Corrosion and hydrogen absorption in melt spun NdFeB-TiC bonded magnets

Author

Arenas, M. ; Warren, G.W. ; Li, C.P. ; Dennis, K.W. ; McCallum, R.W.

Author_Institution

Dept. of Metall. & Mater. Eng., Alabama Univ., Tuscaloosa, AL, USA

Volume

33

Issue

5

fYear

1997

fDate

9/1/1997 12:00:00 AM

Firstpage

3901

Lastpage

3903

Abstract

The corrosion behavior of bonded NdFeB permanent magnet materials produced by melt spinning with and without TiC additions has been investigated. Typical anodic polarization experiments in 0.9 M Na₂SO₄ showed that the addition of 6 a/o TiC resulted in lower corrosion currents and reduced iron dissolution at fixed potential. The role of hydrogen was also investigated by means of galvanostatic charging and discharging experiments (hydrogen absorption and desorption) in 6M KOH which showed that the addition of TiC resulted in a reduction of absorbed hydrogen

Keywords

boron alloys; corrosion; desorption; electrochemistry; ferromagnetic materials; hydrogen; iron alloys; melt spinning; neodymium alloys; permanent magnets; sorption; titanium compounds; H absorption; KOH; Na₂SO₄; NdFeB-TiC; TiC additions; anodic polarization experiments; corrosion behavior; desorption; discharging experiments; fixed potential; galvanostatic charging; melt spinning; melt spun NdFeB-TiC bonded magnets; permanent magnet materials; reduced iron dissolution; Absorption; Bonding; Corrosion; Degradation; Hydrogen; Iron; Laboratories; Magnetic materials; Permanent magnets; Polarization;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.619609

Filename

619609