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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It does not specify specimen preparation, specific test conditions, or evaluation of results. It does not specify specimen preparation, speci? For manual drying of specimens, remove them from the apparatus.
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.
ASTM International – Standard References for ASTM D / DM – 18
A number in parentheses indicates the year of last reapproval. Summary of Practice 3. A superscript epsilon e indicates an editorial change since the last revision or reapproval. However, it is possible to test asrm blister resistance of house paints on wood specimens by mounting the uncoated wood surface facing the inside of the chamber.
Various types of tape can be used to seal the gaps that develop when the specimen deforms. Practices D cover application techniques for the production of uniform? While corrosion products will drain into the water bath, they are not carried into the vapor that condenses on the test specimens.
The test is therefore useful for evaluating coatings alone or complete coating systems. 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. Originally approved in Such adtm specimens can provide warning of changes in test severity in a given apparatus, and can indicate variations in test severity between different apparatuses.
Cleveland Condensing Type Cabinet
Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. A coating system is considered to pass if there is no evidence of water-related failure after a d44585 Work Item s – proposed revisions of this standard. Maximum thickness is 8 mm 3? If the specimens cannot completely? Mount coated metal panels with the coating to be tested facing the inside of the chamber.
Link to Active Zstm link will always route to the current Active version of the standard. Coated wood specimens may be mounted in the same way. The substrate composition and surface preparation, specimen preparation, and the number of asgm should be agreed upon prior to testing.
NOTE 4—A 3 mm ashm plate in place of a sample will work to monitor whether condensation is occurring. 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. Last previous edition approved in as 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.
Vents, approximately 3 to 5 mm 0. Locate the chamber away from air vents and direct drafts.
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. 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. If the test panels overshadow the upper shelf, do not put test panels on the upper shelf.
Failure in a condensation d458 may be caused by a number of factors including a de? Automatic drying requires the apparatus described in 5. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of 4d585 rights, are entirely their own responsibility. Check the samples periodically to make sure condensation is occurring. However, it is possible to test the blister resistance of house d4558 on wood specimens by mounting the uncoated wood surface facing the inside of the chamber.
Current edition approved June s4585, The removal of specimens for inspections during operation is permitted.
Your comments are invited either for revision of satm standard or for additional standards and should be addressed to ASTM International Headquarters. 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.
ASTM D 控制冷凝法对涂层耐水性试验方法_百度文库
Remove only as many specimens as can be rated within the speci? Approved June 1, A recovery period from 12 to 24 h is generally sufficient. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other.
Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. When removing a specimen for inspection, replace it with a blank so that the test conditions are not altered. This standard is subject to revision at any time by the responsible technical committee and must be reviewed every? Evaluate specimens no less than 5 min and no more than 10 min after removal from test, as the effects from water exposure can asym within a short time.
Practice G 53 has been replaced by Practice G 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.