Abstract

The corrosion of aluminum was studied by weight loss measurements in 0.0001N to 1N neutral electrolyte solutions at constant temperature. Oxygen concentration in these solutions was varied over a wide range either by bubbling the gas through the solution or by increasing the partial pressure above the solutions.Weight loss increased with time and increasing oxygen concentration, but decreased with increasing electrolyte concentration. The electrode potential increased in anodic direction with time and increasing electrolyte concentration. Chloride solutions were more aggressive than any other solutions used. Hydrogen peroxide, which might have been a corrosion accelerator in experiments under high oxygen pressure, was found absent in all cases.Results are discussed in the light of the electrochemical theory of corrosion. The relation of oxygen solubility in potassium chloride solutions to corrosion is also discussed.

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