ASTM D8034 D8034M-2016 6141 Standard Test Method for Simulated Service Corrosion Testing of Non-Aqueous Engine Coolants《非水发动机冷却剂模拟服务腐蚀试验的标准试验方法》.pdf

1、Designation: D8034/D8034M 16Standard Test Method forSimulated Service Corrosion Testing of Non-AqueousEngine Coolants1This standard is issued under the fixed designation D8034/D8034M; the number immediately following the designation indicates theyear of original adoption or, in the case of revision,

2、 the year of last revision. A number in parentheses indicates the year of lastreapproval. A superscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This test method evaluates the effect of a circulatingengine coolant on metal test specimens and automoti

3、ve coolingsystem components under controlled, essentially isothermallaboratory conditions.1.2 This test method specifies test material, cooling systemcomponents, type of coolant, and coolant flow conditions thatare considered typical of current automotive use.1.3 The values stated in either SI units

4、 or inch-pound unitsare to be regarded separately as standard. The values stated ineach system may not be exact equivalents; therefore, eachsystem shall be used independently of the other. Combiningvalues from the two systems may result in non-conformancewith the standard. Some values have only SI u

5、nits because theinch-pound equivalents are not used in practice.1.4 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 appli

6、ca-bility of regulatory limitations prior to use. Specific precau-tionary statements are given in Section 6.2. Referenced Documents2.1 ASTM Standards:2D1121 Test Method for Reserve Alkalinity of Engine Cool-ants and AntirustsD1176 Practice for Sampling and Preparing Aqueous Solu-tions of Engine Cool

7、ants or Antirusts for Testing PurposesD1193 Specification for Reagent WaterD1287 Test Method for pH of Engine Coolants andAntirustsD2570 Test Method for Simulated Service Corrosion Testingof Engine CoolantsD7935/D7935M Test Method for Corrosion Test for Non-Aqueous Engine Coolants in GlasswareE203 T

8、est Method for Water Using Volumetric Karl FischerTitration2.2 SAE Standards:3SAE J20e Standard for Coolant System Hoses2.3 ASTM Adjuncts:Coolant reservoir (1 drawing)4Framework for test equipment (3 drawings and B/M)53. Summary of Test Method3.1 An engine coolant is circulated for 1064 h at 96.1C20

9、5F in a flow loop consisting of a metal reservoir, anautomotive coolant pump, an automotive radiator, and connect-ing rubber hoses. Test specimens representative of enginecooling system metals are mounted inside the reservoir, whichsimulates an engine cylinder block. At the end of the testperiod, th

10、e corrosion-inhibiting properties of the coolant aredetermined by measuring the mass losses of the test specimens,and by visual examination of the interior surfaces of thecomponents.4. Significance and Use4.1 This test method, by a closer approach to engine coolingsystem conditions, provides better

11、evaluation and selectivescreening of engine coolants than is possible from glasswaretesting (Test Method D7935/D7935M). The improvement isachieved by controlled circulation of the coolant, by the use ofautomotive cooling system components, and by a greater ratioof metal surface area to coolant volum

12、e.4.2 Although this test method provides improveddiscrimination, it cannot conclusively predict satisfactory cor-rosion inhibition and service life. If greater assurance of1This test method is under the jurisdiction of ASTM Committee D15 on EngineCoolants and Related Fluids and is the direct respons

13、ibility of SubcommitteeD15.22 on Non-Aqueous Coolants.Current edition approved July 1, 2016. Published September 2016. DOI:10.1520/D8034_D8034M-16.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandard

14、s volume information, refer to the standards Document Summary page onthe ASTM website.3Available from SAE International (SAE), 400 Commonwealth Dr., Warrendale,PA 15096, http:/www.sae.org.4Detail drawings are available from ASTM International Headquarters. OrderAdjunct No. ADJD257001. Original adjun

15、ct produced in 1982. Reservoirs of castiron or cast aluminum, made in accordance with these drawings may be obtainedfrom Commercial Machine Service, 1099 Touhy Ave., Elk Grove Village, IL 60007.5Detail and assembly drawings of a suitable framework and arrangement ofcomponents thereon are available f

16、rom ASTM International Headquarters. OrderAdjunct No. ADJD257002. Original adjunct produced in 1982.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1satisfactory performance is desired, it should be obtained fromfull-scale engine tests

17、 and from field testing in actual service.4.3 Significance and interpretation of the test and its limi-tations are discussed further in Appendix X1.4.4 The substitution of components in the apparatus ofSection 5 is permissible if agreed upon by the contractingparties.5. Apparatus5.1 ReservoirAn asse

18、mbly drawing of this component4isshown in Fig. 1. The material of construction, representing thatof the engine cylinder block, shall be SAE G3500 Gray Iron forAutomotive Castings.6No air line is to be attached.5.2 Automotive ComponentsThese shall be those normallyused with a 4-, 6-, or 8-cylinder au

