The practice defined in the ASTM D2247 standard developed by the American Society for Testing and Materials (ASTM) covers the basic principles and operating procedures for testing the water resistance of coatings by exposing the coated specimens in an atmosphere maintained at 100 percent relative humidity to form condensation on all surfaces of the test specimens.
This practice, whose full name is “ASTM D2247-15 Standard practice for testing the water resistance of coatings at 100 percent relative humidity”, uses the technique of creating a slight temperature difference within the exposure area to create condensation on the coated samples. As the warmer saturated air passes through the colder samples, water accumulates on the samples in the form of condensation.
This practice places the entire sample in the exposure area and allows condensation to form on all surfaces. This way the application becomes suitable for flat panels as well as large or three-dimensional objects. This application differs from other methods in which condensation occurs only on the faceplate surface while outside the exposure area of the rear surface. Other tests may also leave water droplets on the surface, but where the source is not from condensation (eg water spray).
Alternative applications are defined in ASTM D870, ASTM D1735 and ASTM D4585 standards to test the water resistance of coatings.
The application defined in the ASTM D2247 standard is limited to the methods of obtaining, measuring, and controlling the conditions and procedures for tests performed at 100 percent relative humidity. It does not include sample preparation or evaluation of results.
Briefly, the water resistance of the coatings is tested by exposing the coated samples to high relative humidity at a high constant temperature. The test specimens are placed in a closed chamber at 38 degrees Celsius and 100 percent relative humidity, where a climate of a heated, saturated mixture of air and water vapor is created. This climate is maintained under steady steady state conditions. Test duration is variable.
Among the numerous test, measurement, analysis and evaluation studies it provides for businesses in various sectors, our organization provides standard testing services to test the water resistance of coatings at 2247 percent relative humidity, within the scope of ASTM D15-100 standard, with its trained and expert staff and advanced technological equipment. gives.
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