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Corrosion of metals for automotive applications in ethanol blended biofuels

Abstract With the objective of reduction carbon dioxide emissions, gasoline fuels are increasingly being blended with ethanol of biogenous origin. These blends cause changes in the corrosivity of the fuels. As a result, different forms of corrosion, e.g. general, wet and dry corrosion, of metallic materials must be considered to ensure the corrosion resistance of constructions in contact with fuels. The corrosion behaviour of a stainless steel, a brass alloy and wrought and cast aluminium alloys has been investigated in ethanol containing gasoline fuel blends of practical interest, studying the possible forms of electrochemical and chemical corrosion under long term exposure in ambient conditions and under high temperatures and pressures.