1、Designation: D1901 10Standard Test Method forRelative Evaporation Time of HalogenatedOrganic Solvents and Their Admixtures1This standard is issued under the fixed designation D1901; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, t
2、he 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 Department of Defense.1. Scope1.1 This test method covers th
3、e 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 The values stated in SI units are to be regarded asstandard. No other units of measurement are in
4、cluded 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. Terminology2.1 Definition:2.1.1 admixturea blend of a halogenated hydrocarbonwith a nonhalogenated 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
6、from a sheet-metal panel in comparison with a refer-ence standard solvent.4. Significance and Use4.1 This 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
7、cleaning applications.5. Apparatus5.1 Test PanelA 1 by 100 by 150-mm panel of aluminum,AA Alloy 6061,2Temper T4 or T6, having a horizontal scribemark across the width of the panel 25 mm from one 100-mmedge.5.2 Support Base to hold the panel at 60 6 1 from thehorizontal.5.3 Stopwatch, or electric int
8、erval timer.5.4 Graduate, 10-mL, with pouring lip.6. Reagents6.1 Perchloroethylene, 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 a
9、t the lower end of the panel (Note 1). Using thegraduate, pour 10 mL of the 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
10、of coverage. Start the timing at the first sign of abreak in liquid film coverage 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
11、 filmbelow the scribe mark is referred to as the “dry time.”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 paper toweling after each individual test prevents saturation of thetest area with solven
12、t vapors and gives more reproducible results.NOTE 2Stray intermittent drafts must be avoided during the timing1This 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
13、Methods.Current edition approved Feb. 1, 2010. Published February 2010. Originallyapproved in 1961 as D1901 61 T. Last previous edition approved in 2000 asD1901 00(2004). DOI: 10.1520/D1901-10.2Aluminum Association alloy designation in accordance with ASTM Specifica-tion B209, for Aluminum-Alloy She
14、et and Plate, Annual Book of ASTM Standards,Vol 02.02.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.interval if reproducible results are to be obtained. Slight, steady air motionwill not appreciably affect results. The operator mus
15、t 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 between the purchaser and th
16、eseller, 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 draftsare minimized.8. Calc
17、ulation8.1 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 not be considered suspect u
18、nless 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 BiasThe bias for this test
19、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 mentionedin this standard. Users of
20、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
21、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 theresponsible technical com
22、mittee, 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 C700, West Conshohocken, PA 1
23、9428-2959,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). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).D1901 102
