Effect of molybdate on phosphating of Nd-Fe-B magnets for corrosion protection
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2003
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INTERNATIONAL LATIN-AMERICAN CONFERENCE ON POWDER TECHNOLOGY, 4th
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Resumo
The effect of phosphating on the corrosion resistance of a commercial Nd-Fe-B sintered magnet
has been investigated. Sintered magnet specimens were phosphated in solutions of 10 g/L
NaH(2)PO(4) (pH 3.8), either with or without molybdate [10(-3) M MoO(4)(2)], for improving their
corrosion resistance. The effect of phosphating time was also evaluated, with specimens
phosphated during 4 hours and 18 hours. To evaluate the corrosion performance of phosphated
and unphosphated specimens, a corrosion test based on monitoring hydrogen evolution on the
magnets surface was used. This technique revealed that molybdate addition into the phosphating
solution improves the corrosion resistance of the phosphated magnets for shorter periods of
immersion but has no beneficial effect for longer phosphating times.
Como referenciar
SALIBA SILVA, A.M.; OLIVEIRA, M.C.L.; COSTA, I. Effect of molybdate on phosphating of Nd-Fe-B magnets for corrosion protection. In: INTERNATIONAL LATIN-AMERICAN CONFERENCE ON POWDER TECHNOLOGY, 4th, Nov. 19-21, 2003, Guaruja, SP. Proceedings... Disponível em: http://repositorio.ipen.br/handle/123456789/16445. Acesso em: 20 Mar 2026.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.