Differences in Absorption and Desorption Rates

The rate at which a coating absorbs water is not necessarily the same as the rate at which it dries out. Some coatings have nearly the same absorption and desorption rates, whereas others show slower drying than wetting, or vice versa. 

Temperature is a crucial variable in any accelerated corrosion testing. Higher temperature means more energy available, and thus faster rates, for the chemical processes that cause both corrosion and degradation of cured films. Increasing the temperature — within limits — does not alter the corrosion reaction at the metal surface it merely speeds it up. A potential problem, however, is what the higher 

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In accelerated testing, the difference in absorption and desorption rates of water for various coatings is also important (see Chapter 7). 

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