ASTM D7752-2011 2981 Standard Practice for Evaluating Compatibility of Mixtures of Hydraulic Fluids《评估液压油混合物兼容性的标准操作规程》.pdf
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1、Designation: D7752 11Standard Practice forEvaluating Compatibility of Mixtures of Hydraulic Fluids1This standard is issued under the fixed designation D7752; 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 practice covers the compatibility of mixtures ofhydraulic fluids as defined by Specifications D6158, DIN51524, ISO 11158, and
3、ISO 15380.1.2 This practice can be used to evaluate new (unused)lubricant compatibility or the effects of combining new (re-placement) lubricant with in-service (original) lubricant in thesystem.1.3 To evaluate primary compatibility using this method, thereplacement fluid must pass the ISO 13357-1 S
4、tage II filter-ability test. The original fluid is not required to pass ISO13357-1 filterability test, Stage I or II.1.4 Primary testing is conducted on fluid mixtures in 2:98,10:90, and 50:50 ratios using the ISO 13357-1 FilterabilityTest, Stage II.1.5 Secondary testing is suggested when circumstan
5、cesindicate the need for additional testing.1.6 This practice does not evaluate the wear preventioncharacteristics, load carrying capacity, or the mechanical shearstability of lubricant mixtures while in service. If anti-wear(AW), extreme pressure (EP), or shear stability are to beevaluated, further
6、 testing of these parameters may be required.1.7 This practice does not purport to cover all test methodsthat could be employed.1.8 The values stated in SI units are to be regarded asstandard. No other units of measurement are included in thisstandard.1.9 This standard does not purport to address al
7、l 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.2. Referenced Documents2.1 ASTM Standards:2D130 Test Method for
8、 Corrosiveness to Copper from Pe-troleum Products by Copper Strip TestD445 Test Method for Kinematic Viscosity of Transparentand Opaque Liquids (and Calculation of Dynamic Viscos-ity)D664 Test Method for Acid Number of Petroleum Productsby Potentiometric TitrationD665 Test Method for Rust-Preventing
9、 Characteristics ofInhibited Mineral Oil in the Presence of WaterD892 Test Method for Foaming Characteristics of Lubricat-ing OilsD974 Test Method for Acid and Base Number by Color-Indicator TitrationD1401 Test Method for Water Separability of PetroleumOils and Synthetic FluidsD2270 Practice for Cal
10、culating Viscosity Index from Kine-matic Viscosity at 40 and 100CD3427 Test Method forAir Release Properties of PetroleumOilsD6158 Specification for Mineral Hydraulic Oils2.2 ISO Standards:311158:1997 Lubricants, industrial oils and related products(class L)Family H (hydraulic systems)Specifications
11、for categories HH, HL, HM, HR, HV and HG13357-1:2002(E) Petroleum ProductsDetermination ofthe filterability of lubricating oilsPart 1: Procedure foroils in the presence of water13357-2:2005(E) Petroleum ProductsDetermination ofthe filterability of lubricating oilsPart 2: Procedure fordry oils1This p
12、ractice is under the jurisdiction of ASTM Committee D02 on PetroleumProducts and Lubricants and is the direct responsibility of Subcommittee D02.N0.09on Compatibility.Current edition approved Oct. 1, 2011. Published November 2011. DOI:10.1520/D775211.2For referenced ASTM standards, visit the ASTM we
13、bsite, 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 International Organization for Standardization (ISO), 1, ch. dela Voie-Creuse, CP 56, CH-1211
14、Geneva 20, Switzerland, http:/www.iso.org.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.15380:2002 Lubricants, industrial oils and related products(class L)Family H (Hydraulic systems)Specificationsfor categories HETG, HEPG, HEES,
15、and HEPR4788 Laboratory glasswareGraduated measuring cylin-ders2.3 DIN Standards:451524 Pressure fluidsHydraulic oilsParts 133. Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 2:98 mixture, na uniform blend of 2 % by weight oforiginal fluid with 98 % by weight of replacement flui
16、d.3.1.2 10:90 mixture, na uniform blend of 10 % by weightof original fluid with 90 % by weight of replacement fluid.3.1.3 50:50 mixture, na uniform blend of 50 % by weightof each of two component fluids.3.1.4 compatibility, nof hydraulic fluids, the ability ofhydraulic fluids to mix together without
17、 significant degradationof properties or performance.3.1.4.1 DiscussionCompatibility will be determined usingthe ISO 13357-1 filterability test. When a mixture passes theStage II filterability designation as specified in the ISO13357-1 test, the mixture is considered compatible at the testedratio by
18、 the primary testing procedure. If this practice is to beused for adding new (replacement) to in-service (original) andthe system is not drained (for example, top-up), two additionalratios will be required, 10:90 and 2:98. Depending on the ratiosthat have passed the test, flush quantities are given
19、in AnnexA1.3.1.5 fail, nin secondary compatibility testing of hydrau-lic fluid mixtures, a test result that is inferior to that of thepoorer of the two constituent fluids.3.1.6 original fluid, nfluid that the system is being con-verted from.3.1.7 pass, nin secondary compatibility testing of hydrau-l
20、ic fluid mixtures, a test result that is equal to or better than thatof the poorer of the two constituent fluids.3.1.8 primary testing, nTwo constituent fluids are com-bined at 2:98, 10:90, and 50:50 ratios by weight. The fluidmixtures are prepared, aged, and evaluated for changes infilterability us
21、ing the procedure described in ISO 13357-1.3.1.9 replacement fluid, nfluid that the system is beingconverted to.3.1.10 secondary testing, nMixtures of the fluids areprepared following ISO 13357-1 samples and sampling sectionand evaluated for changes in the parameters detailed in 7.4.3.1.11 type, nty
22、pe refers to lubricant base stock andadditive composition. For example, Rust and Oxidation Inhib-ited fluid (R however the cap shallhave the ability to seal tightly to prevent water evaporativeloss. The neck should be fairly narrow, but shall be wideenough to accept the stirrer (6.1.10). The base of
23、 the bottleshall be fairly flat.6.1.10 Motor and Stirrerconforming to the requirementsof Test Method D1401, subsection 5.3.6.1.11 Pipettes:6.1.11.1 Pasteur or dropping pipettes.6.1.11.2 1 mL graduated pipettes.6.1.12 Laboratory Hot Plate, with temperature probe andmagnetic stirring mechanism to cons
24、tantly stir mixtures at 706 2C.7. Procedure7.1 Either of two testing options can be used-the sequentialtesting protocol described in Option 1 (4.1), or the concurrenttesting protocol described in Option 2 (4.2). Using Option 1, a2:98 mixture and the two constituent fluids are tested using theprimary
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