1、Designation:D280921Standard Test Method forCavitation Corrosion and Erosion-Corrosion Characteristicsof Aluminum Pumps With Engine Coolants1This standard is issued under the fixed designation D2809;the number immediately following the designation indicates the year oforiginal adoption or,in the case
2、 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 covers the evaluation of the cavitationcorrosion and erosion-corrosion characteri
3、stics of aluminumautomotive water pumps with coolants.NOTE1During the development of this test method,it was found thatresults obtained when testing two-phase coolants did not correlate withresults from field tests.Therefore,the test method cannot be recommendedas being a significant test for determ
4、ining cavitation effects of two-phasecoolants.1.2 The values stated in SI units are to be regarded asstandard.The values given in parentheses after SI units areprovided for information only and are not considered standard.1.3 This standard does not purport to address all of thesafety concerns,if any
5、,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.Specific warning statements are given in 5.2.1.4 This international standard was d
6、eveloped in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Docu
7、ments2.1 ASTM Standards:2D1176 Practice for Sampling and Preparing Aqueous Solu-tions of Engine Coolants orAntirusts for Testing PurposesE177 Practice for Use of the Terms Precision and Bias inASTM Test MethodsE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test
8、Method2.2 ASTM Adjunct:3Pump test stand(7 drawings and Bill of Materials)3.Summary of Test Method3.1 This test method consists of pumping an aqueouscoolant solution at 113 C(235 F)through a pressurized103 kPa(15 psig)simulated automotive coolant system(Note2).An aluminum automotive water pump,driven
9、 at 4600 r/minby an electric motor,is used to pump the solution and to serveas the object specimen in evaluating the cavitation erosion-corrosion effect of the coolant under test.The pump isexamined to determine the extent of cavitation erosion-corrosion damage and is rated according to the system g
10、iven inTable 1.Photographs of typical eroded pumps after testingappear in the Appendix.NOTE2Tests run at other than 113 C(235 F)might show more orless cavitation depending upon the coolant formulation.4.Significance and Use4.1 This test method can be used to distinguish betweencoolants that contribu
11、te to cavitation corrosion and erosion-corrosion of aluminum automotive water pumps and those thatdo not.It is not intended that a particular rating number,asdetermined from this test,will be equivalent to a certainnumber of miles in a vehicle test;however,limited correlationbetween bench and field
12、service tests has been observed withsingle-phase coolants.Field tests under severe operating con-ditions should be conducted as the final test if the actual effectof the coolant on cavitation corrosion and erosion-corrosion isto be appraised.It is also possible,with proper control of thetest variabl
13、es,to determine the effect of pump design,materialsof construction,and pump operating conditions on cavitationcorrosion and erosion-corrosion damage.5.Apparatus5.1 Pump Test StandDetailed drawings are available.3Thecopper,brass,and bronze flow circuit is illustrated in Fig.1.1This test method is und
14、er the jurisdiction of ASTM Committee D15 on EngineCoolants and Related Fluids and is the direct responsibility of SubcommitteeD15.09 on Simulated Service Tests.Current edition approved Nov.1,2021.Published December 2021.Originallyapproved in 1969 as D280969T.Last previous edition approved in 2017 a
15、sD2809-09(2017).DOI:10.1520/D2809-21.2For 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.3Detailed drawings of this ap
16、paratus and accompanying table of parts areavailable from ASTM International Headquarters.Order Adjunct No.ADJD2809.Original adjunct produced in 1985.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 of International Standards,Guides and Recommendations issued by
