ASTM_G_162_-_99_2010.pdf

Designation:G16299(Reapproved 2010)Standard Practice forConducting and Evaluating Laboratory Corrosion Tests inSoils1This standard is issued under the fixed designation G162;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 practice covers procedures for conducting labora-tory corrosion tests in soils to evaluate the corrosive attack onengineering materials.1.2 This practice covers specimen selection and preparation,test environments,and evaluation of test results.1.3 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.4 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:2D1193 Specification for Reagent WaterD1654 Test Method for Evaluation of Painted or CoatedSpecimens Subjected to Corrosive EnvironmentsD2570 Test Method for Simulated Service Corrosion Testingof Engine CoolantsG1 Practice for Preparing,Cleaning,and Evaluating Corro-sion Test SpecimensG3 Practice for Conventions Applicable to ElectrochemicalMeasurements in Corrosion TestingG4 Guide for Conducting Corrosion Tests in Field Applica-tionsG16 Guide for Applying Statistics to Analysis of CorrosionDataG31 Practice for Laboratory Immersion Corrosion Testing ofMetalsG46 Guide for Examination and Evaluation of Pitting Cor-rosionG51 Test Method for Measuring pH of Soil for Use inCorrosion TestingG57 Test Method for Field Measurement of Soil ResistivityUsing the Wenner Four-Electrode MethodG71 Guide for Conducting and Evaluating Galvanic Corro-sion Tests in ElectrolytesG102 Practice for Calculation of Corrosion Rates and Re-lated Information from Electrochemical Measurements3.Significance and Use3.1 This practice provides a controlled corrosive environ-ment that has been utilized to produce relative corrosioninformation.3.2 The primary application of the data from this practice isto evaluate metallic materials for use in soil environments.3.3 This practice may not duplicate all field conditions andvariables such as stray currents,microbiologically influencedcorrosion,non-homogeneous conditions,and long cell corro-sion.The reproducibility of results in the practice is highlydependent on the type of specimen tested and the evaluationcriteria selected as well as the control of the operatingvariables.In any testing program,sufficient replicates shouldbe included to establish the variability of the results.3.4 Structures and components may be made of severaldifferent metals;therefore,the practice may be used to evaluategalvanic corrosion effects in soils(see Guide G71).3.5 Structures and components may be coated with sacrifi-cial or noble metal coatings,which may be scratched orotherwise rendered discontinuous(for example,no coating onthe edges of metal strips cut from a wide sheet).This test isuseful to evaluate the effect of defective metallic coatings.3.6 Structures and components may be coated or jacketedwith organic materials(for example,paints and plastics),andthese coatings and jackets may be rendered discontinuous.Thetest is useful to evaluate the effect of defective or incompletelycovering coatings and jackets.3.7 The corrosivity of soils strongly depends on soluble saltcontent(related parameters are soil resistivity,see Test Method1This practice is under the jurisdiction of ASTM Committee G01 on Corrosionof Metals and is the direct responsibility of Subcommittee G01.10 on Corrosion inSoils.Current edition approved Feb.1,2010.Published March 2010.Originallyapproved in 1999.Last previous edition approved in 2004 as G162-99(2004).DOI:10.1520/G0162-99R10.2For 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 G57,and chemistry),acidity or alkalinity(measured by soilpH,see Test Method G51),and oxygen content(loose,forexample,sand,or compact,for example,clay,soils are extremeexamples).The manufacturer,supplier,or user,or combinationthereof,should establish the nature of the expected soilenvironment(s)and select the test environment(s)accordingly.Multiple types of soil can be used to determine the effect of thisvariable.4.Test Apparatus and Conditions4.1 ContainerThe container for the soil shall be madefrom a material that is not affected by the soil environment andthat does not affect t