ASTM D1094-2007 Standard Test Method for Water Reaction of Aviation Fuels《航空燃料水反应性的试验方法》.pdf

1、Designation: D 1094 07An American National StandardStandard Test Method forWater Reaction of Aviation Fuels1This standard is issued under the fixed designation D 1094; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of las

2、t revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.1. Scope*1.1 This test method covers the determinat

3、ion of the pres-ence of water-miscible components in aviation gasoline andturbine fuels, and the effect of these components on volumechange and on the fuel-water interface.1.2 The values stated in SI units are to be regarded asstandard. No other units of measurement are included in thisstandard.1.3

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 applica-bility of regulatory limitations prior to use. This standardinvol

5、ves the use of hazardous chemicals identified in Section 7.Before using this standard, refer to suppliers safety labels,Material Safety Data Sheets and other technical literature.2. Referenced Documents2.1 ASTM Standards:2D 381 Test Method for Gum Content in Fuels by JetEvaporationD611 Test Methods

6、for Aniline Point and Mixed AnilinePoint of Petroleum Products and Hydrocarbon SolventsD 1836 Specification for Commercial HexanesD 2699 Test Method for Research Octane Number ofSpark-Ignition Engine FuelD 2700 Test Method for Motor Octane Number of Spark-Ignition Engine FuelD 3948 Test Method for D

7、etermining Water SeparationCharacteristics of Aviation Turbine Fuels by PortableSeparometer2.2 Energy Institute Standard:IP Standard Test Methods Vol 2, Appendix B, Specificationfor Petroleum Spirits33. Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 film, nthin, translucent laye

8、r that does not adhere tothe wall of the glass cylinder.3.1.2 lace, nfibers thicker than hairlike shred or of whichmore than 10 % are interlocking, or both.3.1.3 loose lace or slight scum, or both (Table 2, Rating 3),nan assessment that the fuel/buffer solution interface iscovered with more than 10

9、% but less than 50 % of lace orscum that does not extend into either of the two layers.3.1.4 scum, nlayer thicker than film or that adheres to thewall of the glass cylinder, or both.3.1.5 shred, nhairlike fibers of which less than 10 % areinterlocking.3.1.6 shred, lace or film at interface (Table 2,

10、 Rating 2),nan assessment that fuel/buffer solution interface containsmore than 50 % clear bubbles or some but less than 10 %shred, lace, film or both.3.1.7 tight lace or heavy scum, or both (Table 2, Rating 4),nan assessment that the fuel/buffer solution interface iscovered with more than 50 % of l

11、ace or scum, or both, thatextends into either of the two layers or forms an emulsion, orboth.3.1.8 water reaction interface conditions rating, na quali-tative assessment of the tendency of a mixture of water andaviation turbine fuel to form interface films or precipitates.3.1.9 water reaction separa

12、tion rating, na qualitativeassessment of the tendency of insufficiently cleaned glasswareto produce emulsions or precipitates, or both, in separated fueland water layers.3.1.10 water reaction volume change, na qualitative in-dication of the presence in aviation gasoline of water-solublecomponents.1T

13、his test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products and Lubricants and is the direct responsibility of SubcommitteeD02.J0.05 on Fuel Cleanliness.Current edition approved Dec. 1, 2007. Published January 2008. Originallyapproved in 1950. Last previous edition approved

14、in 2005 as D 109400(2005).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.3Available from Energy Institute, 6

15、1 New Cavendish St., London, WIG 7AR,U.K., http:/www.energyinst.org.uk.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.Copyright by ASTM Intl (all rights reserved); Tu

16、e Mar 24 03:58:18 EDT 2009Downloaded/printed byGuo Dehua (CNIS) pursuant to License Agreement. No further reproductions authorized.4. Summary of Test Method4.1 A sample of the fuel is shaken, using a standardizedtechnique, at room temperature with a phosphate buffer solu-tion in scrupulously cleaned

17、 glassware. The cleanliness of theglass cylinder is tested. The change in volume of the aqueouslayer and the appearance of the interface are taken as the waterreaction of the fuel.5. Significance and Use5.1 When applied to aviation gasoline, water reaction vol-ume change using the technique reveals

