Evaluación de la corrosion de un duraluminio en mezclas de gasolina y bioetanol

nowadays, different countries use ethanol as a self-propulsion fuel. however, this biofuel is aggressive for metal parts in the fuel system of an automobile. in this study, we determined the corrosion rate of duralumin, a material used in the production of piston engines, in ethanol-gasoline blends at concentrations of 5 to 20%, through electrochemical impedance spectroscopy (eis), tafel polarization and gravimetry. it was shown that the corrosion process control was mixed with a tendency towards localized corrosion. it is generally observed that the corrosion rate of duralumin decreases during the exposure time.