ASTM F21-20 PDF

Scope: 1.1 This test method covers the detection of the presence of hydrophobic (nonwetting) films on surfaces and the presence of hydrophobic organic materials in processing environments. When properly conducted, the test will enable detection of fractional molecular layers of hydrophobic organic contaminants. On very rough or porous surfaces, the sensitivity of the test may be significantly decreased. 1.2 Units—The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are provided for information only and are not considered 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 appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

ASTM F21-20 Referenced Document

ASTM C813 Standard Test Method for Hydrophobic Contamination on Glass by Contact Angle Measurement
ASTM D1193 Standard Specification for Reagent Water
ASTM D351 Standard Classification for Natural Muscovite Block Mica and Thins Based on Visual Quality
ASTM D5946 Standard Test Method for Corona-Treated Polymer Films Using Water Contact Angle Measurements
ASTM D7334 Standard Practice for Surface Wettability of Coatings, Substrates and Pigments by Advancing Contact Angle Measurement*， 2022-01-01 Update
ASTM D7490 Standard Test Method for Measurement of the Surface Tension of Solid Coatings, Substrates and Pigments using Contact Angle Measurements*， 2022-01-01 Update
ASTM F22 Standard Test Method for Hydrophobic Surface Films by the Water-Break Test

2020 ASTM F21-20 Standard Test Method for Hydrophobic Surface Films by the Atomizer Test
2014 ASTM F21-14 Standard Test Method for Hydrophobic Surface Films by the Atomizer Test
1965 ASTM F21-65(2007) Standard Test Method for Hydrophobic Surface Films by the Atomizer Test
1965 ASTM F21-65(2002) Standard Test Method for Hydrophobic Surface Films by the Atomizer Test
2002 ASTM F21-65(1996) Standard Test Method for Hydrophobic Surface Films by the Atomizer Test