18、the presence ofwatersoluble components such as alcohols. When applied toaviation turbine fuels, water reaction interface rating using thetechnique is not reliable in revealing the presence of surfactantswhich disarm filter-separators quickly and allow free water andparticulates to pass; but can reve

19、al the presence of other typesof contaminants. Other tests, such as Test Method D 3948, arecapable of detecting surfactants in aviation fuels.6. Apparatus6.1 Graduated Glass Cylinder, glass-stoppered, 100 mL,with 1-mL graduations. The distance between the 100-mLmark and the top of the shoulder of th

20、e cylinder must be withinthe range from 50 to 60 mm.7. Reagents7.1 Purity of ReagentsReagent grade chemicals shall beused in all tests. Unless otherwise indicated, it is intended thatall reagents shall conform to the specifications of the Commit-tee on Analytical Reagents of the American Chemical So

21、ciety,where such specifications are available.4Other grades may beused, provided it is first ascertained that the reagent is ofsufficient purity to permit its use without lessening the accu-racy of the determination.7.2 Purity of WaterUnless otherwise indicated, referenceto water shall be understood

22、 to mean distilled water, or waterof equivalent purity.7.3 Acetone(WarningFlammable. Health hazard.)7.4 Glass-Cleaning SolutionSaturate concentrated sulfu-ric acid (H2SO4, sp gr 1.84) with potassium dichromate(K2Cr2O7) or sodium dichromate (Na2Cr2O7). (WarningCorrosive. Health hazard. Oxidizing agen

23、t.)7.5 n-HexaneConforming to Specification D 1836 orn-heptane conforming to material used in Test Methods D611,D 381, D 2699, and D 2700 or petroleum spirit 60/80 conform-ing to IPAppendix B Specification, or equivalent. (WarningFlammable. Health hazard.)7.6 Phosphate Buffer Solution (pH 7)Dissolve

24、1.15 g ofpotassium monohydrogen phosphate, anhydrous (K2HPO4)and 0.47 g of potassium dihydrogen phosphate, anhydrous(KH2PO4) in 100 mL of water. Larger volumes of the phos-phate buffer solution may be prepared provided the concentra-tion of K2HPO4and KH2PO4in the water solution is equiva-lent to tha

25、t described above. As an alternative, the laboratorymay use a commercially prepared solution.8. Preparation of Apparatus8.1 Clean the graduated cylinder thoroughly before carryingout this test. Only cylinders that are adequately cleaned can beused.8.1.1 Remove traces of oil from the graduated cylind

26、er andstopper by flushing with hot tap water, brushing if necessary.Alternately, remove all traces of oil from the graduatedcylinder and stopper, using either n-hexane or n-heptane or theIPpetroleum solvent 60/80. Rinse with acetone followed by tapwater.8.1.2 Following the washing described in 8.1.1

27、, immerse thecylinder and stopper in either (1) a non-ionic detergent clean-ing solution, or (2) glass cleaning solution described in 7.4.The type of non-ionic detergent and conditions for its use needto be established in each laboratory. The criterion for satisfac-tory cleaning shall be a matching

28、of the quality of that obtainedwith chromic acid cleaning solution. Non-ionic detergentcleaning avoids the potential hazards and inconveniencesrelated to handling corrosive chromic acid solutions. The latterremains as the reference cleaning practice and as such mayfunction as an alternate to the pre

29、ferred procedure-cleaningwith non-ionic detergent solutions. Following cleaning withnon-ionic detergent or glass cleaning solution, rinse with tapwater, then distilled water, and finally rinse with phosphatebuffer solution and drain.8.1.3 Inadequately cleaned glassware used in this test cangive misl

30、eading indications of fuel contaminants. Use onlycylinders that are adequately cleaned. Cylinders that draincleanly are adequately cleaned. Alternatively, a separationrating (see Table 1) of 2 or less is indicative of adequatelycleaned glassware.9. Preparation of Samples9.1 It is desirable to take a

31、 sample of at least 100 mL toperform this test. A clean container is required.9.2 Under no circumstances shall the sample be prefilteredafter collection. Filtration media can remove surfactants, thedetection of which is one of the purposes of this test method.If the test fuel sample is contaminated

