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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Link to Active This link will always route to the current Active version of the standard. Do not leave the specimens 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. Remove only as many specimens as can be rated within the speci? 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.
Combining values from the two systems may result in non-conformance with the standard. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.
The specimens should be mounted to avoid d45885 between specimens that allow heat and moisture to escape. Drying periods should be at least 4 h long. 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.
Alternative practices for testing water resistance of coatings include Practices DDand D Condensation is produced by exposing one surface of a coated specimen to a heated, saturated mixture of air and water vapor, while the reverse side of the specimen is exposed to the cooling effect of room temperature air.
Minimum size is mm 3-in. ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. The specimens form the roof or walls of the test chamber so that the back sides of the specimens are exposed to the cooling effects of room temperature air.
A coating system is considered to pass if there is no evidence of water-related failure after s4585 speci?
ASTM D 控制冷凝法对涂层耐水性试验方法_百度文库
Practice G 53 has been replaced by Practice G Check the samples periodically to make sure condensation is occurring. 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. If the specimens cannot completely? It does not specify specimen preparation, speci?
For manual drying of specimens, remove them from the apparatus. However, it is possible to test the blister resistance of house paints on wood specimens by mounting the uncoated wood surface facing the inside of the chamber. These tests usually result in a pass or fail determination but the degree of failure also may be measured.
Vents, approximately 3 to 5 mm 0. While corrosion products will drain into the water bath, they are not carried into the vapor that condenses on the test specimens.
Mount coated metal panels with the coating to be tested facing the inside of the chamber. The resulting heat transfer causes vapor to condense on the test specimens as liquid water saturated with air.
Condensate usually seals cracks or holes smaller than 1 mm 0. A superscript epsilon e indicates an editorial change since the last revision or reapproval.
The removal of specimens for inspections during operation is permitted. Rate specimens for changes in color, blistering, etc.
Cleveland Condensing Type Cabinet
While corrosion products will drain into the water bath, they are not carried into the vapor that condenses on the test specimens. Locate the chamber away from air vents and direct drafts. Other temperatures may be used provided that the temperature is reported in conformance with Section 8.
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. Originally approved in d458 Summary of Practice 3. The quality of the water in the pan does not affect the test since the evaporation and condensation process yields distilled water, but the use of tap water d585 result in the accumulation of residues in the water pan. This standard is subject to revision at any time by the responsible technical committee and must be reviewed every?
The test is therefore useful for evaluating coatings alone or complete coating systems. Current edition approved June 1, It is the responsibility of the user of this standard to establish appropriate aetm and health practices and determine the applicability of regulatory limitations prior to use. NOTE 4—A 3 mm glass plate in place of a sample will work to monitor whether condensation is occurring.