ASTM_D_6078_-_04_2010.pdf

Designation:D607804(Reapproved 2010)Standard Test Method forEvaluating Lubricity of Diesel Fuels by the Scuffing LoadBall-on-Cylinder Lubricity Evaluator(SLBOCLE)1This standard is issued under the fixed designation D6078;the number immediately following the designation indicates the year oforiginal adoption 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.Scope1.1 This test method covers the evaluation of the lubricity(load carrying ability)of diesel fuels using a scuffing loadball-on-cylinder lubricity evaluator(SLBOCLE).1.2 This test method is applicable to middle distillate fuels,such as Grades Low Sulfur No.1 D,Low Sulfur No.2 D,No.1 D,and No.2 D diesel fuels,in accordance with SpecificationD975;and other similar petroleum-based fuels which can beused in diesel engines.NOTE1It is not known that this test method will predict theperformance of all additive/fuel combinations.Additional work is under-way to further establish this correlation and future revisions of thestandard may be necessary once this work is complete.1.3 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.4 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.Specific warningstatements are given in Section 7.2.Referenced Documents2.1 ASTM Standards:2D975 Specification for Diesel Fuel OilsD4057 Practice for Manual Sampling of Petroleum andPetroleum ProductsD4177 Practice for Automatic Sampling of Petroleum andPetroleum ProductsD4306 Practice for Aviation Fuel Sample Containers forTests Affected by Trace ContaminationD5001 Test Method for Measurement of Lubricity of Avia-tion Turbine Fuels by the Ball-on-Cylinder LubricityEvaluator(BOCLE)D6079 Test Method for Evaluating Lubricity of Diesel Fuelsby the High-Frequency Reciprocating Rig(HFRR)2.2 American Iron and Steel Institute Standard:3AISI E-52100 Chromium Alloy Steel2.3 American National Standards Institute Standard:4ANSI B3.12,Metal Balls2.4 Society of Automotive Engineers Standard:5SAE 8720 Steel3.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 applied load,nthe weight in grams added to the loadarm of the SLBOCLE unit.3.1.2 boundary lubrication,na condition in which thefriction and wear between two surfaces in relative motion aredetermined by the properties of the surfaces and the propertiesof the contacting fluid,other than bulk viscosity.3.1.2.1 DiscussionMetal-to-metal contact occurs and thechemistry of the system is involved.Physically adsorbed orchemically reacted soft films(usually very thin)supportcontact loads.As a result some wear is inevitable.3.1.3 contact load,nthe force in grams with which theball contacts the test ring.3.1.3.1 DiscussionFor the SLBOCLE cantilever systemthe contact load is two times the applied load.3.1.4 friction coeffcient,n tangential friction force di-vided by the contact load.3.1.5 friction trace,na recorded trace of the tangentialfriction force in grams.1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products,Liquid Fuels,and Lubricants and is the direct responsibility ofSubcommittee D02.E0 on Burner,Diesel,Non-Aviation Gas Turbine,and MarineFuels.Current edition approved Oct.1,2010.Published November 2010.Originallyapproved in 1997.Last previous edition approved in 2004 as D607804.DOI:10.1520/D6078-04R10.2For 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.3American Iron and Steel Institute(AISI),1140 Connecticut Ave.,Suite 705,Washington,DC 20036.4Available from American National Standards Institute(ANSI),25 W.43rd St.,4th Floor,New York,NY 10036.5Available from Society of Automotive Engineers,400 Commonwealth Ave.,Warrendale,PA 15096.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 3.1.6 lubricity,na qualitative term describing the abilityof a fluid to affect friction between,and wear to,surfaces inrelative motion under load.3.1.6.1 DiscussionIn this test method the lubricity of afluid is evaluated by the minimum applied load in grams that,at any time during the test,will produce a friction coefficientgreater than 0.175 between a stationary ball and a fluid-wettedrotating ring operating under defined conditions.3.1.7 scuffng,nin lubrication,damage caused by instan-taneous localized welding between surfaces in relative motionwhich does not result in immobilization of the parts.3.1.8 scuffng load,nthe load required to p