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Description of ASTM-D7334 2013ASTM D7334-08-Reapproved2013Historical Standard: Standard Practice for Surface Wettability of Coatings, Substrates and Pigments by Advancing Contact Angle MeasurementASTM D7334Scope 1.1 This practice covers the measurement of the angle of contact when a drop of liquid is applied to a coated surface, substrate, or preformed disk of pigment. 1.2 There are two types of contact angles, advancing and receding. This standard deals only with advancing contact angles. 1.3 This practice is intended to supplement the manufacturer’s instructions for the device being used to make the measurements, but is not intended to replace them. 1.4 A common test liquid is water, but many other liquids such as solvents, surfactant and dispersant solutions and even liquid paints can be used. 1.5 This practice is based on goniometry, which involves the observation of a sessile drop of test liquid on a solid substrate. 1.6 Although contact angles are governed by surface tension, this standard cannot be used to measure surface tension directly. 1.7 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. 1.8 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 and health practices and determine the applicability of regulatory limitations prior to use. Keywords advancing contact angles; contact angles; surface tensions; wettability; wettings ICS Code ICS Number Code 87.040 (Paints and varnishes) DOI: 10.1520/D7334-08R13 This book also exists in the following packages...Subscription InformationMADCAD.com ASTM Standards subscriptions are annual and access is unlimited concurrency based (number of people that can access the subscription at any given time) from single office location. For pricing on multiple office location ASTM Standards Subscriptions, please contact us at info@madcad.com or +1 800.798.9296.
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About ASTMASTM International, formerly known as the American Society for Testing and Materials (ASTM), is a globally recognized leader in the development and delivery of international voluntary consensus standards. Today, some 12,000 ASTM standards are used around the world to improve product quality, enhance safety, facilitate market access and trade, and build consumer confidence. ASTM’s leadership in international standards development is driven by the contributions of its members: more than 30,000 of the world’s top technical experts and business professionals representing 150 countries. Working in an open and transparent process and using ASTM’s advanced electronic infrastructure, ASTM members deliver the test methods, specifications, guides, and practices that support industries and governments worldwide. |
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