Permanent magnet having high corrosion resistance, a process for

Details Permanent magnet having high corrosion resistance, a process for Permanent magnet having high corrosion resistance, a process for

1992-07-30

1994-01-18

Walsh, Donald P.

Powder metallurgy processes

Powder metallurgy processes with heating or sintering

Making porous product

419 10, 419 35, 419 36, 419 65, 29607, 29608, 29609, 148105, 427127, 427155, 427447, B22F 306, B05D 500

Patent

active

052797856

ABSTRACT:
A sintered or bonded permanent magnet formed from a material consisting mainly of iron, particularly a Nd-Fe-B alloy, and having a high corrosion resistance has a surface coated with a resin obtained by the polycondensation of tannic acid, phenols and aldehydes. A bonded magnet is also made from a powder of any such material composed of particles coated with any such resin.

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