Method for improving the corrosion protection of permanent magnets containing rare earth metals
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United States of America Patent
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May 13, 2003
Grant Date -
N/A
app pub date -
Feb 19, 2001
filing date -
Jul 17, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention relates to a method for producing a sintered material offering improved corrosion protection by activation and coating of the surface with a metal, followed by a heat treatment. Said method is characterized in that during activation and before coating with said metal the following steps are carried out: removal of particles adhering to the surface of the sintered material by treating said surface with a stripper; passivation of the surface; and drying of the sintered material. The invention also relates to a magnetic body with greater corrosion resistance.
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