Rare earth magnts: the need for protection against corrosion

Abstract:

Conventional and the latest corrosion protection methods (electroless plating, electroless deposition, chemical vapor deposition, physical vapor deposition and paint application) are also used for carbon steel alloys and for TR-Fe-B based alloys. This protection is necessary since these alloys have a much more complex microstructure than those of carbon steels and have in their composition rare earth metals which are intrinsically susceptible to corrosion. The coatings used are generally made of nobler metals than the alloys and it is a very important characteristic because they must be kept intact during the individual handling of the magnets and during their assembly or positioning on the various devices in which they are currently employed. The rupture of the coating will reduce the life of the devices.


Reference:

SANTOS, Célia Aparecida Lino dos; PANOSSIAN, Zehbour. Ímãs de terras raras: a necessidade de proteção contra a corrosão. In: CONGRESSO ANUAL DA ABM, 72., 2017, São Paulo. Anais… Rio de Janeiro: ABM WEEK, 2017. p. 2190-2201.

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