1、Designation:D757712(Reapproved 2021)Standard Test Method forDetermining the Accelerated Iron Corrosion Rating ofDenatured Fuel Ethanol and Ethanol Fuel Blends1This standard is issued under the fixed designation D7577;the number immediately following the designation indicates the year oforiginal adop
2、tion 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 test method measures the ability of inhibited anduninhibited Ethanol Fuel
3、Blends defined by SpecificationD5798 and Denatured Fuel Ethanol defined by SpecificationD4806 to resist corrosion of iron should water become mixedwith the fuel,using an accelerated laboratory test method.Corrosion ratings are reported based on a visual,numberedrating scale.1.2 The values stated in
4、SI units are to be regarded asstandard.The values in parentheses are for information only.1.3 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,health,and environmen
5、tal practices and deter-mine the applicability of regulatory limitations prior to use.Specific hazard statements are given in Sections 7 and 8.1.4 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Pr
6、inciples for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2A29/A29M Specification for General Requirements for SteelBars,Carbon and Alloy,Hot-WroughtA108
7、Specification for Steel Bar,Carbon and Alloy,Cold-FinishedD665 Test Method for Rust-Preventing Characteristics ofInhibited Mineral Oil in the Presence of WaterD1193 Specification for Reagent WaterD2699 Test Method for Research Octane Number of Spark-Ignition Engine FuelD4175 Terminology Relating to
8、Petroleum Products,LiquidFuels,and LubricantsD4806 Specification for Denatured Fuel Ethanol for Blend-ing with Gasolines for Use as Automotive Spark-IgnitionEngine FuelD5798 Specification for Ethanol Fuel Blends for Flexible-Fuel Automotive Spark-Ignition EnginesE177 Practice for Use of the Terms Pr
9、ecision and Bias inASTM Test MethodsE2251 Specification for Liquid-in-Glass ASTM Thermom-eters with Low-Hazard Precision Liquids3.Terminology3.1 Definitions:3.1.1 For definitions of terms used in this test method,referto Terminology D4175.3.1.2 Fuel C,na volumetric mixture of 50 volume percentrefere
10、nce fuel grade toluene and 50 volume percent referencefuel grade isooctane.3.1.2.1 DiscussionSpecifications for reference fuel gradetoluene and reference fuel grade isooctane can be found in TestMethod D2699.3.2 Abbreviations:3.2.1 HDPE,nhigh density polyethylene3.2.2 PTFE,nPolytetrafluoroethylene4.
11、Summary of Test Method4.1 A polished steel test rod is immersed in a mixture of thetest sample and water at a ratio of 10 parts fuel sample to 1 partwater and held at a temperature of 37 C to 39 C(98 F to102 F)for 1 h.4.2 At the end of 1 h,the test rod is removed,rinsed andrated according to a numer
12、ic corrosion rating scale.5.Significance and Use5.1 This test is designed to be used as a rapid measure of theoverall relative corrosivity of Ethanol Fuel Blends(Specifica-tion D5798)and Denatured Fuel Ethanol(SpecificationD4806)to iron(steel).1This test method is under the jurisdiction of ASTM Comm
13、ittee D02 onPetroleum Products,Liquid Fuels,and Lubricants and is the direct responsibility ofSubcommittee D02.14 on Stability,Cleanliness and Compatibility of Liquid Fuels.Current edition approved May 1,2021.Published June 2021.Originallyapproved in 2012.Last previous edition approved in 2016 as D7
14、577 12(2016).DOI:10.1520/D7577-12R21.2For 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,
15、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 of International Standards,Guides and Reco
16、mmendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.15.2 The test can be used to compare corrosion inhibitordosage levels and effectiveness of various corrosion inhibitorsas they pertain to protecting iron(steel)materials fromcorrosion.6.Apparatus6.1 GeneralTwo test apparatus have been evaluated andfound to give comparable results.6.1.1 Large sample volume(300 mL)apparatus specified inTest Method D665.6.1.2 Small sample volume(30 mL to 75 mL)apparatusspec
