1、Designation:D613813Standard Test Method forDetermination of Corrosion-Preventive Properties ofLubricating Greases Under Dynamic Wet Conditions(EmcorTest)1This standard is issued under the fixed designation D6138;the number immediately following the designation indicates the year oforiginal adoption
2、or,in the case of revision,the 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.Scope*1.1 This test method covers the determination of corrosion-preventive properties of gre
3、ases using grease-lubricated ballbearings under dynamic wet conditions.1.2 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.3 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It
4、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:2D217 Test Methods for Cone Penetration of LubricatingGreaseD665 Test Method for Ru
5、st-Preventing Characteristics ofInhibited Mineral Oil in the Presence of WaterD1193 Specification for Reagent Water2.2 ISO Standards:3ISO 15 Rolling bearings-Radial bearings-Boundary di-mensions-General planISO 3696 Water for analytical laboratory use-Specificationsand test methodsISO 7120 Petroleum
6、 products and lubricants-Petroleumoils and other fluids-Determination of rust-preventingcharacteristics in the presence of water3.Terminology3.1 Definitions:3.1.1 lubricating grease,na semifluid to solid product ofa thickener in a liquid lubricant.3.1.1.1 DiscussionThe dispersion of the thickener fo
7、rms atwo-phase system and immobilizes the liquid lubricant bysurface tension and other physical forces.Other ingredients arecommonly included to impart special properties.D2173.1.2 thickener,nin lubricating grease,a substance com-posed of finely-divided particles dispersed in a liquid lubricantto fo
8、rm the products structure.3.1.2.1 DiscussionThe thickeners can be fibers(such asvarious metallic soaps)or plates or spheres(such as certainnon-soap thickener),which are insoluble or,at most,only veryslightly soluble in the liquid lubricant.The general require-ments are that the solid particles be ex
9、tremely small,uniformlydispersed,and capable of forming a relatively stable,gel-likestructure with the liquid lubricant.D2173.2 Definitions of Terms Specific to This Standard:3.2.1 corrosion,nreddish rust or black spots on the race.3.2.1.1 Discussionany stain through which the underlyingmetal surfac
10、e is still visible shall be ignored.4.Summary of Test Method4.1 New,cleaned,and lubricated bearings are tested par-tially immersed in water(distilled,synthetic sea water,orsodium chloride solution)under no applied load at a speed of83 6 5 rpm in a predetermined sequence of running andstopping for a
11、period of approximately one week.Aftercleaning,the bearing rings are examined and rated according tothe degree of corrosion.5.Significance and Use5.1 This test method is used to assess the ability of grease toprevent corrosion in rolling bearings operated in the presenceof distilled water,sodium chl
12、oride solution,or synthetic seawater.It is used for development and specification purposes.6.Apparatus6.1 Test BearingsUse a double row self-aligning ballbearing(30 by 72 by 19 mm),conforming to 1306 K of1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products and Lubri
13、cants and is the direct responsibility of SubcommitteeD02.G0.06 on Functional Tests-Contamination.Current edition approved May 1,2013.Published May 2013.Originallyapproved in 1997.Last previous edition approved in 2011 as D6138 11.DOI:10.1520/D6138-13.2For referenced ASTM standards,visit the ASTM we
14、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 American National Standards Institute(ANSI),25 W.43rd St.,4th Floor,New York,NY 10036,http:/www.an
15、si.org.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 ISO 15,with a steel cage.4In cases of dispute,the SKF bearingspecified in Footnote 5 shall be used as the referee bear
16、ing.6.2 SKF TMG/Emcor Test Machine,see Annex A1 fordescription.6.3 Dentists Mirror,non-magnifying.6.4 Graduated Pipette or Syringe,capable of measuring 206 1 mL water.6.5 Oven,capable of maintaining 90 6 2C.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 Society,where such specifications are available.5O
