulometric MethodB507 Practice for Design of Art
11、icles to Be Electroplated onRacksB542 Terminology Relating to Electrical Contacts andTheir UseB558 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
12、-Ray SpectrometryB571 Practice for Qualitative Adhesion Testing of MetallicCoatingsB578 Test Method for Microhardness of ElectroplatedCoatings1This specification is under the jurisdiction of ASTM Committee B08 onMetallic and Inorganic Coatings and is the direct responsibility of SubcommitteeB08.08.0
13、2 on Precious Metal Coatings.Current edition approved Nov. 1, 2010. Published November 2010. Originallyapproved in 1968. Last previous edition approved in 2006 as B488 01(2006). DOI:10.1520/B0488-01R10E01.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer S
14、ervice at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.B602 Test Method for Attribute Sampling o
15、f 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 Acid VaporB741 Test Met
16、hod for Porosity In Gold Coatings On MetalSubstrates By Paper Electrography3B748 Test Method for Measurement of Thickness of Me-tallic Coatings by Measurement of Cross Section with aScanning Electron MicroscopeB762 Test Method of Variables Sampling of Metallic andInorganic CoatingsB765 Guide for Sel
17、ection of Porosity and Gross DefectTests for Electrodeposits and Related Metallic CoatingsB799 Test Method for Porosity in Gold and PalladiumCoatings by Sulfurous Acid/Sulfur-Dioxide VaporB809 Test Method for Porosity in Metallic Coatings byHumid Sulfur Vapor (“Flowers-of-Sulfur”)D1125 Test Methods
18、for Electrical Conductivity and Resis-tivity of WaterD3951 Practice for Commercial PackagingF390 Test Method for Sheet Resistance of Thin MetallicFilms With a Collinear Four-Probe Array2.2 U.S. Government Standards:4MIL-DTL-45204 Gold Plating, ElectrodepositedMIL-STD-1916 DOD Preferred Methods for A
19、cceptance ofProduct2.3 ANSI/ASQC Standard:5ANSI/ASQC Z1.4 Sampling Procedures and Tables forInspection by Attributes3. Terminology3.1 DefinitionsFor definitions of terms used in this speci-fication refer to Terminologies B374 or B542, B374, and B542.3.2 Definitions of Terms Specific to This Standard
20、:3.2.1 significant surfacesdefined as those normally vis-ible (directly or by reflection) or essential to the serviceabilityor function of the article. Can be the source of corrosionproducts or tarnish films that interfere with the function ordesirable appearance of the article. The significant surf
21、acesshall be indicated on the drawings of the parts or by theprovision of suitably marked samples.3.2.2 underplatinga metallic coating layer between thebasis metal or substrate and the topmost metallic coating. Thethickness of an underplating is usually greater than 1 m (40in.), in contrast to a str
22、ike or flash, which is thinner.4. Classification4.1 Types of CoatingsA coating shall be specified by acombination of the following:4.1.1 Type, characterizing minimum purity in accordancewith 4.2.1,4.1.2 Code, designating Knoop hardness in accordance with4.2.3, and4.1.3 a numeral designating thicknes
23、s in micrometres inaccordance with 4.3.4.2 Purity and Hardness:4.2.1 PurityThe issue of this standard establishes a newASTM Type designation, which is identical to the originalstandard (MIL-G-45204, which is now MIL-DTL-45204),established for electrodeposited gold and is outlined in thefollowing tab
24、le.Mass Percent Gold, Minimum,Excluding Potassium, Carbon how much greater islargely determined by the shape of the article (see Practice B507) and thecharacteristics of the plating process. In addition, the average coatingthickness on articles will vary from article to article within a productionlo
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