ASTM D8040-2018 Standard Test Method for Corrosion Test for Heat Transfer Fluids in Glassware.pdf

1、Designation: D8040 18Standard Test Method forCorrosion Test for Heat Transfer Fluids in Glassware1This standard is issued under the fixed designation D8040; 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 heat transfer fluids (HTF) on metalspecimens und

3、er controlled laboratory conditions. Fluids testedunder this method are specifically designed for heating and airconditioning (HVAC) systems.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

4、 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 hazards statements are g

5、iven in 10.1.7.2, 10.1.7.3,10.1.7.4, and A1.1.6.1.4 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-mendations issued by t

6、he World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2B32 Specification for Solder MetalB36/B36M Specification for Brass Plate, Sheet, Strip, AndRolled BarD1384 Test Method for Corrosion Test for Engine Coolantsin GlasswareE1 Specification

7、for ASTM Liquid-in-Glass ThermometersE177 Practice for Use of the Terms Precision and Bias inASTM Test MethodsE178 Practice for Dealing With Outlying ObservationsE230 Specification for Temperature-Electromotive Force(emf) Tables for Standardized ThermocouplesE691 Practice for Conducting an Interlabo

8、ratory Study toDetermine the Precision of a Test Method2.2 ASTM Adjunct:3All-glass apparatus for corrosion test (2 drawings)3. Summary of Test Method3.1 In this test method, specimens of metals typical of thosepresent in HVAC systems are totally immersed in aerated HTFsolutions for 336 h at 88 C (19

9、0 F). The corrosion-inhibitiveproperties of the test solution are evaluated on the basis of theweight changes incurred by the specimens. Each test is run intriplicate, and the average weight change is determined foreach metal.Asingle test may occasionally be completely out ofline (see 11.2).4. Signi

10、ficance and Use4.1 This test method will generally distinguish betweenHTFs that are definitely deleterious from the corrosion stand-point and those that are suitable for further evaluation.However, the results of this test method cannot stand alone asevidence of satisfactory corrosion inhibition. Th

11、e actual ser-vice value of an HTF formulation can be determined by morecomprehensive evaluation and field tests, agreed betweencustomer and supplier.5. Apparatus5.1 Container, a 1000 mL, tall-form, spoutless beaker, madeof heat-resistant glass, for containing the HTF solution and test1This test meth

12、od is under the jurisdiction of ASTM Committee D15 on EngineCoolants and Related Fluids and is the direct responsibility of SubcommitteeD15.30 on Industrial Heat Transfer Fluids.Current edition approved Dec. 1, 2018. Published December 2018. Originallyapproved in 2017. Last previous edition approved

13、 in 2017 as D804017. DOI:10.1520/D804018.2For 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.3Details available f

14、rom 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 p

15、rinciples 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.1specimens. The beaker shall be tightly closed with a No. 15rubber stopp

16、er, having drill holes to accommodate a watercondenser, an aerator tube, and a thermometer as shown in Fig.1. Optionally, an all-glass apparatus may be used.45.2 Condenser, a water condenser of the reflux, glass-tubetype, having a 400 mm (16 in.) condenser jacket.5.3 Aerator Tube, a gas-dispersion t

17、ube, porosity size 12-C,5to ensure continuous aeration without plugging.5.4 Temperature Measuring Instrument (EnvironmentallySafe Thermometer or Thermocouple), anASTM Partial Immer-sion Temperature Measuring Instrument having a range from20 to 150 C (0 to 302 F) and conforming to the require-ments f

18、or Thermometer 1C (1F), as prescribed in SpecificationE1 or Thermocouple as summarized in Specification E230.5.5 Heater, a constant-temperature bath containing a high-boiling liquid (see Note 1) that is capable of giving continuousservice with the specified temperature control. The size of thebath w

19、ill be determined by the number of corrosion tests thatare to be run concurrently.NOTE 1The specimens prescribed in this test method may not be thesame as that of alloys currently used for HVAC cooling system compo-nents. However, they offer a broad range of metals and are customarilyused for resear

20、ch and product screening. Specimens other than thosedesignated in this test method may be used by mutual agreement of theparties involved.6. Metal Test Specimens6.1 TypeThe following metal test specimens,6shall beused:6.1.1 Steel, UNS G10200 (SAE 1020),7cut from 1.59 mm(116 in.) cold-rolled sheet st

21、ock to size 50.8 by 25.4 mm (2 by1 in.). Chemical composition of the carbon steel is as follows:carbon, 0.17 to 0.23 %; manganese, 0.30 to 0.60 %;phosphorus, 0.040 % maximum; sulfur, 0.050 % maximum.6.1.2 Copper, conforming to UNS C11000 (SAE CA110)7or UNS C11300 (SAE CA113).7Cold-rolled, cut from 1

