The effect of gallium addition on the corrosion resistance of a Pr-Fe-Co-B-Nb permanent magnet alloy
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2008
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CONGRESSO BRASILEIRO DE ENGENHARIA E CIENCIA DOS MATERIAIS, 18.
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The effect of gallium addition (0.5 wt. %) on the corrosion resistance of a Pr-FeCo-B-Nb permanent magnet alloy has been investigated. The electrochemical
behavior was assessed using potentiodynamic polarization and electrochemical
impedance spectroscopy (EIS). The electrochemical tests were carried out during 30
days using a naturally aerated 0.02M Na2HPO4 solution at room temperature as
electrolyte. The specimens were annealed for 20h at 1100ºC prior to immersion in
the electrolyte. The results pointed towards a beneficial effect of Ga addition on the
resistance of the surface film to breakdown. The surface film was formed upon
immersion in the phosphate solution used as test medium. In this solution, the
corrosion resistance of both alloys tested, either with or without Ga, increased with
time of immersion due to the continuous growth of the phosphate film on their
surfaces.The effect of gallium addition (0.5 wt. %) on the corrosion resistance of a Pr-FeCo-B-Nb permanent magnet alloy has been investigated. The electrochemical
behavior was assessed using potentiodynamic polarization and electrochemical
impedance spectroscopy (EIS). The electrochemical tests were carried out during 30
days using a naturally aerated 0.02M Na2HPO4 solution at room temperature as
electrolyte. The specimens were annealed for 20h at 1100ºC prior to immersion in
the electrolyte. The results pointed towards a beneficial effect of Ga addition on the
resistance of the surface film to breakdown. The surface film was formed upon
immersion in the phosphate solution used as test medium. In this solution, the
corrosion resistance of both alloys tested, either with or without Ga, increased with
time of immersion due to the continuous growth of the phosphate film on their surfaces.
Como referenciar
OLIVEIRA, M.C.L.; FARIA, R.N.; COSTA, I. The effect of gallium addition on the corrosion resistance of a Pr-Fe-Co-B-Nb permanent magnet alloy. In: CONGRESSO BRASILEIRO DE ENGENHARIA E CIENCIA DOS MATERIAIS, 18., 24-28 de novembro, 2008, Porto de Galinhas, PE. Anais... p. 7229-7237. Disponível em: http://repositorio.ipen.br/handle/123456789/15870. Acesso em: 30 Dec 2025.
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.