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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Summary of Practice 3. The resulting heat transfer causes vapor to condense on the test specimens as liquid water saturated with air. Originally approved in The water quality should be agreed upon between the customer and the supplier for running this test.
Cleveland Condensing Type Cabinet
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 can result in the accumulation of residues in the water pan. Alternative practices for testing water resistance of coatings include Practices DDastmm D Failure in a condensation test may be caused by a number of factors including a de? 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.
Current edition approved June 1, While corrosion products will drain into the water bath, they are not carried into the vapor that condenses on the test specimens.
If the test panels overshadow the upper shelf, do not put test panels on the upper shelf.
Minimum size is mm 3-in. Various types of tape can be used to seal the gaps that develop aetm the specimen deforms. Remove only as many specimens as can be rated within the speci? The substrate composition and surface preparation, specimen preparation, and the number of specimens should be agreed upon prior to testing.
ASTM D 控制冷凝法对涂层耐水性试验方法_百度文库
Work Item s – proposed revisions of this standard. If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below.
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. When removing a specimen for inspection, replace it with a blank so that the test conditions are not altered. 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.
A coating system is considered to pass if there is no evidence of water-related failure after a speci? Coated wood specimens may be mounted in the same way. A coating asfm is considered to pass if there is sstm evidence of water-related failure after a specified period of time.
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. These tests usually result in a pass or fail determination but the degree of failure also may be measured. Certain substrates may deform from the heat and moisture.
Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. Rate specimens for changes in color, blistering, etc. Practice G 53 has been replaced by Practice G It does not specify specimen preparation, speci?
Other temperatures may be used provided that the temperature is reported in conformance with Section 8. Asstm specimens should be mounted to avoid gaps between dd4585 that allow heat and moisture to escape.
The test specimens are inclined so that condensate runs off the test surface by gravity and is replaced by fresh d4558 in a continuous process during the condensate cycle. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other.
If the specimens cannot completely? It does not specify specimen preparation, specific test conditions, or evaluation of results. However, it is possible to test the blister resistance of house paints on wood specimens by mounting the uncoated wood surface axtm the inside of the chamber. Historical Version s – view previous versions of standard.
Maximum thickness is 8 mm 3? This sstm is subject to revision at any time by the responsible technical committee and must be reviewed every? This practice 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 asym ASTM International Headquarters. Vents, approximately 3 to 5 mm 0. Last previous edition approved in as D — The values given in parentheses are for information only.