1、Designation: D 1901 00 (Reapproved 2004)Standard Test Method forRelative Evaporation Time of HalogenatedOrganic Solvents and Their Admixtures1This standard is issued under the fixed designation D 1901; the number immediately following the designation indicates the year oforiginal adoption or, in the
2、 case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.1. Scope1.1 This
3、test method covers the measurement of the relativeevaporation time of halogenated organic solvents and theiradmixtures. This test method is not applicable in the presenceof excessive drafts or high-velocity air currents.1.2 This standard does not purport to address all of thesafety concerns, if any,
4、 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. Terminology2.1 Definition:2.1.1 admixturea blend of a halogenated hydrocarbonwith a nonhalog
5、enated hydrocarbon (for example, mineralspirits).3. Summary of Test Method3.1 The evaporation rate is determined by measuring thetime required for complete evaporation of a thin film of thesolvent from a sheet-metal panel in comparison with a refer-ence standard solvent.4. Significance and Use4.1 Th
6、is test method gives valid comparisons of the evapo-ration rates of the subject materials. These comparisons arerequired for the determination of the suitability of a proposedmaterial for specific cleaning applications.5. Apparatus5.1 Test Panel2A 1 by 100 by 150-mm (0.04 by 4 by6-in.) panel of alum
7、inum, AA Alloy 6061,3Temper T4 or T6,having a horizontal scribe mark across the width of the panel25 mm (1 in.) from one 100-mm edge.5.2 Support Base to hold the panel at 60 6 1 from thehorizontal.5.3 Stopwatch, or electric interval timer.5.4 Graduate, 10-mL, with pouring lip.6. Reagents6.1 Perchlor
8、oethylene, initial boiling point 121C, boilingrange 2C, purity 99%.6.2 p-Xylene,99%.7. Procedure7.1 Place a clean, water-break-free test panel on the supportbase at an angle of 60 6 1 from the horizontal, with the scribemark at the lower end of the panel (Note 1). Using thegraduate, pour 10 mL of th
9、e material under test over the testpanel, being sure to get complete coverage of the entireexposed surface.As soon as the 10 mL of test material has beenpoured, observe the upper edge of the panel for a break in thecontinuity of coverage. Start the timing at the first sign of abreak in liquid film c
10、overage on the upper edge of the panel.Stop the timing when the last portion of film has receded belowthe scribe mark (Note 2). This interval between the first sign ofincomplete coverage and the receding of the last portion of filmbelow the scribe mark is referred to as the “dry time.”1This test met
11、hod 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.Current edition approved Dec. 1, 2004. Published December 2004. Originallyapproved in 1961 as D 1901 61 T. Last prev
12、ious edition approved in 2000 asD 1901 00.2Test panels available from Corrosion Test Supplies, P. O. Box 233, FrenchSettlement, LA, 70733, have been found satisfactory.3Aluminum Association alloy designation in accordance with ASTM Specifica-tion B 209, for Aluminum-Alloy Sheet and Plate, Annual Boo
13、k of ASTM Standards,Vol 02.02.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.NOTE 1By placing a double thickness of paper toweling under the testpanel and support base, solvent runoff from the panel is absorbed. The useof fresh pape
14、r toweling after each individual test prevents saturation of thetest area with solvent vapors and gives more reproducible results.NOTE 2Stray intermittent drafts must be avoided during the timinginterval if reproducible results are to be obtained. Slight, steady air motionwill not appreciably affect
15、 results. The operator must avoid exposure toexcessive concentrations of the test solvent.7.2 Run the test in triplicate, with alternate runs of thematerial under test and the referenced standard solvent (p-xylene or perchloroethylene). The choice of reference solventshall be subject to agreement be
16、tween the purchaser and theseller, but the results reported shall indicate which one wasused.NOTE 3By running the test material against a reference standard, andthereby making the results a measure of relative evaporation time, theinfluences of changes in temperature, relative humidity, and slight d
17、raftsare minimized.8. Calculation8.1 Calculate the relative evaporation time of the testmaterial as follows:Relative evaporation time versus reference solvent5dry time of test materialdry time of reference solvent(1)9. Precision and Bias9.1 RepeatabilityDuplicate results by the same operatorshould n
18、ot be considered suspect unless they differ by morethan 64%.9.2 ReproducibilityThe result submitted by each of twolaboratories should not be considered suspect unless the tworesults differ by more than 65%.NOTE 4The significance of this test method is not lessened by a lackof extreme precision.9.3 B
19、iasThe bias for this test method has not yet beendetermined due to a lack of known standards.10. Keywords10.1 evaporation time; relative evaporation time; water-break testASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedi
20、n 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 mu
21、st be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of th
22、eresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C70
23、0, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).D 1901 00 (2004)2
