ASTM_D_2809_-_09.pdf

Designation:D280909Standard 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 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 characteristics 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 determining cavitation effects of two-phasecoolants.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 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.Specific warningstatements are given in 5.2.2.Referenced Documents2.1 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 Methods2.2 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 113C(235F)through a pressurized103-kPa(15-psig)simulated automotive coolant system(Note2).An aluminum automotive water pump,driven 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 given inTable 1.Photographs of typical eroded pumps after testingappear in the Appendix.NOTE2Tests run at other than 113C(235F)might show more or lesscavitation depending upon the coolant formulation.4.Significance and Use4.1 This test method can be used to distinguish betweencoolants that contribute 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 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 variables,to determine the effect of pump design,materialsof construction,and pump operating conditions on cavitationcorrosion and erosion-corrosion damage.5.Apparatus5.1 Pump Test Stand Detailed drawings are available.3The copper,brass,and bronze flow circuit is illustrated in Fig.1.The apparatus should be assembled upon a suitable platformor structure,with provisions for mounting controls and gages.5.2 Warning The entire stand should be screened orhoused to protect personnel from hazardous scalding coolant1This test method is under 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.1,2009.Published December 2009.Originallyapproved in 1969 as D280969T.Last previous edition approved in 2004 asD2809041.DOI:10.1520/D2809-09.2For 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.3Detail drawings of this apparatus and accompanying table of parts are availablefrom ASTM International Headquarters.Order Adjunct No.ADJD2809.Originaladjunct produced in 1985.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 in case of rupture in the pump,hose,or tubing.All belts andpulleys should be properly shielded.5.3 Test PumpStandard aluminum automotive waterpump and engine front cover assemblies shall be used.Thesame make and model must be used throughout a series of testswhen tests are conducted to evaluate coolants.4NOTE3If it is desired to evaluate pumps on this test apparatus,acoolant of a known level of cavitation corrosion and erosion-corrosionprotection should be used.6.Test Solution6.1 The test coolant is p