Condensation can often becomes a cause for corrosion and other coating defects as it permeates into the coating layer and comes into contact with the bare substrate. Humidity chamber testing evaluates the water resistance properties of a coating by placing it in an enclosed chamber containing a heated, saturated mixture of air and water vapor, maintained at 100% relative humidity. This 100% relative humidity environment makes it very conducive for the formation of condensation to develop on the coating when a surface and atmospheric temperature difference is detected. At regular intervals and after a specified period of time, the coated panels are examined for any detrimental effects caused by the condensation, such as color change, blistering, loss of adhesion, softening, or brittling.
