Method for improving the protection against corrosion of a surface coated with aluminum
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United States of America Patent
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-
Aug 22, 2000
Grant Date -
N/A
app pub date -
Mar 6, 1997
filing date -
Mar 6, 1996
priority date (Note) -
Expired
status (Latency Note)
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Abstract
NdFeB magnets are very sensitive to corrosion and are provided, among other things, with a layer of aluminum in order to improve their resistance to corrosion. To improve the resistance of an aluminum-coated article, such as the NdFeB magnet, the magnet with the aluminum coating is subjected to a heat treatment at a temperature lower than the melting temperature of the aluminum, which heat treatment improves the resistance to corrosion when subjected to a humid atmosphere at an elevated temperature.
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