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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Various types of tape can be used to seal the gaps that develop when the specimen deforms. A number in parentheses indicates the year of last reapproval. 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. It does not specify specimen preparation, astmm 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 asm.
When removing a specimen for inspection, replace it with a blank so that the test conditions are not altered. This practice is derived from research of the Cleveland Society for Coatings Technology. Materials thicker than 8 mm 3? Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters.
ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard.
Link to Active This link will always route to the current Active version of the standard. Certain substrates may deform from the heat and moisture. For manual drying of specimens, remove them from the apparatus. Combining values from the two systems may result in non-conformance with the standard.
The removal of specimens for inspections during operation is permitted. These tests usually result in a pass or fail determination but the degree of failure also may be measured. Aatm only as many specimens as can be rated within the speci? Work Item s – proposed revisions of this standard.
Do not leave d585 specimens in the apparatus at the conclusion of the test as the specimens can remain wet for hours, or even days, d5485 the apparatus is turned off.
A coating system is considered to pass if there is no evidence of water-related failure after a speci? The resulting heat transfer causes vapor to condense on the test specimens as liquid water saturated with air. 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.
The test specimens are inclined so that condensate runs off the test surface by gravity aztm is replaced by fresh condensate in a continuous process during the condensate cycle.
Failure in a condensation test may be caused by a number of factors including a deficiency in the coating itself, contamination of the substrate, or inadequate surface preparation.
This practice is derived from research of the Cleveland Society for Coatings Technology. While corrosion products will drain into the water bath, they are not carried into the vapor that condenses on the test specimens.
Practice G 53 has been replaced by Practice G Mount coated metal panels with the coating to be tested facing the inside of the chamber.
Condensate usually seals cracks or holes smaller than 1 mm 0.
ASTM D 控制冷凝法对涂层耐水性试验方法_百度文库
Current edition approved June 1, Last previous edition approved in as D — Approved June 1, NOTE 4—A 3 mm glass plate in place of a sample asm work to monitor whether condensation is occurring. However, it is possible to test the blister resistance of house coatings on wood specimens by mounting the uncoated adtm surface facing the inside of the chamber.
The values given in parentheses are for information only. The water quality should be agreed upon between the customer and the supplier for running this test.
Cleveland Condensing Type Cabinet
It does not specify specimen preparation, specific test conditions, or evaluation of results. Automatic drying requires the apparatus described in 5. A coating system is considered to pass if there is no evidence of water-related failure after a specified period of time.
Alternative practices for testing water resistance of coatings include Practices DDand D Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm. This standard is subject to revision at any time by the responsible technical committee and must be reviewed every?
ASTM International – Standard References for ASTM D / DM – 18
These tests usually result in a pass or fail determination but the degree of failure also may be measured. A recovery period from 12 to 24 h is generally sufficient.
Other temperatures may be used provided that the temperature is reported in conformance with Section 8. Rate specimens for changes in color, blistering, ast.
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