1、Designation:D782019Standard Test Method forEngine Coolant Corrosion Protection Under AcceleratedThermal and Oxidizing Conditions Using a RotatingPressure Vessel1This standard is issued under the fixed designation D7820;the number immediately following the designation indicates the year oforiginal ad
2、option 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 determination of engine coolantcorrosion protection a
3、nd stability under accelerated thermaland oxidizing conditions using a rotary pressure vessel.1.2 The values stated in SI units are to be regarded as thestandard.The values given in parentheses after SI units areprovided for information only and are not considered standard.1.3 This standard does not
4、 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 use.Specific hazard statements are
5、 given in 6.2,6.3,6.4,6.5,6.7,6.8,6.9,6.10,11.1,12.8,12.9,and 12.10.1.4 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 and Recom-men
6、dations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2B32 Specification for Solder MetalD1176 Practice for Sampling and Preparing Aqueous Solu-tions of Engine Coolants orAntirusts for Testing PurposesD1193 Specification for
7、Reagent WaterD1384 Test Method for Corrosion Test for Engine Coolantsin GlasswareD2272 Test Method for Oxidation Stability of Steam Tur-bine Oils by Rotating Pressure VesselE1 Specification for ASTM Liquid-in-Glass ThermometersE230/E230M Specification for Temperature-ElectromotiveForce(emf)Tables fo
8、r Standardized Thermocouples3.Summary of Test Method3.1 The engine coolant test fluid and a metal coupon bundleare placed in a covered glassware container in a pressure vesselequipped with a pressure gauge.The pressure vessel is chargedwith air or oxygen to a gauge pressure of 620 kPa(90 psi,6.2bar)
9、(see conversion factor 1),placed in a constanttempera-ture oil bath set at a controlled temperature(typically 115 C(239 F)or 150 C(302 F)and rotated axially at 100 rpm atan angle of 30 from horizontal for 168 h.The use of air oroxygen and test temperature is left to the discretion of the userof the
10、test.Engine coolant performance is assessed for corro-sion protection based on changes in metal coupon weights andcoolant stability is evaluated based on changes in coolantphysical and compositional properties.The test method isbased on a combination of Test Method D1384(modified metalcoupon bundle)
11、and Test Method D2272(glassware,pressurevessel,and bath apparatus)test procedures.100 kPa 5 1.00 bar 5 14.5 psi(1)4.Significance and Use4.1 Engines operating under severe conditions involvinghigh temperatures,hot spot areas,entrained air,or smallcooling systems,or combinations thereof,are placing gr
12、eateremphasis on engine coolant oxidation stability and corrosionprotection.This test method provides an accelerated testmethod to assess engine coolant performance under hightemperature oxidizing test conditions of new,used,or recycledengine coolants,or combinations thereof.The test method mayalso
13、serve as a screening tool to determine oxidation stability.The test results of this method cannot stand alone as evidenceof satisfactory oxidation stability and corrosion protection.Theactual service of an engine coolant formulation can be deter-mined only by more comprehensive bench,dynamometer,and
14、field tests.1This test method is under the jurisdiction of ASTM Committee D15 on EngineCoolants and Related Fluids and is the direct responsibility of SubcommitteeD15.21 on Extended Life Coolants.Current edition approved Oct.1,2019.Published November 2019.Originallyapproved in 2012.Last previous edi
15、tion approved in 2012 as D782012.DOI:10.1520/D782019.2For 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 AST
16、M 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 the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 5.Apparatus5.1 Oxidation Vessel,Glass Sample Container with Four-Hole Polytetrafluoroethy
