Influence of temperature on initial corrosion behavior of aluminum alloy 2A12 in simulated tank water environment

Aluminum alloy corrosion in airplane tank water is a serious problem. The influence of temperature on the initial corrosion behavior of aluminum alloy 2A12 in a simulated tank water environment is studied by observing the corrosion morphology, maximum pitting corrosion depth, maximum pitting corrosion area, surface corrosion damage ratio, EIS, etc. The results indicate that pitting corrosion depth, pitting corrosion area and surface corrosion damage ratio increase with increasing temperature. In particular, at temperatures 65°C and 75°C, corrosion speed increases dramatically. In the simulated tank water of 25, 35, 45 and 55°C, the variation in maximum pitting corrosion depth and area with time all fit well withthe power function. At temperatures 65°C and 75°C, they both fit well with the least square polynomial fitting. In addition, EIS indicates that corrosion rate in simulated tank water of three typical temperatures (25, 55, 75°C) increases with temperature increase.