1、Designation:G21517Standard Guide forElectrode Potential Measurement1This standard is issued under the fixed designation G215;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
2、the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This guide provides guidance on the measurement ofelectrode potentials in laboratory and field studies both forcorrosion potentials and polarized potentials.1.2 The values
3、 stated in SI units are to be regarded asstandard.Any other units of measurements included in thisstandard are present because of their wide usage and accep-tance.1.3 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the use
4、r of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2C876 Test Method for Corrosion Potentials of UncoatedReinforcing Steel in ConcreteF746 Test Method for Pitting or
5、 Crevice Corrosion ofMetallic Surgical Implant MaterialsF2129 Test Method for Conducting Cyclic PotentiodynamicPolarization Measurements to Determine the CorrosionSusceptibility of Small Implant DevicesF3044 Test Method for Test Method for Evaluating thePotential for Galvanic Corrosion for Medical I
6、mplantsG3 Practice for Conventions Applicable to ElectrochemicalMeasurements in Corrosion TestingG5 Reference Test Method for Making PotentiodynamicAnodic Polarization MeasurementsG59 Test Method for Conducting Potentiodynamic Polariza-tion Resistance MeasurementsG61 Test Method for Conducting Cycli
7、c PotentiodynamicPolarization Measurements for Localized Corrosion Sus-ceptibility of Iron-,Nickel-,or Cobalt-Based AlloysG69 Test Method for Measurement of Corrosion Potentialsof Aluminum AlloysG71 Guide for Conducting and Evaluating Galvanic Corro-sion Tests in ElectrolytesG82 Guide for Developmen
8、t and Use of a Galvanic Seriesfor Predicting Galvanic Corrosion PerformanceG96 Guide for Online Monitoring of Corrosion in PlantEquipment(Electrical and Electrochemical Methods)G97 Test Method for Laboratory Evaluation of MagnesiumSacrificial Anode Test Specimens for Underground Appli-cationsG102 Pr
9、actice for Calculation of Corrosion Rates and Re-lated Information from Electrochemical MeasurementsG106 Practice for Verification of Algorithm and Equipmentfor Electrochemical Impedance MeasurementsG150 Test Method for Electrochemical Critical Pitting Tem-perature Testing of Stainless SteelsG193 Te
10、rminology and Acronyms Relating to Corrosion2.2 NACE Standards:3TM04972012 Measurement Techniques Related to Criteriafor Cathodic Protection on Underground or SubmergedMetallic Piping SystemsTM01012012 Measurement Techniques Related to Criteriafor Cathodic Protection of Underground Storage TankSyste
11、msTM01082012 Testing of Catalyzed Titanium Anodes forUse in Soils or Natural WatersTM01092009 Aboveground Survey Techniques for theEvaluation of Underground Pipeline Coating ConditionTM01902012 Impressed Current Laboratory Testing ofAluminum Alloy AnodesTM02112011 Durability Test for Copper/Copper S
12、ulfatePermanent Reference Electrodes for Direct Burial Appli-cationsTM01132013 Evaluating the Accuracy of Field Grade Ref-erence Electrode3.Terminology3.1 DefinitionsThe terminology used herein shall be inaccordance with Terminology G193.1This guide is under the jurisdiction of ASTM Committee G01 on
13、 Corrosion ofMetals and is the direct responsibility of Subcommittee G01.11 on ElectrochemicalMeasurements in Corrosion Testing.Current edition approved Jan.1,2017.Published January 2017.Originallyapproved in 2016.Last previous edition approved in 2016 as G215 16.DOI:10.1520/G0215-17.2For referenced
14、 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.3Available from NACE International(NACE),15835 Park Ten Pl.,Houston,TX77084,http:
15、/www.nace.org.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 Decision on Principles for theDevelopment
16、 of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 4.Summary of Practice4.1 Electrode potential measurements are made by electri-cally connecting a high impedance voltmeter or electrometerbetween the specimen electrode and a suitable referencehalf-cell electrode.See Practice G3.5.Significance and Use5.1 Electrode potential is the reversible work that is requiredto transfer a unit of positive charge between the