19、tomobile engine used incurrent automobiles in the United States, in the 1.6 to 5.0-L 98to 305-in. range of piston displacement. General characteris-tics shall be as follows:5.2.1 RadiatorAluminum radiator, GM part No. 3093506,or equivalent, may be used subject to mutual agreement of theparties invol

20、ved. The radiator has a “neck” with a hose nippleand the top of the neck accepts a pressure cap.5.2.2 Radiator Pressure Cap80 to 100 kPa 12 to 15 psig,GM part No. 6410427. The pressure valve in the cap isremoved so as to allow free movement of coolant into and outof the hose nipple. The only purpose

21、 of the cap is to be able toopen or close the opening at the top of the radiator neck.5.2.3 Pressurized Expansion TankA plastic tank approxi-mately 2 L, capable of withstanding a gauge pressure of136 kPa 20 psig at 96.1C 205F. The tank has an opening6Aluminum or iron may be used if mutually agreed u

22、pon between the partiesinvolved.FIG. 1 ReservoirD8034/D8034M 162at the top to accept a pressure cap and a nipple at the bottomto accept a hose. Any other openings are sealed.5.2.4 Expansion Tank Pressure Cap80 to 100 kPa 12 to15 psig to fit the opening at the top of the expansion tank.5.2.5 Coolant

23、PumpGM part No. 14033483 (aluminummatching front end cover). GM part No. 14033526 (aluminumprovides back cover), coolant discharge parts and mounting forpump, or equivalent, may be used subject to mutual agreementof the parties involved.5.2.6 Coolant OutletGM part No. 14033198 (aluminum),or equivale

24、nt, may be used subject to mutual agreement of theparties involved.5.2.7 HosesReinforced elastomer, meeting the require-ments of SAE J20e Type 20R1 Standard Wall Class D-2requirements; heat-resistant cover; temperature rating: -40 to125C -40 to 257F.5.2.8 Hose ClampsPreferably worm-screw type (const

25、anttension may be used).5.3 Pipe FittingsThe preferred material for the fittingsrequired in the hose connections between pump discharge portsand reservoir inlet is malleable cast iron. A satisfactoryalternative is steel.5.4 Electric Motor1.1 kW 112 hp or larger, drip-proof orexplosion-proof in accor

26、dance with local safety regulations.5.5 Pulleys and Drive BeltSized to drive the pump at aspeed that will produce a flow rate of 1.3 to 1.6 L/s 20 to25 gal min for the General Motors 2.8-L 173-in.3V-6engine. The flow rate at operating temperature is determined bya flow measurement device7located bet

27、ween pump dischargeand reservoir inlet, as indicated in Fig. 2. The pressure dropbetween pump discharge and reservoir inlet, measured by thepressure gages shown in Fig. 2, must be maintained when theflow measurement device is removed from the system. Thiscan be done by substituting for the flow meas

28、urement device avariable-flow restriction, such as a valve, which can beadjusted to produce the same pressure drop as that measuredacross the flow measurement device at the specified flow rate.5.6 Electric HeaterAbout 2000 W, either a hot plateinstalled under the reservoir, or a circumferential, met

29、al-cladheater band around the reservoir.5.7 ThermoregulatorA suitable temperature regulatorshall be used to maintain the coolant temperature between thelimits specified by 9.3. The sensing unit of the regulator shallbe installed in an opening on the reservoir cover.7Flow rate indicator, 0.3 to 3.0 L

30、/s 4 to 50 gal/min, of bronze construction issatisfactory.FIG. 2 Assembly of Test ApparatusD8034/D8034M 1635.8 Temperature Measuring DeviceA thermocouple andread-out instrument capable of indicating coolant temperatureto the nearest 0.5C shall be installed in an opening on thereservoir cover.5.9 Fra

31、meworkA suitable framework shall be used tomount all the components as a unit.5NOTE 1The apparatus required for this test method is similar to thatrequired for Test Method D2570. Test Method D2570 Section 5Apparatusincludes possible component sources.6. Safety Precautions6.1 System PressureProtectio

32、n against bursting shall beprovided by a working pressure-relief cap at the top of theexpansion tank.Asafety enclosure is also recommended. Whenpower is applied to the heating element(s), the pump shall beturned on and circulating the test fluid.6.2 Pump DriveA safety guard for the coolant pump driv

33、ebelt and pulleys shall be provided.6.3 ElectricalElectrical circuits required for operation ofmotor, heater, and thermo-regulator shall be installed withsuitable precautions against electrical shock to operating per-sonnel in the event of accidental spills of electrically conduc-tive liquids.6.4 Th

