1、Designation:G2010(Reapproved 2015)Standard Test Method forChemical Resistance of Pipeline Coatings1This standard is issued under the fixed designation G20;the number immediately following the designation indicates the year of originaladoption or,in the case of revision,the year of last revision.Anum
2、ber in parentheses indicates the year of last reapproval.Asuperscriptepsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method is intended for evaluating the resis-tance of pipe coating materials when exposed to variousconcentrations of reagents or susp
3、ected soil contaminants.Thetest serves as a guide to investigators wishing to compare therelative merits of pipe-coating materials in specific environ-ments.The choice of reagents,concentrations,duration ofimmersion,temperature of test,and properties to be reportedare necessarily arbitrary and shoul
4、d be chosen to reflectconditions known to exist along the pipeline right-of-way.1.2 The values stated in SI units are to be regarded as thestandard.The values given in parentheses are for informationonly.1.3 This standard does not purport to address all of thesafety concerns,if any,associated with i
5、ts 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:2D543 Practices for Evaluating the Resistance of Plastics toChemical Reag
6、entsD883 Terminology Relating to PlasticsG8 Test Methods for Cathodic Disbonding of Pipeline Coat-ingsG12 Test Method for Nondestructive Measurement of FilmThickness of Pipeline Coatings on Steel(Withdrawn2013)3G17 Test Method for Penetration Resistance of PipelineCoatings(Blunt Rod)3.Summary of Tes
7、t Method3.1 This test method consists of an immersion-type test in aclosed container where coated pipe specimens are in long-termcontact with both the liquid and vapor phase of the test reagent.Specimens exposed in this manner are inspected for visiblesigns of chemical attack.Subsequent tests for ca
8、thodic dis-bonding in accordance with Test Method G8,or penetrationunder load in accordance with Test Method G17,may beapplied to determine if the specimens have undergone any lossof mechanical or bonding properties.4.Significance and Use4.1 The data obtained for short-term tests are of interestonly
9、 in eliminating the most unsuitable materials or forindicating a probable order of resistance in any particularmedia.4.2 Test conditions should take into account the manner andduration of immersion,the reagent,the temperature of thesystem,the area exposed above and below the liquid level,andother pe
10、rformance factors selected for the particular test.5.Apparatus5.1 Thickness Gage,capable of measuring the coatingthickness in the manner prescribed by Test Method G12.5.2 Test ContainerA transparent closed container,sized tocompletely encase the pipe specimen and large enough toprovide adequate expo
11、sure to both the liquid and vapor statesof reagent.NOTE1For example,a 2-L(2.0-qt)capacity,Mason-type jar with a70-mm(2.75-in.)diameter neck has been found suitable for use with 2 in.pipe and is illustrated in Fig.1.5.2.1 To avoid pressure build-up within the test containers,the threaded cup shall be
12、 replaced with a solid-rubber stopper.A positive venting device,such as a water seal,shall be usedwhen testing with volatile solvents at elevated temperatures.5.2.2 A separate container shall be used for each testspecimen.5.3 Oven or Constant-Temperature Room or BathTo en-sure uniformity of test res
13、ults,the test cells and specimen shallbe maintained at the test temperature 65C(9F)over theduration of the test period.1This test method is under the jurisdiction of ASTM Committee D01 on Paintand Related Coatings,Materials,and Applications and is the direct responsibility ofSubcommittee D01.48 on D
14、urability of Pipeline Coating and Linings.Current edition approved Dec.1,2015.Published December 2015.Originallyapproved in 1971.Last previous edition approved in 2010 as G20 10.DOI:10.1520/G0020-10R15.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service
15、 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
16、,PA 19428-2959.United States1 5.4 Auxiliary Testing DevicesSupplemental equipmentused to determine specific mechanical properties of specimensbefore and after immersion shall conform to the requirementsprescribed in the applicable ASTM test method.6.Reagents6.1 The reagents selected for coating-resistance tests shouldbe those anticipated to occur in the environment or in theproduct being carried in the pipeline at the temperatures and inthe concentrations expected.The numbers in parentheses refe