October 16, 2020

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

For manual drying of specimens, remove them from the apparatus. 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. Summary of Practice 3. Other temperatures may be used provided that the temperature is reported in conformance with Section 8. The removal of specimens for inspections during operation is permitted.

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. Rate specimens for changes in color, blistering, etc. NOTE 4—A 3 mm glass plate in place of a sample will work to monitor whether condensation is occurring. 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.

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. 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? The water quality should be agreed upon between the customer and 4d585 supplier for running this test.

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

Certain substrates may deform from the heat and moisture. Locate the chamber away from air vents and direct drafts.

The values given in parentheses are for information only. This practice is derived from research of the Cleveland Society for Coatings Technology. Maximum thickness is 8 mm 3? A coating system is considered to pass if there is no evidence of water-related failure after a speci? 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.

A recovery period from 12 to 24 h is generally sufficient. 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.

Coated wood specimens may be mounted in the same way.

Mount coated metal panels with the coating to be tested facing the inside wstm the chamber. Condensate usually seals cracks or holes smaller than 1 mm 0. 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. Vents, approximately 3 to 5 mm 0. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.


These tests usually result in a pass or fail determination but the degree of failure also may be measured.

Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. The resulting heat transfer causes vapor to condense on the test specimens as liquid water saturated with air.

Check the samples periodically to make sure condensation is occurring. The substrate composition and surface preparation, specimen preparation, and the number of specimens should be agreed upon prior to testing.

Historical Version s – view previous versions of standard. A superscript epsilon e indicates an editorial change since the last revision or reapproval. The test is therefore useful for evaluating coatings alone or complete coating systems. Such control specimens can provide warning of changes in test severity in a given apparatus, and can indicate variations in test severity between different apparatuses.

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. Originally approved in 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.