1、Designation:D261909(Reapproved 2014)Standard Test Method forHydrolytic Stability of Hydraulic Fluids(Beverage BottleMethod)1This standard is issued under the fixed designation D2619;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the
2、 year of last revision.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 method2covers the determination of thehydrolytic stability of petroleum or synthetic-based hydraulicflui
3、ds.NOTE1Water-based or water-emulsion fluids can be evaluated by thistest method,but they are run“as is.”Additional water is not added to the100-g sample.In these cases,the person requesting the test needs to let thetest operator know that water is present.1.2 The values stated in SI units are to be
4、 regarded as thestandard.The English units given in parentheses are providedfor information only.1.3 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 pra
5、ctices and determine the applica-bility of regulatory limitations prior to use.Specific warningstatements are given in 3.1,6.1,6.3,6.9 and Annex A1.2.Referenced Documents2.1 ASTM Standards:3D130 Test Method for Corrosiveness to Copper from Petro-leum Products by Copper Strip TestD974 Test Method for
6、 Acid and Base Number by Color-Indicator Titration3.Summary of Test Method3.1 A copper test specimen and 75 g of test fluid plus 25 gof water(or 100 g of a water-containing fluid)are sealed in apressure-type beverage bottle.The bottle is rotated,end forend,for 48 h in an oven at 93 C(200 F).Layers a
7、re separatedand the weight change of the copper specimen is measured.The acid number change of the fluid and acidity of the waterlayer are determined.(WarningIn addition to otherprecautions,because this test method involves the use of aglass bottle that may contain approximately 200 kPa(2 atm)ofair
8、and water vapor at temperatures up to 93 C,a full faceshield and heavy woven fabric gloves should be worn whenhandling or working with the heated and sealed samplecontainer.)4.Significance and Use4.1 This test method differentiates the relative stability ofhydraulic fluids in the presence of water u
9、nder the conditionsof the test.Hydrolytically unstable hydraulic fluids form acidicand insoluble contaminants which can cause hydraulic systemmalfunctions due to corrosion,valve sticking,or change inviscosity of the fluid.The degree of correlation between thistest method and service performance has
10、not been fullydetermined.5.Apparatus5.1 Air Oven,convection,adjusted to 93 6 0.5 C(200 61 F).45.2 Pressure-Type Beverage Bottles,5200-mL(7-oz).5.3 Capping Press,for bottles.5.4 Rotating Mechanism,for holding bottles and rotatingend over end at 5 r/min in oven.5.5 Bchner Funnel and Filter Flask.5.6 W
11、ater Aspirator.5.7 Typewriter Brush.5.8 Separatory Funnel,125-mL.5.9 Balance,sensitive to 0.2 mg.5.10 Caps,for sealing bottles.1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products,Liquid Fuels,and Lubricantsand is the direct responsibility ofSubcommittee D02.N0.08 o
12、n Thermal Stability.Current edition approved Oct.1,2014.Published November 2014.Originallyapproved in 1967.Last previous edition approved in 2009 as D2619 09.DOI:10.1520/D2619-09R14.2This test method is a modification of Federal Test Method Standard No.791a,Method 3457 for Hydrolytic Stability.3For
13、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.4The sole source of supply of the apparatus known to the committee at t
14、his timeis Falex Corp.1020 Airpark Dr.,Sugar Grove,IL 60554.If you are aware ofalternative suppliers,please provide this information to ASTM InternationalHeadquarters.Your comments will receive careful consideration at a meeting of theresponsible technical committee,1which you may attend.5Bottles ca
15、n be obtained from beverage distributors.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 5.11 Inert Seal,for cap gasket,0.127-mm(0.005-in.)thickfluorocarbon seal.6.Reagents and Materials6.1 n-Heptane.(Warning Flammable,harmful if inhaled,
16、skin irritant on repeated contact,aspiration hazard;see A1.1.)6.2 Phenolphthalein,1%alcoholic solution.6.3 Potassium Hydroxide(KOH),0.1 N aqueous solutionstandardized to within 0.0005 N.(WarningCaustic.)6.4 Copper Strip(QQ-C-576A),16-22 B and S gage,13 by51 mm.6.5 Steel Wool,grade 1-medium fine.6.6 Litmus Paper.6.7 Filter Paper,Whatman No.41.6.8 Anhydrous Sodium Sulfate(Na2SO4).6.9 1,1,1-Trichloroethane(optionalfor use when the testfluid is a phosphate ester).(WarningHarmful if inhaled,high conc
