Standard Practice for Testing Water Resistance of Coatings Using Water Fog Apparatus

Importancia y uso:

4.1 Water can cause the degradation of coatings, so knowledge of how a coating resists water is helpful in predicting its service life. Failure in water fog tests may be caused by a number of factors, including a deficiency in the coating itself, contamination of the substrate, or inadequate surface preparation. The test is therefore useful for evaluating coatings alone or complete coating systems.

4.2 Water fog tests are used for research and development of coatings and substrate treatments, specification acceptance, and quality control in manufacturing. These tests usually result in a pass or fail determination, but the degree of failure may also be measured. A coating system is considered to pass if there is no evidence of water-related failure after a specified period of time.

4.3 Results obtained from the use of water fog tests in accordance with this practice should not be represented as being equivalent to a period of exposure to water in the natural environment, until the degree of quantitative correlation has been established for the coating or coating system.

4.4 The test apparatus is similar to that used in Practice B117, and the conversion of the apparatus from salt spray to water fog testing is feasible. Care should be taken to remove all traces of the salt from the cabinet and reservoir when converting from salt spray to water fog testing.

Subcomité:

D01.27

Referida por:

D1654-24, D0333-01R21, D3451-24, C0635_C0635M-22, D7893-13R18, A0755_A0755M-18R24, D0870-15R20E01, D4585_D4585M-18, D3794-22, D6577-24, D2247-15R20E01, D7270-07R21, A0755_A0755M-18R24, D3322-23

Volúmen:

06.01

Número ICS:

25.220.20 (Surface treatment)

Palabras clave:

adhesion; blistering; resistance-water; rust; water fog;