34、ermalProtection of operating personnel againstburns from exposed metal surfaces, especially those of theheater, shall be provided.6.5 PlumbingProtection of operating personnel againstburns or scalds from hot fluid escaping from burst hoses orfailed plumbing connections shall be provided.7. Metal Tes

35、t SpecimensNOTE 2Current production vehicles may have differing alloy.Therefore, specimens other than those designated in this test method maybe used by mutual agreement of the parties involved.7.1 The description, specification, preparation, cleaning,and weighing of the metal test specimens to be u

36、sed in this testmethod are given in detail in Test Method D7935/D7935M.However, the solid solder specimen allowed as an alternative inTest Method D7935/D7935M shall not be used in this testmethod, as it has been known to bend and contact an adjoiningspecimen. Specimens containing high lead solder, o

37、r low leadsolder, or both, may be used subject to mutual agreement of theparties involved.NOTE 3The procedure for the cleaning of aluminum alloy couponswas changed in 1995 to eliminate the use of chromic acid, a recognizedhealth hazard.7.2 ArrangementThe metal test specimens shall be drilledthrough

38、the center with a 6.8-mm 1764-in. drill to accommo-date a 65-mm 212-in. 1024 brass machine screw coveredwith a thin-walled insulating sleeve. Polytetrafluoroethylenetubing with a 6.4-mm 14-in. outside diameter and a wallthickness of 0.4 mm 164 in. is satisfactory. The standard test“bundle” shall be

39、assembled on the insulated screw with thespecimens in the following order, starting from the screw head:copper, solder, brass, steel, cast iron, and cast aluminum. Thespecimens shall be separated by 5-mm 316-in. thick solidmetal and insulating spacers having a 6.8-mm 1764-in. insidediameter and an 1

40、1-mm 7.16-in. outside diameter. Brassspacers shall be used between the copper, solder, and brassspecimens, and steel spacers between the steel, cast iron, andcast aluminum specimens. Insulating spacers made from poly-tetrafluoroethylene shall be used between the screw head andthe copper specimen, be

41、tween the brass and steel specimens,and between the cast aluminum specimen and a brass nut. Thenut shall be tightened firmly to ensure good electrical contactbetween the test specimens in each section of the bundle. Asshown in Fig. 3, each bundle shall be positioned on a bracketmounted on the cap of

42、 the reservoir and fastened in place withanother brass nut; the 50.8-mm 2-in. dimensions of the testspecimens shall be horizontal when inserted into the reservoir.8. Test Solution8.1 The coolant to be tested shall be a 94 % by volumenon-aqueous coolant prepared with corrosive water (Note 4).The corr

43、osive water shall contain 100 ppm each of sulfate,chloride, and bicarbonate ions introduced as the sodium salts.Preparation of the sample shall be done in accordance withSection 6 of Test Method D1176, with corrosive water used fordilution. Thus, any insoluble materials will be included in therepres

44、entative sample.NOTE 41 L of the specified corrosive water can be prepared bydissolving the following amounts of anhydrous sodium salts in a quantityof distilled or deionized water:Sodium sulfate 148 mgSodium chloride 165 mgSodium bicarbonate 138 mgThe resulting solution should be made up to a volum

45、e of 1 L withdistilled or deionized water at 20C.9. Test Conditions9.1 AssemblyThe essential arrangement of the reservoir,radiator, coolant pump, and connecting hoses is shown in Fig.2. The gasketed coolant outlet is bolted to the reservoir cover.9.2 Coolant FlowThe coolant flow shall be maintained

46、at1.3 to 1.6 L/s 23 6 1 gal/min.9.3 TemperatureThe test coolant shall be maintained at atemperature of 96 6 3C 205 6 5F throughout the testexcept during shutdown periods.9.4 DurationThe test shall be run for 152 h/week for7 weeks. Operation shall be continuous, except for two 8-hshutdowns each week,

47、 until 1064 h of operation have beencompleted.10. Preparation of Apparatus10.1 ReservoirSand blast or bead blast the interior sur-faces of the reservoir and its cover to remove all rust and scalefrom previous tests. Wash with deionized water8and brush toremove all traces of sand; then thoroughly dry

48、 with pressurizedair. Visually examine the reservoir and cover. If any waterremains, use a dry towel to remove it. If spots so deeplycorroded as to render use of the vessel unsafe are found, or ifleaks are present, obtain a new reservoir and cover. Place a8Deionized water, Type IV Reagent Water, Spe

49、cification D1193.D8034/D8034M 164Buna N O-ring between the reservoir and the cover to effect aseal. Then, fasten the cover with bolts as shown in Fig. 1.10.2 Automotive ComponentsThe radiator, coolant pump,and connecting hoses shall be new for each test. The pressur-ized expansion tank must be blown out with pressurized airbefore re-use.NOTE 5Where performance certification is not required, used com-ponents may be employed if it can be demonstrated to the satisfaction ofthe parties invo