Spray Test Results
Anodizing in Architecture
The below two pictures show how anodized aluminum responds to a salt spray test on anodized samples, administered for 1,000 hrs in accordance with ASTM B117. The three panels show increasing amounts of anodic coating. The thinnest shows the most pitting. The anodized coating thicknesses are 0.250, 0.50 and 0.8 mils. 0.50 is a AA Class II coating and 0.8 is a AA Class I coating. The Class I coating show little or no damage from the salt spray.