ASTM D2570-2009 Standard Test Method for Simulated Service Corrosion Testing of Engine Coolants《发动机冷却剂的模拟使用腐蚀的标准试验方法》.pdf
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1、Designation: D2570 09Standard Test Method forSimulated Service Corrosion Testing of Engine Coolants1This standard is issued under the fixed designation D2570; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revisio
2、n. 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 evaluates the effect of a circulatingengine coolant on metal test specimens and automotive coolingsystem componen
3、ts 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 foot-pound-second units are to beregarde
4、d as the standard. The values given in parentheses (SIunits) are approximate equivalents for information only.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 safet
5、y and health practices and determine the applica-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 a
6、nd Preparing Aqueous Solu-tions of Engine Coolants or Antirusts for Testing PurposesD1193 Specification for Reagent WaterD1287 Test Method for pH of Engine Coolants and Anti-rustsD1384 Test Method for Corrosion Test for Engine Coolantsin GlasswareD2758 Test Method for Engine Coolants by Engine Dyna-
7、mometerD2847 Practice for Testing Engine Coolants in Car andLight Truck ServiceD3306 Specification for Glycol Base Engine Coolant forAutomobile and Light-Duty ServiceD4985 Specification for Low Silicate Ethylene Glycol BaseEngine Coolant for Heavy Duty Engines Requiring aPre-Charge of Supplemental C
8、oolant Additive (SCA)2.2 SAE Standard:3SAE J20e Standard for Coolant System Hoses2.3 ASTM Adjuncts:Coolant reservoir (1 drawing)Framework for test equipment (3 drawings and B/M)3. Summary of Test Method3.1 An engine coolant is circulated for 1064 h at 190F(88C) in a flow loop consisting of a metal r
9、eservoir, 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, the corrosion-inhibiting properties of the
10、coolant aredetermined by measuring the mass losses of the test specimensand 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 evaluation and selectivescreening of engin
11、e coolants than is possible from glasswaretesting (Test Method D1384). The improvement is achieved bycontrolled circulation of the coolant, by the use of automotivecooling system components, and by a greater ratio of metalsurface area to coolant volume.4.2 Although this test method provides improved
12、 discrimi-nation, it cannot conclusively predict satisfactory corrosioninhibition and service life. If greater assurance of satisfactoryperformance is desired, it should be obtained from full-scaleengine tests (Test Method D2758) and from field testing inactual service (Practice D2847).4.3 Significa
13、nce and interpretation of the test and its limi-tations are discussed further in Appendix X1.4.4 If this test method is used as a qualification test forSpecification D3306 and Specification D4985, the recom-mended components listed in Section 5 shall be used. If it is notbeing used for such qualific
14、ation purposes, then suitable1This test method is under the jurisdiction of ASTM Committee D15 on EngineCoolants and is the direct responsibility of Subcommittee D15.09 on SimulatedService Tests.Current edition approved Nov. 1, 2009. Published December 2009. Originallyapproved in 1966. Last previous
15、 edition approved in 2008 as D2570 - 08. DOI:10.1520/D2570-09.2For 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
16、.3Available from Society of Automotive Engineers, 400 Commonwealth Dr.,Warrendale, PA 15096.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.substitution components may be used, if agreed upon betweenthe contracting parties.5. Apparat
17、us5.1 ReservoirAn assembly 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.5Install a right angle fitting on the top ofthe reservoir for attachment of an air line. Install a
18、shutoffvalve in the air line to avoid backing up the solution into thepressure hose.5.2 Automotive ComponentsThese shall be those nor-mally used with a 4, 6, or 8-cylinder automobile engine used incurrent automobiles in the United States, in the 1.6 to 5.0-L (98to 305-in.3) range of piston displacem
19、ent. General character-istics shall be as follows:5.2.1 RadiatorBrass, GM part No. 3056740 (cross flow),with coolant recovery tank. An aluminum radiator, GM partNo. 3093506, may be used subject to mutual agreement of theparties involved.5.2.2 Radiator Pressure CapNormally open 12 to 15 psi(80 to 100
20、 kPa), GM part No. 6410427.5.2.3 Coolant Pump5GM part No. 14033483 (aluminummatching front end cover). GM part No. 14033526 (aluminumprovides back cover), coolant discharge parts and mounting forpump.5.2.4 Coolant OutletGM part No. 14033198 (aluminum).5.2.5 HosesReinforced elastomer, meeting the req
21、uire-ments of SAE J20e.65.2.6 Hose ClampsPreferably worm-screw type (constanttension may be used).5.2.7 Hose Sight TubeA borosilicate glass sight tube shallbe installed in the top radiator hose. The tube should have aslight bead on each end. (The primary purpose of the sight tubeis to see that there
22、 is entrained air in the system.)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 Motor112 hp (1.1 kW) or larger, drip-proof orexplosion-pro
23、of in accordance with local safety regulations.5.5 Pulleys and Drive BeltSized to drive the pump ataspeed that will produce a flow rate of 20 to 25 gal/min (1.3 to1.6 L/s) for the General Motors 173-in.3(2.8-L) V-6 engine.The flow rate may be determined by a flow measurementdevice7located between pu
24、mp discharge and reservoir inlet, asindicated in Fig. 2. The pressure drop between pump dischargeand reservoir inlet, measured by the pressure gages shown inFig. 2, must be maintained when the flow measurement deviceis removed from the system. This can be done by substitutingfor the flow measurement
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