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ASTM C813-90

Standard test method for hydrophobic contamination on glass by contact angle measurement The contact angle test is non-destructive and may be used for control and evaluation of processes for the removal of hydrophobic contaminants. The test may also be used for the detection and control of hydrophobic contaminants in processing ambient. For this application, a surface free of hydrophobic films is exposed to the ambient conditions and is subsequently tested. This test method covers the detection of hydrophobic contamination on glass surfaces by means of contact angle measurements. When properly conducted, the test will enable detection of fractions of monomolecular layers of hydrophobic organic contaminants. Very rough or porous surfaces may significantly decrease the sensitivity of the test.

ASTM D971-12

Standard test method for interfacial tension of oil against water by the ring method Interfacial tension measurements on electrical insulating oils provide a sensitive means of detecting small amounts of soluble polar contaminants and products of oxidation. A high value for new mineral insulating oil indicates the absence of most undesirable polar contaminants. The test is frequently applied to service-aged oils as an indication of the degree of deterioration.

ASTM D1173-07

Standard test method for foaming properties of surface-active agents This test method covers the determination of foaming properties of surface-active agents. Glass tubing apparatus for this test method shall include pipet and a receiver. Apparatus requirements like dimensions, shape, calibration marks, rubber stoppers, etc., shall conform to the specifications as indicated in this standard method. Test solution preparation shall include water preheating, adding the surface-active agent while stirring, and solution aging. Test procedure for foaming properties determination shall be done while the surface-active solution is aging as indicated in this standard test method. The report shall include test solution concentration, temperature, water hardness, and foam height.

ASTM D1331-14

Standard Test Methods for Surface and Interfacial Tension of Solutions of Paints, Solvents, Solutions of Surface-Active Agents, and Related Materials This standard describes test methods to determine the surface tension and interfacial tension of surface-active agents with a tensiometer.

• Method A—Surface Tension by du Noüy ring

• Method B—Interfacial Tension by du Noüy ring

• Method C—Surface Tension by Wilhelmy plate

• Method D—Interfacial Tension by Wilhelmy plate.

ASTM D1417-16

Standard test methods for rubber latices – Synthetic This standard covers the test methods for synthetic rubber lattices ABR, BR, CR, IIR, NBR, NCR, NIR, PBR, PSBR, SBR, SCR, SIR, synthetic rubber lattices with substituted carboxylic acid groups on the polymer chain, and reinforced synthetic rubber lattices. Covered tests include the procedure for collecting samples and determining total solid content, volatile unsaturates content, pH, surface tension, viscosity, coagulum, bound styrene, Mooney viscosity, mechanical stability, polystyrene reinforcement in contained polymer, and residual acrylonitrile content. Each test method contains information on material exceptions, apparatus, and test procedures. This standard refers to ASTM D 1331.

ASTM D1590-60

Test methods for surface tension of water and waste water This standard specifies a method that covers quantitative measurements of the surface tension of water and waste water. The method is based on instrumental measurement by the ring method and offers the most precise and accurate determination.

ASTM D3825-90

Standard test method for dynamic surface tension using the fast bubble technique This test method covers the determination of the specific free energy of a liquid-gas surface a short time after formation of the surface

ASTM D5946-17 (identical to ISO 15989)

Standard test method for corona-treated polymer films using water contact angle measurements The ability of polymer films to retain inks, coatings, adhesives, etc. is primarily dependent on the character of their surfaces and can be improved by one of several surface-treating techniques. The electrical discharge treatment, such as corona treatment, has been found to increase the wetting tension of a polymer film. The stronger the treatment, the more actively the surface reacts with different polar interfaces. It is therefore possible to relate the contact angle of a polymer film surface to its ability to accept and retain inks, coatings, adhesives with the respective polar functionalities. Contact angle in itself is not a completely acceptable measure of adhesion. This test method covers measurement of the contact angle of water droplets on corona-treated polymer film surfaces.

ASTM D7334-08

Standard practice for surface wettability of coatings, substrates and pigments by advancing contact angle measurement This standard is used for characterizing the wettability of surfaces. A surface that is easy to wet is one over which a coating is more likely to give good adhesion and appearance and less likely to suffer surface tension-related defects such as crawling, cratering, pinholing, and orange peel. This standard can also be used to test pigment surfaces for wettability, particularly by potential surfactant- or resin-based dispersants or mill bases. Easily wetted pigments are more likely to be easy to disperse and dispersants/mill bases that wet pigments of interest are more likely to disperse those pigments well.

ASTM D7490-13

Standard test method for measurement of the surface tension of solid coatings, substrates and pigments using contact angle measurements The method described in this standard is based on the concept that the total free energy at a surface is the sum of contributions from different intermolecular forces, such as dispersion, polar, and hydrogen bonding. This test method describes a procedure for the measurement of contact angles of two liquids, one polar and the other nonpolar, of known surface tension on a substrate, pigment (in the form of a disk), or cured or air dried coating in order to calculate the surface properties (surface free energy and its disperse and polar components) of the solid.