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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The values given in parentheses are for information only.
This practice is derived from research of the Cleveland Society for Coatings Technology. A recovery period from 12 to 24 h is generally sufficient. Link to Active This link will always route to the current Active version of aztm standard. Check the samples periodically to make sure condensation is occurring. Summary of Practice 3.
ASTM D 控制冷凝法对涂层耐水性试验方法_百度文库
Minimum size is mm 3-in. Various types of tape can be used to seal the gaps that develop when the specimen deforms. This standard is subject to revision at any time by the responsible technical committee and must be reviewed every? A coating system is d485 to pass if there is no evidence of water-related failure after a speci?
Originally approved in Certain substrates may deform from the heat and moisture. 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.
Maximum thickness is 8 mm 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 can result in the accumulation of residues in the water pan.
Cleveland Condensing Type Cabinet
ASTM International takes no position respecting the validity of any patent rights asserted in asm with any item mentioned in this standard. Historical Version s – view previous versions of standard. If the specimens cannot completely? For manual drying of specimens, remove them from the apparatus.
When removing a specimen for inspection, replace it with a blank so that the test conditions are not altered. It does not specify specimen preparation, speci? 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. Combining values from the two systems may result in non-conformance with the standard.
Condensate usually seals cracks or holes smaller than 1 mm 0. Practices D cover application techniques for the production of uniform?
Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility. 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.
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. It is the responsibility of the user of this d5485 to establish appropriate safety, health, and environmental practices and asm the applicability of regulatory limitations prior to use.
It does not specify specimen preparation, ast test conditions, or evaluation of results.
ASTM International – Standard References for ASTM D / DM – 18
Individual reprints single or aztm copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm. The test is therefore useful for evaluating coatings alone or complete coating systems. While corrosion products will drain into the water bath, they are not carried into the vapor that condenses on the test specimens.
The resulting heat transfer causes vapor to condense on the test specimens as liquid water saturated with air.
Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. The water quality should be agreed ast, between the customer and the supplier for running this test. Approved June 1, The specimens asfm be mounted to avoid gaps between specimens that allow heat and moisture to escape. 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.
Work Item s d5485 proposed revisions of this standard.
Locate the chamber away from air vents and direct drafts. These tests usually result in a pass or fail determination but the degree of failure also may be measured. NOTE 4—A 3 mm glass plate in place of awtm sample will work to monitor whether condensation d4558 occurring. A superscript epsilon e indicates an editorial change since the last revision or reapproval.
Materials thicker than 8 mm 3? Practice G 53 has been replaced by Practice G