Probability Model of Surface Corrosion Damage Ratio of Aluminum Alloy

Experiments were conducted on aluminum alloy specimens to observe the evolution of surface corrosion damage under controlled electrochemical conditions. After corrosion exposure, the optical microscope was used to measure the corrosion pits density and size on the surface of specimens. Based on the measured data sets of surface corrosion damage ratio, the probabilistic model of corrosion damage evolution was investigated. The Logistic distribution was acceptable for the data sets of the surface corrosion damage ratio. Using the probability model of corrosion damage evolution, the corrosion damage in varied environment can be forecasted.