22、59mm (116 in.) sheet stock to size 50.8 by 25.4 mm (2 by 1 in.).4The sole source of supply of the apparatus known to the committee at this timeis Corning Glass Works. Gas-dispersion tube No. 39533, manufactured by CorningGlass Works, 44-5 Crystal St., Corning, NY, has generally been found satisfact

23、oryfor this purpose. Optionally, a capillary tip bleed tube with 0.28 in. (7 mm) bore and11.2 in. (280 mm) length may be used when consistent early plugging of gasdispersion tubes occurs. The tube, catalog No. 7815-19, may be obtained fromCorning Glass Works, Corning, NY 14830. If you are aware of a

24、lternative suppliers,please provide this information to ASTM International Headquarters. Your com-ments will receive careful consideration at a meeting of the responsible technicalcommittee,1which you may attend.5If a water bath is used, a significant reduction in evaporation rate is achievedby addi

25、tion of floating plastic chips on the water surface.6Unified numbering system for metals and alloys, SAE-ASTM, July 1995.7A round-robin evaluation of coated solder report is available from ASTMInternational Headquarters and may be obtained by requesting Research ReportRR:D15-0132. Contact ASTM Custo

26、mer Service at serviceastm.org.FIG. 1 Metal Specimens and Equipment for 336 h Corrosion TestD8040 1826.1.3 Brass, conforming to Alloy UNS C26000 (SAE CA260).8Half-hard, cut from 1.59 mm (116 in.) sheet stock to size50.8 by 25.4 mm (2 by 1 in.).6.1.4 SolderA brass specimen as described in 6.1.3,coate

27、d with solder conforming to Alloy Grade 30A (SAE 3A)of Specification B32.8Solder-coated specimens may beprepared, or used specimens recoated for reuse, by the proce-dure given in AnnexA1.Asolid solder specimen cut from 1.59mm (116 in.) sheet stock of Alloy Grade 30A (SAE 3A) to size50.8 by 25.4 mm (

28、2 by 1 in.) may be used subject to mutualagreement of the parties involved. The use of a solid solderspecimen must be reported along with the metal specimenweight loss results.6.1.4.1 When agreed upon between the supplier and thepurchaser of HTF, the standard solder specimen may bereplaced with one

29、having a different alloy composition thanstandardAlloy Grade 30Aor 30B. Use of specimens other thanstandard Alloy Grade 30A or 30B shall be noted in the testreport.NOTE 2Where non-standard alloy is used, the standard flux shown inA1.1.5 may not be satisfactory. A low corrosive flux may be required.6

30、1.5 Cast Aluminum, conforming to Alloy UNS A23190(SAE 329).7Specimen size, 50.8 by 25.4 by 3.18 mm (2 by 1by18 in.).6.1.6 Cast Iron, conforming to Alloy UNS F10007 (SAEG3500).6Specimen size, 50.8 by 25.4 by 3.18 mm (2 by 1 by18 in.).6.2 Arrangement (See Fig. 2):6.2.1 Metal Specimen ArrangementNone

31、of the hardwareused in metal specimen arrangement (metal specimen, screws,washers, metal spacers, insulating sleeves, insulating spacersand nuts) can be reused for a test. The metal test specimensshall be drilled through the center with a 6.75 mm (1764 in.)drill to accommodate a 50.8 mm (2 in.) 1024

32、 brass machinescrew covered with a thin-walled insulating sleeve. Tetrafluo-roethylene tubing with a 6.35 mm (14 in.) outside diameter 1.59mm (116 in.) wide and a wall thickness of 0.4 mm (164 in.) issatisfactory. Two half-hard brass legs shall be cut from 1.59mm (116 in.) sheet stock to size 50.8 b

33、y 25.4 mm (2 by 1 in.).A 6.35 mm (14 in.) diameter hole shall be drilled in each legwith the center 6.35 mm (14 in.) from the top and 12.7 mm (12in.) from each side. The test “bundle” shall be made up on theinsulated screw with the specimens in the following order:brass leg, copper, solder, brass, s

34、teel, cast iron, cast aluminum,and brass leg. The specimens shall be separated by 4.76 mm(316 in.) thick solid metal spacers having a 6.75 mm (1764 in.)inside diameter and a 11.11 mm (716 in.) outside diameter.Insulating spacers made from tetrafluoroethylene shall be usedbetween the brass legs and t

35、he specimen “bundle,” andbetween the brass and steel specimens. Brass spacers shall beused between the brass, solder, and copper specimens, and steelspacers between the cast iron, steel, and cast aluminumspecimens. The nut shall be tightened firmly to ensure goodelectrical contact between the test s

