Electrodepositing apparatus and preparation of rare earth permanent magnet

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An electrodepositing apparatus is provided comprising an inner tank (1) filled with an electrodepositing solution, an outer tank (3), a feedback means (4), a rectifying member (5) disposed in the inner tank (1), a means (8) for holding an article (p), a counter electrode (6), and a power supply (9). The electrodepositing solution is circulated in such a way that it overflows the inner tank and is fed back from the outer tank to the inner tank by the feedback means, the flow of the solution is rectified by the rectifying member to keep flat the solution surface in the inner tank, a selected portion of the article is immersed in the solution, and the coating agent is electrodeposited on the selected portion of the article.