1.1 This practice covers the basic principles and operating procedures for testing water resistance of coatings by the partial or complete immersion of coated specimens in distilled or de-mineralized water at ambient or elevated temperatures. Although the apparatus and procedure could be employed in immersion tests using solutions of various materials in water, this practice is limited to tests in water alone.
1.2 This practice is limited to the methods of obtaining, measuring, and controlling the conditions and procedures of water immersion tests. It does not specify specimen preparation, specific test conditions, or evaluation of results. NOTE 1—Alternative practices for testing the water resistance of coatings include Practices D1735, D2247, and D4585.
1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.4 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.
1.5 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 D870-15(2020) Referenced Document
ASTM D1193 Standard Specification for Reagent Water
ASTM D1654 Standard Test Method for Evaluation of Painted or Coated Specimens Subjected to Corrosive Environments
ASTM D1730 Standard Practices for Preparation of Aluminum and Aluminum-Alloy Surfaces for Painting
ASTM D1735 Standard Practice for Testing Water Resistance of Coatings Using Water Fog Apparatus
ASTM D2247 Standard Practice for Testing Water Resistance of Coatings in 100% Relative Humidity
ASTM D2616 Standard Test Method for Evaluation of Visual Color Difference With a Gray Scale
ASTM D3359 Standard Test Methods for Measuring Adhesion by Tape Test
ASTM D3363 Standard Test Method for Film Hardness by Pencil Test*, 2022-06-01 Update
ASTM D4541 Standard Test Method for Pull-Off Strength of Coatings Using Portable Adhesion Testers
ASTM D4585 Standard Practice for Testing Water Resistance of Coatings Using Controlled Condensation
ASTM D609 Standard Practice for Preparation of Cold-Rolled Steel Panels for Testing Paint, Varnish, Conversion Coatings, and Related Coating Products*, 2022-06-01 Update
ASTM D610 Standard Test Method for Evaluating Degree of Rusting on Painted Steel Surfaces
ASTM D714 Standard Test Method for Evaluating Degree of Blistering of Paints
ASTM D823 Standard Practices for Producing Films of Uniform Thickness of Paint, Varnish, and Related Products on Test Panels
ASTM D870-15(2020) history
2020ASTM D870-15(2020) Standard Practice for Testing Water Resistance of Coatings Using Water Immersion
2015ASTM D870-15 Standard Practice for Testing Water Resistance of Coatings Using Water Immersion
2009ASTM D870-09 Standard Practice for Testing Water Resistance of Coatings Using Water Immersion
2002ASTM D870-02 Standard Practice for Testing Water Resistance of Coatings Using Water Immersion
1997ASTM D870-97 Standard Practice for Testing Water Resistance of Coatings Using Water Immersion