ASTM_G_122_-_96_2015e1.pdf

Designation:G12296(Reapproved 2015)1Standard Test Method forEvaluating the Effectiveness of Cleaning Agents1This standard is issued under the fixed designation G122;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.1NOTEEditorial correction made in October 2015.INTRODUCTIONMany systems require a high degree of cleanliness.For example,gaseous and liquid oxygensystems must be clean,particularly of hydrocarbons,to avoid the potential hazard of a reaction andsubsequent fire or explosion.Typically,chlorinated solvents have been used to clean systems andequipment that must be free of hydrocarbons and other contaminants.Environmental concerns dictatethat suitable replacements are needed.This test method presents a procedure that may be used toevaluate candidate aqueous or non aqueous cleaning agents.1.Scope1.1 This test method covers a procedure for evaluating thecapability of cleaning agents and processes to remove contami-nation to the desired level.1.2 The test coupons provide a relatively rough surface towhich contamination can easily adhere.1.3 The capability of a particular cleaning agent dependsupon the method by which it is used and the characteristics ofthe article being cleaned,such as size,shape,and material.Final evaluation of the cleaning agent should include testing ofactual products and production process.1.4 The values stated in SI units are to be regarded as thestandard.The values given in parentheses are for informationonly.1.5 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 precau-tionary statements are given in Note 2.2.Referenced Documents2.1 ASTM Standards:2D1193 Specification for Reagent WaterE177 Practice for Use of the Terms Precision and Bias inASTM Test MethodsE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test MethodG94 Guide for Evaluating Metals for Oxygen ServiceG121 Practice for Preparation of Contaminated Test Cou-pons for the Evaluation of Cleaning Agents2.2 ANSI Standard:3D46.1 Surface Texture(Surface Roughness,Waviness,Lay)3.Terminology3.1 Definitions:3.1.1 cleaning effectiveness factor(CEF),nthe fraction ofcontaminant removed from an initially contaminated testcoupon and determined by gravimetric techniques.3.1.2 residual contamination,Rc,nthe absolute mass ofcontaminant remaining after the cleaning process and ex-pressed in milligrams per square centimetre of area or option-ally as milligrams per square foot.3.1.3 surface roughness,RA,nthe arithmetic average de-viation of the surface profile from the centerline,normallyreported in micrometres.1This test method is under the jurisdiction of ASTM Committee G04 onCompatibility and Sensitivity of Materials in Oxygen Enriched Atmospheres and isthe direct responsibility of Subcommittee G04.01 on Test Methods.Current edition approved Oct.1,2015.Published October 2015.Originallyapproved in 1993.Last previous edition approved in 2008 as G122 96(2008).DOI:10.1520/G0122-96R15E01.2For 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 American National Standards Institute(ANSI),25 W.43rd St.,4th Floor,New York,NY 10036,http:/www.ansi.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 4.Summary of Test Method4.1 This test method provides quantitative results as to theability of a specific cleaning agent/process for removingselected contaminants from standard coupons.The couponsused for testing are prepared in accordance with Practice G121.Cleaning is performed using a cleaning tank with or withoutultrasonic agitation,elevated temperature or other cleaningenhancement features and depends on the manufacturersinstructions.The effectiveness of the cleaning process isrepresented as CEF,the cleaning effectiveness factor,that is thefraction of the contaminant removed as determined by gravi-metric techniques.A control coupon is used to account for anycorrosion or material removal effects due to the cleaningagent/process.5.Significance and Use5.1 The purpose of this test method is to define a procedurefor evaluating the capability of cleaning agents to cleanmetallic coupons.Based on the outcome of the testing,suitablecleaning agents may be selected for cleaning in general and foroxygen service in particular.5.2 The cleaning parameters can be changed and the testmethod can be repeated.The