ASTM_G_111_-_97_2013.pdf

Designation:G11197(Reapproved 2013)Standard Guide forCorrosion Tests in High Temperature or High PressureEnvironment,or Both1This standard is issued under the fixed designation G111;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.1.Scope1.1 This guide covers procedures,specimens,and equip-ment for conducting laboratory corrosion tests on metallicmaterials under conditions of high pressure(HP)or thecombination of high temperature and high pressure(HTHP).See 3.2 for definitions of high pressure and temperature.1.2 Tests conducted under HP or HTHP by their nature havespecial requirements.This guide establishes the basic consid-erations that are necessary when these conditions must beincorporated into laboratory corrosion tests.1.3 The procedures and methods in this guide are applicablefor conducting mass loss corrosion,localized corrosion,andelectrochemical tests as well as for use in environmentallyinduced cracking tests that need to be conducted under HP orHTHP conditions.1.4 The primary purpose for this guide is to promoteconsistency of corrosion test results.Furthermore,this guidewill aid in the comparison of corrosion data between labora-tories or testing organizations that utilize different equipment.1.5 The values stated in SI units are to be regarded asstandard.The values given in parentheses are for informationonly.1.6 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user 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:2E8 Test Methods for Tension Testing of Metallic MaterialsG1 Practice for Preparing,Cleaning,and Evaluating Corro-sion Test SpecimensG3 Practice for Conventions Applicable to ElectrochemicalMeasurements in Corrosion TestingG5 Reference Test Method for Making PotentiodynamicAnodic Polarization MeasurementsG15 Terminology Relating to Corrosion and Corrosion Test-ing(Withdrawn 2010)3G30 Practice for Making and Using U-Bend Stress-Corrosion Test SpecimensG31 Guide for Laboratory Immersion Corrosion Testing ofMetalsG34 Test Method for Exfoliation Corrosion Susceptibility in2XXX and 7XXX Series Aluminum Alloys(EXCO Test)G38 Practice for Making and Using C-Ring Stress-Corrosion Test SpecimensG39 Practice for Preparation and Use of Bent-Beam Stress-Corrosion Test SpecimensG46 Guide for Examination and Evaluation of Pitting Cor-rosionG49 Practice for Preparation and Use of Direct TensionStress-Corrosion Test SpecimensG59 Test Method for Conducting Potentiodynamic Polariza-tion Resistance MeasurementsG78 Guide for Crevice Corrosion Testing of Iron-Base andNickel-Base Stainless Alloys in Seawater and OtherChloride-Containing Aqueous EnvironmentsG106 Practice for Verification of Algorithm and Equipmentfor Electrochemical Impedance Measurements3.Terminology3.1 DefinitionsThe definitions of terms given in Terminol-ogy G15 shall be considered as applying to this guide.3.2 Definitions of Terms Specific to This Standard:3.2.1 high pressurea pressure above ambient atmosphericpressure that cannot be contained in normal laboratory glass-ware.Typically,this is greater than 0.07 MPa(10 psig).1This guide is under the jurisdiction of ASTM Committee G01 on Corrosion ofMetals and is the direct responsibility of Subcommittee G01.05 on LaboratoryCorrosion Tests.Current edition approved May 1,2013.Published July 2013.Originally approvedin 1992.Last previous edition approved in 2006 as G11197(2006).DOI:10.1520/G0111-97R13.2For 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.3The last approved version of this historical standard is referenced onwww.astm.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 3.2.2 high temperaturetemperatures above ambient labo-ratory temperature where sustained heating of the environmentis required.4.Summary of Guide4.1 This guide describes the use of corrosion coupons,stressed SCC specimens,and electrochemical electrodes in HPand HTHPenvironments.It also includes guidelines for the useof high pressure test cells with these specimens to conductreproducible,accurate corrosion test data.4.2 Typically,HP and HPHT tests involve exposure of testspecimens to a liquid(aqueous or non-aqueous),gaseous ormultiphase environment,or both,in an appropriate test cell.The test cell must be able to resist corrosion and environmentalcracking in the test environment while containing thepressurized,heated environme