ASTM_D_8447_-_22e1.pdf

Designation:D8447221Standard Test Method forDetermination of Turbo Charger Deposits by Thermo-Oxidation Engine Oil Simulation Test1This standard is issued under the fixed designation D8447;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.1NOTEEditorially corrected 1.1 in May 2022.1.Scope1.1 This test method covers the procedure to determine theamount of deposits formed by automotive engine oils utilizingthe thermo-oxidation engine oil simulation test(TEOST2).3The range and applicability of the TEOST Turbo2test methodas derived from an interlaboratory study is approximately 5 mgto 90 mg.However,experience indicates that deposit levels ofup to 150 mg or greater can be obtained.1.2 This test method uses a patented instrument,method andpatented,numbered,and registered depositor rods traceable tothe manufacturer4and made specifically for the practice andprecision of the test method.1.3 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.3.1 Milligrams(mg),grams(g),milliliters(mL),and liters(L)are the units provided because they are an industryaccepted standard.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,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.5 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Terminology2.1 Definitions of Terms Specific to This Standard:2.1.1 ceramic isolator,nthe fitting that compresses theO-ring into the depositor rod casing and isolates the depositorrod casing from the voltage applied to the depositor rod.2.1.2 depositor rod4,na patented,specially made,numbered,and registered steel rod(used once for each test)onwhich the deposits are collected;it is resistively heated andcontrolled by a thermocouple inserted to a pre-determineddepth in the hollow rod.2.1.3 drain tube,nthe tube connecting the lower end capof the glass mantle to the reactor chamber.2.1.4 end cap,nthe fitting used to tighten the ceramicisolators onto the O-rings at both ends of the glass mantle.2.1.5 filter deposits,nthe mass in milligrams of thedeposits collected after test on a special multi-layer filtercartridge used once for each test.2.1.6 glass mantle,nthe glass sleeve that surrounds thedepositor rod.2.1.7 pump,nthe gear pump that is used to control theflow rate of the test oil through the depositor rod casing.2.1.8 pump inlet tube,nthe tube connecting the reactorchamber to the pump.2.1.9 pump outlet tube,nthe tube connecting the pump tothe glass mantle.2.1.10 reactor chamber,nthe heated reservoir that con-tains the 20 mL test oil sample circulated past the deposit rodduring the test;the reactor is equipped with a magnetic stir-barto continuously mix the chamber contents.2.1.11 rod deposits,nthe mass,in milligrams,of thedeposits collected on the depositor rod.2.1.12 rod O-rings,nthe O-rings that seal the outside ofthe rod and the depositor rod casing to prevent sample leaks.1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products,Liquid Fuels,and Lubricants and is the direct responsibility ofSubcommittee D02.09 on Oxidation of Lubricants.Current edition approved April 1,2022.Published May 2022.DOI:10.1520/D8447-22E01.2TEOST and TEOST Turbo are registered trademarks of the Tannas Co.,4800James Savage Rd.,Midland,MI 48642.3The Development of Thermo-Oxidation Engine Oil Simulation Test(TEOST),Society of Automotive Engineers(SAE No.932837),400 Commonwealth Dr.,Warrendale,PA 15096-0001.4The sole source of supply of the item known to the committee at this time isTannas Co.,4800 James Savage Rd.,Midland,MI 48642.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,which you may attend.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.12.1.13 thermocouple lock collar,na fitting that tightens onthe thermoc