The behaviour of aluminium brass in sea water and in 3·5% NaCl solution was investigated in the temperature range 25–60°C. In both instances, for short immersion times (2 h) the corrosion rate increased with increasing temperature, owing to acceleration of the anodic process. For longer immersion times (360 h) the corrosion rate decreased with increasing temperature because both the anodic and cathodic processes were inhibited. This is explained in terms of the precipitation, below 40°C, of greater amounts of aluminium compounds in the corrosion products which increase the compactness of the oxidation layer and decrease its ionic diffusivity.
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