ASTM_D_7393_-_07_2012.pdf

Designation:D739307(Reapproved 2012)Standard Practice forIndicating Oil in Abrasives1This standard is issued under the fixed designation D7393;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 practice is used to determine the presence of oil inabrasives used for abrasive blast cleaning.1.2 The procedure can be used in the laboratory,field orfabrication shop.1.3 The values stated in SI units are to be regarded as thestandard.The values given in parentheses are for informationonly.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.2.Referenced Documents2.1 ASTM Standards:2D4940 Test Method for Conductimetric Analysis of WaterSoluble Ionic Contamination of Blasting Abrasives2.2 SSPC Standards:3SSPC-AB1 Mineral and Slag AbrasivesSSPC-AB2 Cleanliness of Recycled Ferrous Metallic Abra-siveSSPC-AB3 Ferrous Metallic Abrasive3.Summary of Practice3.1 A sample of the abrasive is placed in a container,covered with water and vigorously shaken.The presence of anoil sheen or oil drops on the surface is cause for rejection of thesupply being tested.4.Significance and Use4.1 Oil in abrasives can be transferred to the surface beingcleaned,thus contaminating it.This can cause film defects,affect adhesion of the coating applied over it,and ultimateperformance of the coating system.4.2 Oil in abrasives is one of the cleanliness tests requiredfor mineral and slag abrasives in SSPC-AB1,for recycledferrous abrasives in SSPC-AB2,and for new ferrous abrasivesin SSPC-AB3.4.3 Other contaminants in abrasive such as chemical con-taminants or particulate matter require other methods fordetection such as Test Method D4940 for ionic contaminants.The ratio of abrasive to water is different for this test,so thesolution from evaluating the oil in abrasive should not be usedfor Test Method D4940.5.Apparatus and Materials5.1 ContainerClear jar or bottle capable of holding 250ml(8.5 floz)or more and with a lid that is capable of sealingthe contents.5.2 WaterPotable.6.Procedure6.1 Place a sample of the abrasive in a clean container toabout half its height.6.2 Add water to a level at least 2.5 cm(1 in.)above the topof the abrasive.The water temperature shall be between 20 and35C(68 and 95F).6.3 Cover the container and shake vigorously for one min.6.4 Remove the cover from the container and let it sit for 5min.6.5 Examine the surface of the water for oil droplets or oilsheen.6.6 If oil is detected,retest after cleaning a abrasive.7.Testing Frequency7.1 The testing frequency shall be agreed to by the pur-chaser and seller.A suggested testing frequency is:7.1.1 Three tests per shipment for bulk delivery.7.1.2 One test per 50 bags for bag delivery,or one test if thedelivery is less than 50 bags.1This practice is under the jurisdiction of ASTM Committee D01 on Paint andRelated Coatings,Materials,and Applications and is the direct responsibility ofSubcommittee D01.46 on Industrial Protective Coatings.Current edition approved June 1,2012.Published August 2012.Originallyapproved in 2007.Last previous edition approved in 2007 as D7073 07.DOI:10.1520/D7393-07R12.2For 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.3Available from Society for Protective Coatings(SSPC),40 24th St.,6th Floor,Pittsburgh,PA 15222-4656,http:/www.sspc.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 7.1.3 One sample per shift on days that blasting is per-formed for recycled abrasive.8.Interpretation of Results8.1 The presence of an oil sheen or oil droplets indicatescontamination.The abrasive should be cleaned before use ordiscarded.9.Report9.1 Report the abrasive manufacturer,brand name of theproduct,size designation,lot/batch number,and test results.10.Keywords10.1 abrasive;contaminants;oil contaminationASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard.Users of this standard are expressly advised that determination of the validity of any such patent rights,and the riskof infringement of such rights,are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised,either reapproved or withdrawn.Your comments are invited either for revision of this st