ASTM_B_374_-_06_2011.pdf

Designation:B37406(Reapproved 2011)Endorsed by AmericanElectroplaters SocietyEndorsed by NationalAssociation of Metal FinishersStandard Terminology Relating toElectroplating1This standard is issued under the fixed designation B374;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.INTRODUCTIONThese definitions correspond to interpretations as applied to electroplating and do not necessarilycorrespond to the definitions used in other fields.1.Referenced Documents1.1 ASTM Standards:2B368 Test Method for Copper-Accelerated Acetic Acid-SaltSpray(Fog)Testing(CASS Test)2.Terminologyabrasive blastinga process for cleaning or finishing bymeans of an abrasive directed at high velocity against thework piece.activatorin diffusion coatings,a chemical,usually a halidesalt,that enters into a reaction with the source or masteralloy,depositing the source on the substrate.activationelimination of a passive condition on a surface.activity(ion)the ion concentration corrected for deviationsfrom ideal behavior.Concentration multiplied by activitycoefficient.addition agenta material added in small quantities to asolution to modify its characteristics.It is usually added to aplating solution for the purpose of modifying the character ofa deposit.adhesionthe attractive force that exists between an elec-trodeposit and its substrate that can be measured as the forcerequired to separate an electrodeposit and its substrate.adhesion,practical,nthe force or work required to detach orremove a coating from the underlayer or substrate;it can bemeasured in terms of peel,pull,or shear strength as anexperimentally determined quantity.aluminizingforming of an aluminum or aluminum alloycoating on a metal by hot dipping,hot spraying,or diffusion.amorphousnoncrystalline,or devoid of regular structure.amperethe current that will deposit silver at the rate of0.0011180 g/s.Current flowing at the rate of 1 C/s.angstrm unit(A)108cm.aniona negatively-charged ion.anodethe electrode in electrolysis,at which negative ionsare discharged,positive ions are formed,or other oxidizingreactions occur.anode corrosiondissolution of anode metal by the electro-chemical action in an electrolytic cell.anode efficiencycurrent efficiency of a specified anodicprocess.anode film(1)the layer of solution in contact with the anodethat differs in composition from that of the bulk of thesolution.(2)The outer layer of the anode itself consisting ofoxidation or reaction products of the anode metal.anode polarizationSee polarization.anodic coatinga protective,decorative,or functional coat-ing,formed by conversion of the surface of a metal in anelectrolytic oxidation process.anodizingan electrolytic oxidation process in which thesurface of a metal,when anodic,is converted to a coatinghaving desirable protective,decorative,or functional prop-erties.1This terminology is under the jurisdiction of ASTM Committee B08 onMetallic and Inorganic Coatingsand is the direct responsibility of SubcommitteeB08.01 on Ancillary Activities.Current edition approved April 1,2011.Published April 2011.Originallyapproved in 1961.Last previous edition approved in 2006 as B374 06.DOI:10.1520/B0374-06R10.2For 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 States1 anolytethe portion of electrolyte in the vicinity of the anode;in a divided cell,the portion of electrolyte on the anode sideof the diaphragm.anti-pitting agentan addition agent for the specific purposeof preventing gas pits in a deposit.autocatalytic platingdeposition of a metal coating by acontrolled chemical reduction,catalyzed by the metal oralloy being deposited.automatic machine(or conveyor)a machine for mechani-cally processing parts through treatment cycles,such ascleaning,anodizing,or plating.automatic plating:(1)fullplating in which the cathodes areautomatically conveyed through successive cleaning andplating tanks.(2)semiplating in which the cathodes areconveyed automatically through only one plating tank.auxiliary anodea supplementary anode employed duringelectrodeposition to achieve a desired thickness distributionof the deposit.auxiliary cathodeSee thief.back emf(electromotive force)the potential set up in anelectrolytic cell that opposes the flow of current,caused bysuch factors as concentration polarization and electrodefilms.See emf(electromotive force).ball burnishingSee barrel burnishing.barrel burnishingthe smoothing of surfaces by means oftumbling the work in rotating barrels in the presence ofmetallic or ceram