32、with particulate matter,allow it to settle before testing.NOTE 1Test method results are known to be sensitive to tracecontamination from sampling containers.4Reagent Chemicals, American Chemical Society Specifications, AmericanChemical Society, Washington, DC. For suggestions on the testing of reage

33、nts notlisted by the American Chemical Society, see Analar Standards for LaboratoryChemicals, BDH Ltd., Poole, Dorset, U.K., and the United States Pharmacopeiaand National Formulary, U.S. Pharmacopeial Convention, Inc. (USPC), Rockville,MD.TABLE 1 SeparationRating Appearance(1) Complete absence of a

34、ll emulsions and/orprecipitates within either layer or upon the fuellayer.(2) Same as (1), except small air bubbles or smallwater droplets in the fuel layer.(3) Emulsions and/or precipitates within either layer orupon the fuel layer, and/or droplets in the waterlayer or adhering to the cylinder wall

35、s, excludingthe walls above the fuel layer.D1094072Copyright by ASTM Intl (all rights reserved); Tue Mar 24 03:58:18 EDT 2009Downloaded/printed byGuo Dehua (CNIS) pursuant to License Agreement. No further reproductions authorized.10. Procedure10.1 Measure 20 mL of phosphate buffer solution at roomte

36、mperature into the cylinder and record the volume to thenearest 0.5 mL.Add 80 mL, at room temperature, of the fuel tobe tested and stopper the cylinder.10.2 Shake the cylinder for 2 min 6 5 s, two to three strokesper second using 5 to 10-in. (12 to 25-cm) strokes.(WarningTake care to avoid a swirlin

37、g motion duringshaking of the cylinder since swirling action tends to break anyemulsion that might be formed.)10.3 Immediately place the cylinder on a vibration-freesurface and allow the contents to settle undisturbed for 5 min.10.4 Without picking up the cylinder, record the following,viewing in di

38、ffused light:10.4.1 The change in volume of the aqueous layer to thenearest 0.5 mL.10.4.2 The condition of the interface in accordance withTable 2.10.4.3 The degree of separation of the two phases inaccordance with Table 1.10.4.4 Disregard any slight cloudiness in the fuel layer thatis no longer vis

39、ible when viewed against a white background.11. Report11.1 The report shall include the following:11.1.1 Change in volume of the aqueous layer to the nearest0.5 mL.11.1.2 Rating of the condition of the interface (see Table 2).11.1.3 Rating of the degree of separation (see Table 1).12. Precision and

40、Bias12.1 PrecisionThe change in volume of the aqueous layeris a measure of water reaction of aviation gasoline and is aqualitative indication of watermiscible components and is notsubject to a statement of precision.12.1.1 It is not practical to specify the precision of theinterface rating as a meas

41、ure of the water reaction of aviationturbine fuels because results of the ratings described in Table 2are purely qualitative. Table 2 assigns a number to descriptionsof interface appearance as a convenient guide to qualitativeratings.12.2 BiasThe procedure in this test for water reaction ofaviation

42、fuels has no bias because the value of volume changeand interface rating is defined only in terms of the test method.13. Keywords13.1 aviatin gasoline; aviation turbine fuel; fuel water inter-face surfactants; water reaction; water-soluble additivesSUMMARY OF CHANGESSubcommittee D02.J0 has identifie

43、d the location of selected changes to this standard since the last issue(D 109400(2005) that may impact the use of this standard.(1) Revised 5.1.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of

44、this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five

45、years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical com

46、mittee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 1

47、9428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).TABLE 2 Interface ConditionsARating

48、Appearance1 Clear and clean1b Clear bubbles covering not more than anestimated 50 % of the interface and no shreds,lace, or film at the interface2 Shred, lace, or film at interface3 Loose lace or slight scum, or both4 Tight lace or heavy scum, or bothASection 3 contains definitions of terms used in this table.D1094073Copyright by ASTM Intl (all rights reserved); Tue Mar 24 03:58:18 EDT 2009Downloaded/printed byGuo Dehua (CNIS) pursuant to License Agreement. No further reproductions authorized.