1、Designation:D793520Standard Test Method forCorrosion Test for Non-Aqueous Engine Coolants inGlassware1This standard is issued under the fixed designation D7935;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision
2、.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 a simple beaker-type procedurefor evaluating the effects of non-aqueous engine coolants onmetal specimens under
3、controlled laboratory conditions(seeAppendix X1).NOTE1For more information on aqueous and non-aqueous enginecoolants,see(Refs 1-9).21.2 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 s
4、tandard.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 environmental practices and deter-mine the applicability of regulatory limitations prior to
5、use.Some specific hazards statements are given in 10.1.7.2,10.1.7.3,and 10.1.7.4.1.4 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides
6、and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:3B32 Specification for Solder MetalB36/B36M Specification for Brass Plate,Sheet,Strip,AndRolled BarD1176 Practice for Sampling and Preparing Aqueous Solu-tion
7、s of Engine Coolants orAntirusts for Testing PurposesD1384 Test Method for Corrosion Test for Engine Coolantsin GlasswareE1 Specification for ASTM Liquid-in-Glass ThermometersE178 Practice for Dealing With Outlying ObservationsE230/E230M Specification for Temperature-ElectromotiveForce(emf)Tables fo
8、r Standardized Thermocouples2.2 ASTM Adjunct:4All-glass apparatus for corrosion test(2 drawings)3.Summary of Test Method3.1 In this test method,specimens of metals typical of thosepresent in engine cooling systems are totally immersed inaerated engine coolant solutions for 336 h at 96 C(205 F).The c
9、orrosion-inhibitive properties of the test solution areevaluated on the basis of the weight changes incurred by thespecimens.Each test is run in triplicate,and the average weightchange is determined for each metal.A single test mayoccasionally be completely out of line(see 11.3).4.Significance and U
10、se4.1 This test method will generally distinguish betweennon-aqueous coolants that are definitely deleterious from thecorrosion standpoint and those that are suitable for furtherevaluation.However,the results of this test method cannotstand alone as evidence of satisfactory corrosion inhibition.The
11、actual service value of an engine coolant formulation canbedeterminedonlybymorecomprehensivebench,dynamometer,and field tests.5.Apparatus5.1 Container,a 1000 mL,tall-form,spoutless beaker,madeof heat-resistant glass,for containing the non-aqueous enginecoolant solution and test specimens.The beaker
12、shall be tightlyclosed with a No.15 rubber stopper,having drill holes toaccommodate a water condenser,an aerator tube,and atemperature measuring instrument as shown in Fig.1.Optionally,an all-glass apparatus may be used.41This test method is under the jurisdiction of ASTM Committee D15 on EngineCool
13、ants and Related Fluids and is the direct responsibility of SubcommitteeD15.22 on Non-Aqueous Coolants.Current edition approved June 1,2020.Published June 2020.Originallyapproved in 2014.Last previous edition approved in 2014 as D7935/D7935M14.DOI:10.1520/D7935-202The boldface numbers in parentheses
14、 refer to the list of references at the end ofthis standard.3For 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.4Avail
15、able from ASTM International Headquarters.Order Adjunct No.ADJD1384.Original adjunct produced in 1980.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 pr
16、inciples on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.5.2 Condenser,a water condenser of the reflux,glass-tubetype,having a 400 mm(16 in.)condenser jacket.5.3 Aerator Tube,a gas-dispersion tube,porosity size 12-C,5to ensure continuous aeration without plugging.5.4 Temperature Measuring Instrument(EnvironmentallySafe Thermometer