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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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Cleveland Condensing Type Cabinet

Work Item s – proposed revisions of this standard. When removing a specimen for inspection, replace it with a blank so that the test conditions are not altered.

Vents, approximately 3 to 5 mm 0. 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. Failure in a condensation test may be caused by a number of factors including a de? 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.

ASTM D 控制冷凝法对涂层耐水性试验方法_百度文库

Historical Version s – view previous versions of standard. Originally approved in 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.

Maximum thickness is 8 mm 3? While corrosion products will drain into the water bath, they are not carried into the vapor that condenses on the test specimens. ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard.

Failure in a condensation test may be caused by a number of factors axtm a deficiency in the coating itself, contamination of the substrate, or inadequate surface asstm.

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It does not specify specimen preparation, speci? A coating system is considered to pass if there is no evidence of water-related failure after a specified period of time. Minimum size is mm 3-in. 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.

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ASTM International – Standard References for ASTM D / DM – 18

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. While corrosion products will drain into the water bath, they are not carried into the vapor that condenses on the test specimens. Approved June 1, Drying periods should be at least 4 h long. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other.

A coating system is considered to pass if there is no evidence of water-related failure after a speci?

The values given in parentheses are for information only. It is the responsibility of the user of this standard to astk appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

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.

Condensate usually seals cracks or holes smaller than 1 mm 0. Alternative practices for testing water resistance of coatings include Practices DDand D A number in parentheses indicates the year of last reapproval. 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.

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The specimens form the roof or walls of the test chamber so that the back sides of the specimens are exposed to f4585 cooling effects of room temperature air.

The resulting heat transfer causes vapor to condense on the test specimens as liquid water saturated with air. NOTE 4—A 3 mm glass plate in place of a sample will work to monitor whether condensation is occurring. A superscript epsilon e indicates an editorial change since the last revision or reapproval. This practice is derived from research of the Cleveland Society for Coatings Technology.

The test is therefore useful for evaluating coatings alone or complete coating systems.

Last previous edition approved in as D — 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. The water quality should be agreed upon between the customer and the supplier for running this s4585.

This standard is subject to revision at any time by the responsible technical committee and must be reviewed every?

Your comments will receive careful consideration at d458 meeting of the responsible technical committee, which you may attend. If the test panels overshadow the upper shelf, do not put test panels on the upper shelf. The quality of the atm 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.