Ce-containing magnesium alloy sacrificial anode and preparation method and application thereof

The invention relates to the technical field of alloy materials, in particular to a Ce-containing magnesium alloy sacrificial anode and a preparation method and application thereof. The magnesium alloy sacrificial anode comprises a magnesium rod body made of a rare earth magnesium alloy material, the rare earth magnesium alloy material contains Mg, and the magnesium alloy sacrificial anode further comprises, by mass, 0.8%-2.4% of rare earth elements; the rare earth element is Ce; and in the magnesium alloy sacrificial anode, the rare earth magnesium alloy material further comprises the following components in percentage by mass: 5.8-6.5% of Al and 2.6-3.1% of Zn. According to the magnesium alloy sacrificial anode, the content of a beta phase in a magnesium alloy sacrificial anode structure is reduced by adding a proper amount of Ce-containing cerium rare earth elements, the self-corrosion degree of the magnesium alloy sacrificial anode is reduced, distribution of the beta phase in the structure is improved, the current efficiency of the magnesium alloy sacrificial anode is high, and the service life of the magnesium alloy sacrificial anode is prolonged. The current efficiency of the magnesium alloy sacrificial anode exceeds 58%, and the problem that the corrosion rate of an existing magnesium alloy sacrificial anode serving as a sacrificial anode material is too high can be solved.