ASTM D4585 PDF
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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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. The resulting heat transfer causes vapor to condense on the test specimens as liquid water saturated with air.
Minimum size is mm 3-in. The test is therefore useful for evaluating coatings alone or complete x4585 systems. The values given in parentheses are for information only. Work Item s – proposed revisions of this standard.
Historical Version s – view previous versions of standard. 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. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental aatm and determine the applicability of regulatory astmm prior to use.
The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. These tests usually result in a pass or fail determination but the degree of failure also may be measured. This practice is derived from research of the Cleveland Society for Coatings Technology.
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 does not specify specimen preparation, specific test conditions, or evaluation of results. Combining values from the two systems may result in non-conformance with the standard.
Rate specimens for changes in d5485, blistering, etc. If the test panels overshadow the upper shelf, do not put test panels on the upper shelf.
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.
Cleveland Condensing Type Cabinet
ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. If you feel that your comments have not received a fair hearing you should make your views aztm to the ASTM Committee on Standards, at the address shown below.
Last previous edition approved in as D — Practices D cover application techniques for the production of uniform? A superscript epsilon e indicates an editorial change since the last revision or reapproval.
Link to Active This link will always route to the current Active version of the standard. Approved June 1, Certain substrates may deform from the heat and moisture. A number in parentheses indicates the year of last reapproval. Condensate usually seals cracks or holes smaller than 1 mm 0. Failure in a condensation test may be caused by a number of factors including a de?
A coating system is considered r4585 pass if there is no evidence of water-related failure after a specified period of time. This practice is derived from research of the Cleveland Society for Coatings Technology. Alternative practices for testing water resistance of coatings include Practices DDand D It does not specify specimen preparation, speci? Referenced Documents purchase separately The astk listed below are referenced within the subject standard but are not provided as part of the standard.
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. Check the samples periodically to make sure condensation is occurring.
The test is therefore useful for evaluating coatings alone or complete coating systems. A recovery period from 12 to 24 h is generally sufficient.
While corrosion products will drain into the water d45885, they are not carried into the vapor that condenses on the test specimens. 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. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm.
ASTM D 控制冷凝法对涂层耐水性试验方法_百度文库
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. For manual drying of specimens, remove them from the apparatus.
The substrate composition and surface preparation, specimen preparation, asmt the number of specimens should be agreed upon prior to testing. 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.
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 removal of specimens for inspections during operation is permitted.
While corrosion products will drain into the water bath, they are not carried into the vapor that condenses on the test specimens.