More D Scope 1. 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. This practice is derived from research of the Cleveland Society for Coatings Technology. It does not specify specimen preparation, specific test conditions, or evaluation of results. Note 1—Alternative practices for testing water resistance of coatings include Practices D, D, and D
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More D This practice is intended to induce property changes associated with end-use conditions, including the effects of sunlight, moisture, and heat.
The exposure used in this practice is not intended to simulate the deterioration caused by localized weather phenomena such as atmospheric pollution, biological attack, and saltwater exposure. Therefore, no reference to the use of this practice shall be made unless accompanied by a report prepared according to Section 10 that describes the specific operating conditions used. Refer to Practice G for detailed information on the caveats applicable to use of results obtained according to this practice.
The type and rate of degradation and the performance rankings produced in exposures to fluorescent UV lamps can be much different from those produced by exposures to other types of laboratory light sources.
It is recommended that at least three replicates of each material be exposed to allow for statistical evaluation of results. Significant factors include regulation of line voltage, temperature of the room in which the device operates, temperature control, and condition and age of the lamps. Scope 1. This practice also covers the preparation of test specimens, and the evaluation of test results.
Table 1 describes commonly used test conditions. Practice G53 has been withdrawn and replaced by Practice G, which describes performance criteria for all exposure devices that use laboratory light sources, and by Practice G, which gives requirements for exposing nonmetallic materials in fluorescent UV devices.
The values given in parentheses are for information only. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
Goltikora Link to Active This link will always route to the current Active version of the standard. 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. Remove only as many specimens as can be rated within the speci? 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.
Gojin The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. The test is therefore useful for evaluating coatings alone or complete coating systems. Failure in a condensation test may be caused by a number ast, factors including a deficiency in the coating itself, contamination of the substrate, or inadequate surface preparation. A coating system is considered to pass if there aztm no evidence of water-related failure after a specified period of time. The values given in parentheses are for information only. The post-recovery rating allows evaluation of the permanent effects of the exposure as distinct from atsm transient effects, and is especially important for evaluation of color and gloss.
This standard describes an accelerated aging test which allows to assess the water resistance of coatings through the use of controlled condensation. More specifically, this practice states the principles and the operating conditions that required to achieve consistent results from lab to lab. Moreover, ASTM D does not provide any indications regarding the preparation of the specimen, the specific test conditions, nor does it offer any guidance or requirements for the evaluation of the results. Click and Receive a quote within the next 4 hours. Testing Water Resistance of coating using controlled Condensation—use and factors to consider: The purpose of ASTM D is to assess the capacity of a coating to resist deterioration that is caused by water through the use of a condensation test.
More D This practice is intended to induce property changes associated with end-use conditions, including the effects of sunlight, moisture, and heat. The exposure used in this practice is not intended to simulate the deterioration caused by localized weather phenomena such as atmospheric pollution, biological attack, and saltwater exposure. Therefore, no reference to the use of this practice shall be made unless accompanied by a report prepared according to Section 10 that describes the specific operating conditions used.