1、Designation:D331606(Reapproved 2011)Standard Test Method forStability of Perchloroethylene with Copper1This standard is issued under the fixed designation D3316;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revisio
2、n.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 corrosive-ness to copper metal by perchloroethylene.1.2 The values stated in SI units are
3、 to be regarded asstandard.No other units of measurement are included in thisstandard.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
4、determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2E200 Practice for Preparation,Standardization,and Storageof Standard and Reagent Solutions for Chemical Analysis3.Summary of Test Method3.1 Clean copper strips are subjected to the action of
5、 liquidand vapor phases of boiling perchloroethylene for 72 h in thepresence of light.Weight loss of copper strips and acidformation are determined at the end of the test period.4.Significance and Use4.1 This test method is to be used as a guide in selecting oreliminating certain grades of perchloro
6、ethylene used for dry-cleaning fabrics or degreasing metal parts.5.Apparatus5.1 Flask,300-mL,24/40 standard-taper joint.5.2 Soxhlet Extractor,30-mm inside diameter,24/40standard-taper bottom joint,34/45 standard-taper upper joint.5.3 Allihn Condenser,bulb type,34/45 standard-taper bot-tom joint.5.4
7、Bottle,wide-mouth,8 oz.5.5 Funnel,8-mm outside diameter stem,35-mm diameteropening.5.6 Heater,variable control.5.7 Light Bulb,100 W.5.8 Beaker,400 mL.5.9 Analytical Balance.6.Reagents and Materials6.1 Purity of ReagentsReagent grade chemicals shall beused in all tests.Unless otherwise indicated,it i
8、s intended thatall reagents shall conform to the specifications of the Commit-tee on Analytical Reagents of the American Chemical Society,where such specifications are available.3Other grades may beused,provided it is first ascertained that the reagent is ofsufficiently high purity to permit its use
9、 without lessening theaccuracy of the determination.6.2 Purity of WaterUnless otherwise indicated,referencesto water shall be understood to mean distilled water or water ofequal purity.6.3 Acetone,practical grade.6.4 Copper,electrolytic foil,0.05 mm thick.Cut threecopper strips,20 by 75 mm.Immerse t
10、he strips in concentratedHCl until the surface is bright and free of tarnish.Scribeconsecutive identification numbers on the strips.Rinse thor-oughly in running water and dry with a towel.Weigh the stripsto the nearest 0.1 mg on an analytical balance.6.5 Hydrochloric Acid(sp gr 1.19)Concentrated hyd
11、ro-chloric acid(HCl).Handle the concentrated HCl solution asindicated in the suppliers direction.1This test method is under the jurisdiction of ASTM Committee D26 onHalogenated Organic Solvents and Fire Extinguishing Agents and is the directresponsibility of Subcommittee D26.04 on Test Methods.Curre
12、nt edition approved Aug.1,2011.Published November 2011.Originallyapproved in 1974.Last previous edition approved in 2006 as D3316 06.DOI:10.1520/D3316-06R11.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMSt
13、andards volume information,refer to the standards Document Summary page onthe ASTM website.3Reagent Chemicals,American Chemical Society Specifications,AmericanChemical Society,Washington,DC.For suggestions on the testing of reagents notlisted by the American Chemical Society,see Analar Standards for
14、 LaboratoryChemicals,BDH Ltd.,Poole,Dorset,U.K.,and the United States Pharmacopeiaand National Formulary,U.S.Pharmacopeial Convention,Inc.(USPC),Rockville,MD.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 6.6 Sodium Hydroxide,Standard So
15、lution(0.01 N 60.001)Dissolve 0.4 6 0.04 g of anhydrous sodium hydroxide(NaOH)in 1 L of water and standardize in accordance withPractice E200.6.7 Phenolphthalein IndicatorDissolve 5 g of phenol-phthalein in 500 mL of 95%ethanol,dilute to 1 L withdistilled water,and mix thoroughly.7.Procedure7.1 Clea
16、n the flask and Soxhlet extractor with soap andwater.Should any residue be present,clean thoroughly withacid and rinse with water.Flush out the condenser with water.Rinse the flask,Soxhlet,and condenser with acetone and dryby means of a stream of filtered air.7.2 Place one of the strips in the flasks,one in the Soxhlet,and the third in the condenser.Bend the condenser striplengthwise in the form of a U and force it into the condenser sothat approximately half of it is inside.Measure 100 mL of th
