1、Designation:D225110(Reapproved 2015)Standard Test Method forMetal Corrosion by Halogenated Organic Solvents and TheirAdmixtures1This standard is issued under the fixed designation D2251;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision
2、,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.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope1.1 This test method covers t
3、he evaluation of the corrosive-ness to metals by halogenated organic solvents and theiradmixtures for cold cleaning applications.NOTE1The test method described herein is an adaptation of TestMethod D130.1.2 The values stated in SI units are to be regarded asstandard.No other units of measurement are
4、 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 determine the applica-bility of regulatory limitations prior
5、 to use.2.Referenced Documents2.1 ASTM Standards:2D130 Test Method for Corrosiveness to Copper from Petro-leum Products by Copper Strip TestD235 Specification for Mineral Spirits(Petroleum Spirits)(Hydrocarbon Dry Cleaning Solvent)E2251 Specification for Liquid-in-Glass ASTM Thermom-eters with Low-H
6、azard Precision Liquids3.Summary of Test Method3.1 Polished metal strips are immersed in a given quantityof sample and heated at reflux temperature for 60 min.At theend of this period,the metal strips are removed and examinedfor evidence of corrosion.Similar metal strips are immersed ina given quant
7、ity of sample in closed containers and held atroom temperature for 10 days.At the end of this period,thestrips are removed and examined.4.Significance and Use4.1 These tests are to be used as a guide in selecting oreliminating certain solvents or grades of solvents used forcleaning or degreasing met
8、al parts.5.Apparatus5.1 FlaskErlenmeyer flask,borosilicate glass,125-mLcapacity,with a 24/40 standard-taper joint.5.2 Reflux CondenserCondenser with a 24/40 standard-taper joint,650 mm in length.5.3 BathOil or water bath,for maintaining a temperatureslightly higher than the initial boiling point of
9、the sample.Asupport shall be provided to hold the flask upright.5.4 ThermometerAn ASTM High Distillation Thermom-eter having a range from 30 to 760F and conforming to therequirements for Thermometer 8F or a range from 2 to 400Cconforming to the requirements for Thermometer 8C as pre-scribed in Speci
10、fication E2251 or other thermometer of suitabledesign and range.5.5 Test Tubes,150 mm in length,19 mm in diameter,withstandard-taper,ground-glass stopped.6.Materials6.1 Metal StripsStrips of various metals about12in.(12mm)in width and about 3 in.(76 mm)in length.A suggestedselection of metals includ
11、es copper,brass,aluminum,steel,andgalvanized iron.Other metals likely to be encountered mayalso be used for this test.6.2 Polishing MaterialsSilicon carbide or alumina-gritpaper of varying degrees of fineness including 240-grit siliconcarbide paper or cloth;also a supply of 150-mesh siliconcarbide g
12、rain and pharmaceutical-grade absorbent cotton.6.3 Cleaning SolventNoncorrosive mineral spirits,such asSpecification D235 on hydrocarbon dry cleaning solvent.1This test method is under the jurisdiction of ASTM Committee D26 onHalogenated Organic Solvents and Fire Extinguishing Agents and is the dire
13、ctresponsibility of Subcommittee D26.04 on Test Methods.Current edition approved June 1,2015.Published June 2015.Originallyapproved in 1964 as D2251 64 T.Last previous edition approved in 2010 asD2251-10.DOI:10.1520/D2251-10R15.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcon
14、tact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 7.Preparation of Test Strips
15、7.1 Surface PreparationRemove all surface blemishesfrom both sides of the strip with silicon carbide or alumina-gritpaper of such degree of fineness as needed to accomplish thedesired results efficiently.Finish with 240-grit silicon carbidepaper,removing all marks that may have been made by othergra
16、des of paper used previously.Immerse the strip in noncor-rosive mineral spirits,from which it may be withdrawnimmediately for final polishing,or in which it may be storedfor future use.7.2 Final PolishingRemove a strip from the noncorrosivemineral spirits.Handle only with stainless steel forceps;do nottouch with the fingers.Polish the main surfaces with siliconcarbide grains on absorbent cotton.Rub in the direction of thelong axis of the strip,carrying the stroke beyond the end of thestrip befor
