ASTM_D_1662_-_08_2014.pdf

Designation:D166208(Reapproved 2014)Standard Test Method forActive Sulfur in Cutting Oils1This standard is issued under the fixed designation D1662;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.Scope*1.1 This test method covers the determination of activesulfur in cutting oils.This test method applies to sulfur reactivewith copper powder at a temperature of 150C(302F)incutting fluids containing both natural and added sulfur.NOTE1It has not been established by ASTM Subcommittee D02.L0as to how the active sulfur content thus determined may relate to fieldperformance of the cutting fluid.1.2 The values stated in SI units are to be regarded as thestandard.The values given in parentheses are for informationonly.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 practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D130 Test Method for Corrosiveness to Copper from Petro-leum Products by Copper Strip Test3.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 active sulfursulfur in a cutting fluid that will reactwith metallic copper at a temperature of 150C(302F)underthe prescribed conditions.4.Summary of Test Method4.1 Aportion of the sample is treated with copper powder at150C(302F).The copper powder is filtered from the mixture.Active sulfur is expressed as the difference between the sulfurcontents of the sample,as determined before and after treat-ment with copper.5.Significance and Use5.1 This test method measures the quantity of sulfur avail-able to react with metallic surfaces to form solid lubricatingaids at the temperature of the test.Rates of reaction are metaltype,temperature,and time dependent.6.Apparatus6.1 Filter Paper,2.5 m retention size.6.2 Stirrer,constructed of glass in the form of an inverted T.A flat blade,approximate length 25 mm,height 6 mm,thickness 1 mm,shall be attached to a glass rod 6 mm indiameter,in such a way that the blade is symmetrical with therod and has its flat surface in the vertical plane.Alternatively,a glass-coated magnetic stirring bar 9.5 by 34.9 6 2 mm(38by138in.)can be used.6.3 Stirring Apparatus,electric motor capable of maintain-ing a speed of 500 6 25 rpm.Alternatively,when using theglass-coated stirring bar,a combination magnetic stirrer-hotplate is required.6.4 Hot Plate,electric,or other convenient heat sourcecapable of maintaining the sample at a temperature of 150 62C(302 6 5F).6.5 Beaker,200-mL,tall-form of heat-resistant glass,with apour-out spout.7.Materials7.1 Diluent,sulfur-free white oil,methyl lardate or dialky-lbenzene.7.2 Copper Powder,99%,75 m(200 mesh).8.Procedure8.1 Determine the sulfur concentration of the sample to betested using any accepted method that has precision of60.15%for sulfur.NOTE2For best results,dilute the sample with sulfur-free white oil,methyl lardate or dialkylbenzene to a sulfur content of 2 to 4%.8.2 Place 50 6 2 g of sample or sample dilution in a200-mL tall-form beaker,lower the stirrer to within 5 mm of1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products,Liquid Fuels,and Lubricants and is the direct responsibility ofSubcommittee D02.L0.01 on Metal Removal Fluids and Lubricants.Current edition approved Jan.1,2014.Published February 2014.Originallyapproved in 1959.Last previous edition approved in 2008 as D166208.DOI:10.1520/D1662-08R14.This test method was prepared under the joint sponsorship of the AmericanSociety of Lubrication Engineers(ASLE)and accepted by ASLE in January 1969.2For 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.*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 the bottom of the beaker and add 5 6 0.25 g of copper powderand heat to 150 6 2C(302 6 5F)while stirring at 500 6 25rpm.If a magnetic stirrer is used,rotate the stirring bar at 5006 25 rpm.When 150 6 2C(302 6 5F)is reached,add anadditional 5 6 0.25 g copper powder.Continue stirring at 1506 2C(302 6 5F)for 30 6 1 min.At the end of this period,stop stirring and insert a copper strip prepared in accordancewith Test Method D130 for 10 6 0.25 min.If there is anyevidence of stain on the strip,recommence stirring and add anadditional 5 6 0.25 g of copper powder.Continue stirring themixture at 150 6 2C for 30 6 1 min.Again,insert a copperstrip as previ