ASTM D870 EBOOK DOWNLOAD

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ASTM D Standard Practice for Testing Water Resistance of Coatings Using Water Immersion. ASTM D Edition, February PDF + Print. In Stock. ASTM D Standard Practice for Testing Water Resistance of Coatings Using Water Immersion_机械/仪表_工程科技_专业资料。. failure in hours shall be recorded. ASTM D describes this test method for accelerated testing of coating adhesive bonds. Interior Adhesion. A 6.


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Failure in a water immersion test may be caused by a number of factors including a de?

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The test is therefore useful for evaluating coatings alone or complete coating systems. 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 speci? Continuous over? It is also possible to use very large tanks for testing coated pipe or other large coated products.

Apparatus 5. The cover is not to touch the test specimens. The reason for the cover is to help maintain water temperature and water level.

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The cover should not touch any of the test specimens nor interfere with the air circulation around the specimens. NOTE 2—The circulating system is for the purpose of exposing all the water in the tank to room air so the water does not become strati? Test Specimens 6.

The substrate composition and surface preparation, specimen preparation, and the number of specimens should be agreed upon prior to testing.

Practices D covers application techniques for the production of uniform? Such control specimens can provide warning of changes in test severity in a given apparatus, and can indicate variations in test severity between different apparatuses. Procedure 7.

Reagent water conforming to Type IV of Speci? If no temperature is speci? Maintain the temperature throughout the test. Protect the edges and backs of the specimens from corrosion if these surfaces are not to be tested. Continuous replacement of the water is permitted. If needed , add water to maintain original water level. Rate specimens for changes in color, blistering, etc.

Evaluate specimens no less than 5 min and no more than 10 min after removal from test, as the effects from water exposure can change within a short time. Remove only as many specimens as can be rated within the speci? A recovery period from 12 to 24 h is generally sufficient. The post-recovery rating allows evaluation of the permanent effects of the exposure as distinct from the transient effects, and is especially important for evaluation of color and gloss.

Report 8.

If no temperature is specified, 4. Maintain the dance with this practice should not be represented as being temperature throughout the test.

Protect the edges and backs of the specimens from corrosion if 4. Continuous sition the specimens on a regular basis so that all specimens overflow of the test tank is sometimes required to maintain spend equivalent amounts of time in the various areas of the consistent water quality.

It is also Continuous replacement of the water is permitted. If needed , possible to use very large tanks for testing coated pipe or other add water to maintain original water level. Apparatus after effects from water immersion have been observed. Rate specimens for 5. The changes in color, blistering, etc.

Evaluate specimens no less cover is not to touch the test specimens. The reason for the than 5 min and no more than 10 min after removal from test, cover is to help maintain water temperature and water level.

Remove only as many specimens as can be rated within corrosion-resistant materials. The cover should not touch any the specified time. D A recov- water in the tank to room air so the water does not become stratified and ery period from 12 to 24 h is generally sufficient. The oxygen-depleted at the lower levels. Test Specimens of the exposure as distinct from the transient effects, and is 6.

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The substrate composition and surface preparation, 8. Report specimen preparation, and the number of specimens should be agreed upon prior to testing.

NOTE 3Applicable methods for the preparation of test panels and 8. Practices D covers application techniques for the production of uniform films.

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Such control 8. Keywords between specimens and variations in test conditions within the 9. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility. This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years and if not revised, either reapproved or withdrawn.

Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters.A superscript epsilon e indicates an editorial change since the last revision or reapproval. Technical Data sheet - Interpon ; Feb 18, Format, Pages, Price. Among the tests offered.

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Continuous replacement of the water is permitted. The changes in color, blistering, etc. Water permeates the 2.