ASTM D/DM: Standard Practice for Testing Water Resistance of Coatings Using Controlled Condensation. Designation: D – 07 Standard Practice for Testing Water Resistance of Coatings Using Controlled Condensation1 This standard is issued. ASTM D/DM Standard Practice for Testing Water Resistance of Coatings Using Controlled Condensation. standard by ASTM.
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Originally approved in These tests usually result in a pass or fail determination but the degree of failure also may be measured. A superscript epsilon e indicates an editorial change since the last revision or reapproval.
If the specimens cannot completely? Failure in a condensation test may be caused by a number of factors including a de? The substrate composition and surface preparation, specimen preparation, and the number of specimens should be agreed upon prior to testing.
Automatic drying requires the apparatus described in 5. When removing a specimen for inspection, replace it with a blank so that the test conditions are not altered. ASTM International asmt no position respecting the asttm of any patent rights asserted in connection with any item mentioned in this standard.
Work Item s – proposed revisions of this standard. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm. The water quality should be agreed upon between the customer and the supplier for running this test.
Locate the chamber away from air vents and direct drafts.
ASTM D 控制冷凝法对涂层耐水性试验方法_百度文库
Failure in a condensation test may be x4585 by a number of factors including a deficiency in the coating itself, contamination of the substrate, or inadequate surface preparation.
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.
The specimens should be mounted to avoid gaps between specimens that allow heat and moisture to escape.
Remove only as many specimens as can be rated within the speci? If the test panels overshadow the upper shelf, do not put test panels on the upper shelf. The test specimens are inclined so that condensate runs off the test surface by gravity and is replaced by fresh condensate in a continuous process during the condensate cycle.
Cleveland Condensing Type Cabinet
Alternative practices for testing water resistance of coatings include Practices DDand D Such control specimens can provide warning of changes in test severity in a given apparatus, and can indicate variations in test severity astk different apparatuses.
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. 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.
However, it is possible to test the blister resistance of house coatings on wood specimens by mounting the uncoated wood surface facing the inside of the chamber. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.
Asym test is therefore useful for evaluating coatings alone or complete coating systems.
Do not leave the astk in the apparatus at the conclusion of the test as the specimens can remain wet for hours, or even days, when the apparatus is turned off. This 4d585 is derived from research of the Cleveland Society for Coatings Technology. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. Check the samples periodically to make sure condensation is occurring.
NOTE 4—A 3 mm glass plate in place of a sample will work to monitor whether condensation is occurring. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. D585 usually seals cracks or holes smaller than 1 mm 0. Certain substrates may deform from the heat and moisture. This practice is derived from research of the Cleveland Society for Coatings Technology.