Abstract
The corrosion behaviour of extruded and unidirectionally solidified Al Al 4Ca eutectic alloy in a neutral sodium chloride solution has been compared with the behaviour of commercially pure Al and Al Cu alloy. From both anodic and cathodic cyclic linear potentiodynamic measurements and from S.E.M. observations it was possible to point out that the corrosion behaviour of unidirectionally solidified alloy is substantially equal to that of the extruded alloy, slightly different from that of commercially pure Al and better than Al Cu alloy. Therefore, the use of this new lamellae-reinforced Al Al 4Ca composite is promising, even though from the corrosion point of view further studies involving different techniques and conditions (solutions, temperature, surface state, stress, etc.) should be undertaken.
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