The invention provides an aluminum
alloy anode material for a
seawater battery and a preparation method. The electrochemical performance of an aluminum
alloy in a
seawater medium is improved through amicroalloying method. According to the preparation method, firstly, activating elements Ga, Bi, Cd and Pb are added to promote an oxidation film layer on the surface of the aluminum
alloy to be dissolved and strip off, the potential of an
anode is remarkably and negatively moved, and the activation performance of the
anode is improved; secondly, elements Sn, Zn and Mn with the high
hydrogen evolution potential are added, the
hydrogen evolution
overpotential of the aluminum alloy is increased to some extent, the probability of
hydrogen evolution
corrosion of the anode is reduced, and accordingly, the current efficiency of the anode is improved; and finally, by controlling the contents of
impurity elements Fe and Cu in an aluminum
ingot, self-
corrosion of the aluminum alloy anode is reduced, and the
dissolution morphology of the aluminum alloy anode is improved. In the preparation process of the anode, by controlling the feeding sequence and technological parameters of all the components, the anode material has the negative working potential,
high activity and low self-
corrosion rate in the
seawater medium, and the driving potential and current efficiency of the aluminum-seawater battery can be effectively improved.