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Description of ASTM-D870 2009ASTM D870 - 09Standard Practice for Testing Water Resistance of Coatings Using Water ImmersionActive Standard ASTM D870 | Developed by Subcommittee: D01.27 Book of Standards Volume: 06.01 ASTM D870Significance and Use Immersion in water can cause the degradation of coatings. Knowledge on how a coating resists water immersion is helpful in predicting its service life. Failure in a water immersion test may be caused by a number of factors including a deficiency in the coating itself, contamination of the substrate, or inadequate surface preparation. The test is therefore useful for evaluating coatings alone or complete coating systems. Water immersion tests are used for research and development of coatings and substrate treatments, specification acceptance, and quality control in manufacturing. These tests typically result in a pass or fail determination, but the degree of failure may also be measured. A coating system is considered to pass if there is no evidence of water-related failure after a specified period of time. Results obtained from water immersion tests in accordance with this practice should not be represented as being equivalent to a period of exposure to water in the natural environment, until the degree of quantitative correlation has been established for the coating or coating system. Corrosion tests of a scribed coating on a ferrous substrate are impractical in water immersion tests as the corrosion products tend to contaminate the water bath. Continuous overflow of the test tank is sometimes required to maintain consistent water quality. The apparatus for the test is relatively inexpensive and can be as simple as a glass beaker with a stirrer. It is also possible to use very large tanks for testing coated pipe or other large coated products. 1. Scope 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 1Alternative practices for testing the water resistance of coatings include Practices D 1735 , D 2247 , and D 4585 . 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 and health practices and determine the applicability of regulatory limitations prior to use.
ASTM Standards D609 Practice for Preparation of Cold-Rolled Steel Panels for Testing Paint, Varnish, Conversion Coatings, and Related Coating Products D610 Practice for Evaluating Degree of Rusting on Painted Steel Surfaces D714 Test Method for Evaluating Degree of Blistering of Paints D823 Practices for Producing Films of Uniform Thickness of Paint, Varnish, and Related Products on Test Panels D1193 Specification for Reagent Water D1654 Test Method for Evaluation of Painted or Coated Specimens Subjected to Corrosive Environments D1730 Practices for Preparation of Aluminum and Aluminum-Alloy Surfaces for Painting D1735 Practice for Testing Water Resistance of Coatings Using Water Fog Apparatus D2247 Practice for Testing Water Resistance of Coatings in 100 % Relative Humidity D2616 Test Method for Evaluation of Visual Color Difference With a Gray Scale D3359 Test Methods for Measuring Adhesion by Tape Test D3363 Test Method for Film Hardness by Pencil Test D4541 Test Method for Pull-Off Strength of Coatings Using Portable Adhesion Testers D4585 Practice for Testing Water Resistance of Coatings Using Controlled Condensation Keywords adhesion; blistering; immersion; resistance-water; rust; Blistering; Exposure tests--organic coatings; Immersion--coatings; Lacquer; Organic coatings; Rust; Varnishes; Water immersion testing; Water resistance; ICS Code ICS Number Code 25.220.20 (Surface treatment) DOI: 10.1520/D0870-09 ASTM International is a member of CrossRef. ASTM D870The following editions for this book are also available...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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