ASTM D8040-17 Standard Test Method for Corrosion Test for Heat Transfer Fluids in Glassware.pdf

1、Designation: D8040 17Standard 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 and health practices and determine the applica-bility of regulatory limitations prior to use. Specific hazardsstatements are given in 10.1.7.2

5、, 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 the World Trade

6、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 for ASTM Liquid

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

8、Determine 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 (190 F). The corro

9、sion-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. Significance and Use

10、4.1 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. The actual ser-vi

11、ce 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 testspecimens. The beaker shall be

12、 tightly closed with a No. 15rubber stopper, 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.41This test method is under the jurisdiction of ASTM Committee D15 on EngineCoolants and Related Fluid

13、s and is the direct responsibility of SubcommitteeD15.30 on Industrial Heat Transfer Fluids.Current edition approved May 1, 2017. Published June 2017. DOI: 10.1520/D8040-17.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For A

14、nnual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Details available from ASTM International Headquarters. Order Adjunct No.ADJD1384. Original adjunct produced in 1980.4The sole source of supply of the apparatus known to the committee at

15、this timeis Corning Glass Works. Gas-dispersion tube No. 39533, manufactured by CorningGlass Works, 44-5 Crystal St., Corning, NY, has generally been found satisfactoryfor 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 cons

16、istent 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 alternative suppliers,please provide this information to ASTM International Headquarters. Your com-ments will receive careful considerat

17、ion at a meeting of the responsible technicalcommittee,1which you may attend.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 principles on standard

18、ization 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.15.2 Condenser, a water condenser of the reflux, glass-tubetype, having a 400-mm (16-in.) con

19、denser 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 or Thermocouple), anASTM Partial Immer-sion Temperature Measuring Instrument having a range from20 to 150 C

20、(0 to 302 F) and conforming to the require-ments for 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 sp

21、ecified temperature control. The size of thebath will 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

22、range of metals and are customarilyused for research 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 102

23、0),7cut from 1.59-mm(116-in.) cold-rolled sheet stock 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)7

24、or UNS C11300 (SAE CA113).7Cold-rolled, cut from1.59-mm (116-in.) sheet stock to size 50.8 by 25.4 mm (2 by1 in.).6.1.3 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 i

25、n 6.1.3,coated with solder conforming to Alloy Grade 30A (SAE 3A)5If a water bath is used, a significant reduction in evaporation rate is achievedby addition of floating plastic chips on the water surface.6Unified numbering system for metals and alloys, SAE-ASTM, July 1995.7A round-robin evaluation

26、of coated solder report is available from ASTMInternational Headquarters and may be obtained by requesting Research ReportRR:D15-0132. Contact ASTM Customer Service at serviceastm.org.8A round-robin evaluation of nitric acid cleaning of aluminum specimens isavailable from ASTM International Headquar

27、ters and may be obtained by request-ing Research Report RR:D15-1018. Contact ASTM Customer Service atserviceastm.org.FIG. 1 Metal Specimens and Equipment for 336-h Corrosion TestD8040 172of Specification B32.8Solder-coated specimens may beprepared, or used specimens recoated for reuse, by the proce-

28、dure given in Annex A1. A solid solder specimen cut from1.59-mm (116-in.) sheet stock ofAlloy Grade 30A(SAE 3A) tosize 50.8 by 25.4 mm (2 by 1 in.) may be used subject tomutual agreement of the parties involved. The use of a solidsolder specimen must be reported along with the metalspecimen weight l

29、oss results.6.1.4.1 When agreed upon between the supplier and thepurchaser of HTF, the standard solder specimen may bereplaced with one 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.

30、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.6.1.5 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

31、 (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 of the hardwareused in metal specimen arrangement (metal specimen, screws,washers, metal spacers, insulating sleeves, insulating spacersand nuts) can be reused for

32、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 brass machinescrew covered with a thin-walled insulating sleeve. Tetrafluo-roethylene tubing with a 6.35-mm (14-in.) outside diameter1.59-mm (116-in.) wide and a w

33、all thickness of 0.4 mm(164-in.) is satisfactory. Two half-hard brass legs shall be cutfrom 1.59-mm (116-in.) sheet stock to size 50.8 by 25.4 mm(2 by 1 in.). A 6.35-mm (14-in.) diameter hole shall be drilledin each leg with the center 6.35 mm (14 in.) from the top and12.7 mm (12 in.) from each side

34、. The test “bundle” shall bemade up on the insulated screw with the specimens in thefollowing order: brass leg, copper, solder, brass, steel, cast iron,cast aluminum, and brass leg. The specimens shall be separatedby 4.76-mm (3/16-in.) thick solid metal spacers having a6.75-mm (1764-in.) inside diam

35、eter and a 11.11-mm (716-in.)outside diameter. Insulating spacers made from tetrafluoroeth-ylene shall be used between the brass legs and the specimen“bundle,” and between the brass and steel specimens. Brassspacers shall be used between the brass, solder, and copperspecimens, and steel spacers betw

36、een the cast iron, steel, andcast aluminum specimens. The nut shall be tightened firmly toensure good electrical contact between the test specimens ineach section of the “bundle.”6.2.2 Alternate Metal Specimen ArrangementWhenagreed upon between the supplier and the purchaser, analternate metal speci

37、men arrangement may be used to evaluatemultiple solder alloys, such as high lead Alloy Grade L501138consisting of 97 % lead, 2.5 % tin, 0.3 % silver, concurrentlywith StandardAlloy Grade 30Aor 30B. It is recommended thatthe metal specimen arrangement be modified by replacing thecopper specimen with

38、the high lead solder specimen andarranging specimens in the bundle as follows:High LeadSolderBrassAlloy Grade30A or 30BSteel Cast IronCastAluminumUse 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

39、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 coupon edges andhole. Scrub all specimens vigorously, using a moistened bristlebrush and ground pumice powder or fine silicon carbide grituntil the entire metal area

40、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 nearest 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

41、the test specimens are not to be used immediately, keepthem in a desiccator until required.FIG. 2 Metal Specimen ArrangementD8040 1738. Test Solutions8.1 The concentration of the heat transfer fluid (HTF) to betested shall be as follows:8.1.1 Prediluted HTFs at concentrations higher than 30 %by weig

42、ht 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 per liter of testsolution.8.1.2 HTF concentrates shall be diluted to 30 % by weightusing deioni

43、zed 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 Beaker AssemblyThe arrangement of the assembledmetal specimens with relation to the aerator tube

44、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 2 C (190 6 5 F).9.3 Aeration RateThe aeration rate shall be 100 6 10mL/min. The aerator tube

45、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. Procedure10.1 Make triplicate tests concurrently on each heat transferfluid solution in accordance with th

46、e 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 place the “bundle” in the test beaker as shown in Fig. 1.10.1.3 Pour 750 mL of the prepared test s

47、olution 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 the test solution to 88 C(190 F). Pass water through the condenser at a rate sufficientto mainta

48、in 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 evaporation losses during the corrosion tests byaddition of distilled or deionized water.10.1.7 A

49、t 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 brush and fine pumice to clean thespecimen completely.10.1.7.2 Copper and BrassDip in a 1+1 mixtur