36、pecimens in each section ofthe “bundle.”6.2.2 Alternate Metal Specimen ArrangementWhenagreed upon between the supplier and the purchaser, analternate metal specimen arrangement may be used to evaluatemultiple solder alloys, such as high lead Alloy Grade L501138consisting of 97 % lead, 2.5 % tin, 0.3

37、 % silver, concurrentlywith StandardAlloy Grade 30Aor 30B. It is recommended thatthe metal specimen arrangement be modified by replacing thecopper specimen with the high lead solder specimen andarranging specimens in the bundle as follows:High LeadSolderBrassAlloy Grade30A or 30BSteel Cast IronCastA

38、luminumUse of alternate specimens and metal specimens arrange-ments shall be noted in the test report.7. Preparation of Test Specimens7.1 Sand the cast iron and cast aluminum specimens on the25.4 by 50.8 mm (1 by 2 in.) cut surfaces with “coarse” grade(No. 1) emery cloth. Remove any burrs from coupo

39、n edges andhole. Scrub all specimens vigorously, using a moistened bristlebrush and ground pumice powder or fine silicon carbide grit8A round-robin evaluation of nitric acid cleaning of aluminum specimens isavailable from ASTM International Headquarters and may be obtained by request-ing Research Re

40、port RR:D15-1018. Contact ASTM Customer Service atserviceastm.org.FIG. 2 Metal Specimen ArrangementD8040 183until the entire metal area is bright, shiny, and free from anyvisible oxide film or tarnish.7.2 Rinse the specimens thoroughly with tap water; thenrinse with acetone, dry, and weigh to the ne

41、arest 1 mg. Castaluminum specimens should be dried in a 100 C oven for 1 h,to a constant weight, prior to recording the weight.NOTE 3If the test specimens are not to be used immediately, keepthem in a desiccator until required.8. Test Solutions8.1 The concentration of the heat transfer fluid (HTF) t

42、o betested shall be as follows:8.1.1 Prediluted HTFs at concentrations higher than 30 %by weight of the freeze depressant, must be diluted to 30 % byweight with deionized water (demineralized) and shall bemixed with 99 mg of sodium sulfate, 110 mg of sodiumchloride, and 92 mg of sodium bicarbonate p

43、er liter of testsolution.8.1.2 HTF concentrates shall be diluted to 30 % by weightusing deionized water (demineralized). The diluted solutionshall then be mixed with 99 mg of sodium sulfate, 110 mg ofsodium chloride, and 92 mg of sodium bicarbonate per liter oftest solution.9. Test Conditions9.1 Bea

44、ker AssemblyThe arrangement of the assembledmetal specimens with relation to the aerator tube and othercomponents is shown in Fig. 1. Note that the tip of thecondenser just emerges from the bottom of the rubber stopper.9.2 Test TemperatureThe test solution shall be maintainedat a temperature of 88 6

45、 2 C (190 6 5 F).9.3 Aeration RateThe aeration rate shall be 100 6 10mL/min. The aerator tube should be located at least 12.7 mm(12 in.) away from the test “bundle” to avoid direct contact withthe metal specimens.9.4 Test DurationThe test shall be run continuously for2 weeks (336 h).10. Procedure10.

46、1 Make triplicate tests concurrently on each heat transferfluid solution in accordance with the following procedure:10.1.1 Carefully clean the test beaker, condenser, rubberstopper, and aerator tube, and thoroughly rinse with water.10.1.2 Bolt the specimens together in the order given in 6.2and plac

47、e the “bundle” in the test beaker as shown in Fig. 1.10.1.3 Pour 750 mL of the prepared test solution into the1000 mL beaker.10.1.4 Fit the condenser and aeration tube to the beaker, andset the aeration rate at 100 mL/min, using a flow meter or othersuitable device.10.1.5 Raise the temperature of th

48、e test solution to 88 C(190 F). Pass water through the condenser at a rate sufficientto maintain adequate cooling.10.1.6 Check the tests once each working day to ensureproper solution temperature, aeration rate, and solution level.The tests may operate unattended on weekends and holidays.Make up eva

49、poration losses during the corrosion tests byaddition of distilled or deionized water.10.1.7 At the end of the test, immediately disassemblespecimens and brush very lightly with a soft bristle brush andwater to remove loosely held corrosion products. To removethe more tenacious corrosion products and films, the individualspecimens shall then be subjected to additional cleaningtreatments as follows:10.1.7.1 Iron and SteelRemove adherent deposits bymeans of a brass scraper or brass bristle brush, followed byscrubbing with a wet bristle br