The effect of absorbed hydrogen on the corrosion behavior of sintered NdFeB magnet / Yang, H. in Materials and corrosion, Vol. 63 N° 4 (Avril 2012)  

Public ISBD [article]  inMaterials and corrosion > Vol. 63 N° 4 (Avril 2012) . - pp. 292–296 Titre : The effect of absorbed hydrogen on the corrosion behavior of sintered NdFeB magnet Type de document : texte imprimé Auteurs : Yang, H., Auteur ; S. Mao, Auteur ; Z. Song, Auteur Année de publication : 2012 Article en page(s) : pp. 292–296 Note générale : Génie mécanique Langues : Anglais (eng) Mots-clés : Cathodic hydrogen charging  corrosion resistance  exfoliation corrosion  absorption  NdFeB magnet Résumé : The absorption of hydrogen by NdFeB magnet has been investigated by using the electrochemical charging technique at constant cathodic current density Ic ranging from 0 to 4 mA/cm2. Open circuit potential measurements (OCP) and polarization curves were carried out to study the corrosion behavior of the charged NdFeB magnet in 0.01 mol/L NaCl solution. The results showed that hydrogen had a strong influence on the corrosion of NdFeB magnet. The open circuit potential became gradually negative due to the hydrogen incorporation into the NdFeB magnet. The corrosion resistance was reduced gradually with the increasing cathodic current density Ic. The surface structure and the morphology of the charged NdFeB magnet were examined by XRD and SEM. The results revealed that the effect of the absorbed hydrogen focused mostly on accelerating the exfoliation corrosion of Nd2Fe14B matrix grain. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.201005956/abstract [article] The effect of absorbed hydrogen on the corrosion behavior of sintered NdFeB magnet [texte imprimé] / Yang, H., Auteur ; S. Mao, Auteur ; Z. Song, Auteur . - 2012 . - pp. 292–296. Génie mécanique Langues : Anglais (eng) in Materials and corrosion > Vol. 63 N° 4 (Avril 2012) . - pp. 292–296 Mots-clés : Cathodic hydrogen charging  corrosion resistance  exfoliation corrosion  absorption  NdFeB magnet Résumé : The absorption of hydrogen by NdFeB magnet has been investigated by using the electrochemical charging technique at constant cathodic current density Ic ranging from 0 to 4 mA/cm2. Open circuit potential measurements (OCP) and polarization curves were carried out to study the corrosion behavior of the charged NdFeB magnet in 0.01 mol/L NaCl solution. The results showed that hydrogen had a strong influence on the corrosion of NdFeB magnet. The open circuit potential became gradually negative due to the hydrogen incorporation into the NdFeB magnet. The corrosion resistance was reduced gradually with the increasing cathodic current density Ic. The surface structure and the morphology of the charged NdFeB magnet were examined by XRD and SEM. The results revealed that the effect of the absorbed hydrogen focused mostly on accelerating the exfoliation corrosion of Nd2Fe14B matrix grain. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.201005956/abstract

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