ASTM D1901-10(R2020) pdf free download

ASTM D1901-10(R2020) pdf free download.Standard Test Method for Relative Evaporation Time of Halogenated Organic Solvents and Their Admixtures
1. Scope
1.1 This test method covers the measurement of the relative evaporation time of halogenated organic solvents and their admixtures. This test method is not applicable in the presence of excessive drafts or high-velocity air currents. 1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appro- priate safety, health, and environmental practices and deter- mine the applicability ofregulatory limitations prior to use. 1.4 This international standard was developed in accor- dance with internationally recognized principles on standard- ization established in the Decision on Principles for the Development of International Standards, Guides and Recom- mendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
4. Summary of Test Method
4.1 The evaporation rate is determined by measuring the time required for complete evaporation of a thin film of the solvent from a sheet-metal panel in comparison with a refer- ence standard solvent.
5. Significance and Use
5.1 This test method gives valid comparisons of the evapo- ration rates of the subject materials. These comparisons are required for the determination of the suitability of a proposed material for specific cleaning applications.
6. Apparatus
6.1 Test Panel—A 1 mm by 100 mm by 150 mm panel of aluminum, AA Alloy 6061, 3 Temper T4 or T6, having a horizontal scribe mark across the width of the panel 25 mm from one 100 mm edge. 6.2 Support Base to hold the panel at 60 6 1° from the horizontal. 6.3 Stopwatch, or electric interval timer. 6.4 Graduate, 10 mL, with pouring lip.
8. Procedure
8.1 Place a clean, water-break-free test panel on the support base at an angle of60 6 1° from the horizontal, with the scribe mark at the lower end of the panel (Note 1). Using the graduate, pour 10 mL of the material under test over the test panel, being sure to get complete coverage of the entire exposed surface. As soon as the 10 mL oftest material has been poured, observe the upper edge of the panel for a break in the continuity of coverage. Start the timing at the first sign of a break in liquid film coverage on the upper edge of the panel. Stop the timing when the last portion offilm has receded below the scribe mark (Note 2). This interval between the first sign of incomplete coverage and the receding ofthe last portion offilm below the scribe mark is referred to as the “dry time.” N OTE 1—By placing a double thickness ofpaper toweling under the test panel and support base, solvent runofffrom the panel is absorbed. The use offresh paper toweling after each individual test prevents saturation ofthe test area with solvent vapors and gives more reproducible results. N OTE 2—Stray intermittent drafts must be avoided during the timing interval ifreproducible results are to be obtained. Slight, steady air motion will not appreciably affect results. The operator must avoid exposure to excessive concentrations of the test solvent. 8.2 Run the test in triplicate, with alternate runs of the material under test and the referenced standard solvent (p- xylene or perchloroethylene). The choice of reference solvent shall be subject to agreement between the purchaser and the seller, but the results reported shall indicate which one was used. N OTE 3—By running the test material against a reference standard, and thereby making the results a measure of relative evaporation time, the influences of changes in temperature, relative humidity, and slight drafts are minimized.