ASTM_G_193_-_12d_NACE_Standard.pdf

Designation:NACE/ASTM G19312dStandard Terminology and Acronyms Relating toCorrosion1This standard is issued under the fixed designation NACE/ASTM G193;the number immediately following the designation indicatesthe year of original adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of lastreapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This terminology and acronyms standard covers anddefines commonly used terms and acronyms in the field ofcorrosion.Related terms may be found in Terminologies D16,D4538,G40,or other ASTM terminology standards.1.2 This terminology and acronyms standard is a result of anagreement between NACE International and ASTM Interna-tional Committee G01 on Corrosion of Metals and may notreflect the opinions of other ASTM committees.1.3 In this terminology and acronyms standard,brackets areused for directives that follow a definition and are obviouslynot part of it,such as,“see XXX”and“also known asXXX.”Brackets can also indicate the field of application orcontext of the definition or acronym.2.Referenced Documents2.1 ASTM Standards:2D16 Terminology for Paint,Related Coatings,Materials,andApplicationsD2583 Test Method for Indentation Hardness of Rigid Plas-tics by Means of a Barcol ImpressorD4538 Terminology Relating to Protective Coating andLining Work for Power Generation FacilitiesE10 Test Method for Brinell Hardness of Metallic MaterialsE18 Test Methods for Rockwell Hardness of Metallic Ma-terialsE92 Test Method for Vickers Hardness of Metallic Materials(Withdrawn 2010)3G40 Terminology Relating to Wear and Erosion2.2 NACE Standards:2NACE No.1/SSPC-SP 5 White Metal Blast CleaningNACE No.2/SSPC-SP 10 Near-White Metal Blast CleaningNACE No.3/SSPC-SP 6 Commercial Blast CleaningNACE No.4/SSPC-SP 7 Brush-Off Blast Cleaning2.3 SSPC Surface Preparation Standards:4SSPC-SP 1 Solvent CleaningSSPC-SP 2 Hand Tool CleaningSSPC-SP 3 Power Tool CleaningSSPC-SP 8 Pickling2.4 ISO Standards:5ISO 6506-1 Metallic materials-Brinell hardness test-Part1:Test methodISO 6507-1 Metallic materials-Vickers hardness test-Part 1:Test methodISO 6508-1 Metallic materials-Rockwell hardness test-Part 1:Test method(scales A,B,C,D,E,F,G,H,K,N,T)3.Terminology3.1 Definitions:abrasion resistancethe ability of a material to resist beingworn away and to maintain its original appearance andstructure when subjected to rubbing,scraping,or wear.abrasivea solid substance that,owing to its hardness,toughness,size,shape,consistency,or other properties,issuitable for grinding,cutting,roughening,polishing,orcleaning a surface by friction or high-velocity impact.abrasive blast cleaningcleaning and roughening of a sur-face produced by the high-velocity impact of an abrasive thatis propelled by the discharge of pressurized fluid from a blastnozzle or by a mechanical device such as a centrifugalblasting wheel.also referred to as abrasive blastingabrasive blastingsee abrasive blast cleaning.acceleratora chemical substance that increases the rate atwhich a chemical reaction(e.g.,curing)would otherwiseoccur.AC impedancesee electrochemical impedance.1This terminology and acronyms standard is under the jurisdiction of NACE/ASTM Committee J01,Joint Committee on Corrosion,and is the direct responsi-bility of Subcommittee J01.02,Working Group on Terminology.Current edition approved Dec.1,2012.Published February 2013.Originallyapproved in 2009.Last previous edition approved in 2012 as G19312c.DOI:10.1520/G0193-12D.2For referenced ASTM standards,visit the ASTM Web site,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page ontheASTM Web site.For NACE standards,visit the NACE Web site,www.nace.org,or contact NACE FirstService at firstservicenace.org.3The last approved version of this historical standard is referenced onwww.astm.org.4Available from The Society for Protective Coatings(SSPC),40 24th St.,6thFloor,Pittsburgh,PA 15222-4656,http:/www.sspc.org.5Available from International Organization for Standardization(ISO),1,ch.dela Voie-Creuse,Case postale 56,CH-1211,Geneva 20,Switzerland,http:/www.iso.org.NACE International/ASTM International 2013 All rights reserved1 acrylictype of resin polymerized from acrylic acid,meth-acrylic acid,esters of these acids,or acrylonitrile.activatora chemical substance that initiates a chemicalreaction(e.g.,curing).Heat and radiation may also serve asactivators for some chemical reactions.active(1)a state of a metal surface that is corroding withoutsignificant influence of reaction product.(2)the negativedirection of electrode potential.active-passive cellan electrochemical cell in which theanode is a metal in the active state and the cathode is thesame metal in the passive state.adduct curing agenta material that is formed by prereactingthe curing agent with a portion of the resin component of the