ScholarLens Back to search
2006•Journal of Beijing University of TechnologyRequires access

Corrosion Behavior of Spark Plasma Sintering NdFeB Magnets

Liu Weiqiang

Open publisher page 0 citations

Abstract

Polarization curve and electrochemical impedance spectroscopy(EIS)tests were applied to investi- gate the corrosion behaviors and corrosion kinetics of spark plasma sintering NdFeB magnets in different elec- trolytes.The results show that in alkaline solution the electrochemical reaction of the magnets is controlled by the step of surface charge transfer i.e.activation polarization process,the magnet with a compact passivation layer on their surface exhibits evident passive behavior in this circumstance;in weak acid solution,the electro- chemical reaction of the magnets is controlled by the step of active substances adsorption process,the magnet is susceptible to corrosion in this environment since there are many active reaction channels in the anodic(Nd- rich phase)areas.Compared with conventional sintered NdFeB magnet,SPS NdFeB magnet possesses excel- lent corrosion resistance.

About this research paper

What this paper is about

Polarization curve and electrochemical impedance spectroscopy(EIS)tests were applied to investi- gate the corrosion behaviors and corrosion kinetics of spark plasma sintering NdFeB magnets in different elec- trolytes.The results show that in alkaline solution the electrochemical reaction of the magnets is controlled by the step of surface charge transfer i.e.activation polarization process,the magnet with a compact passivation layer on their surface exhibits evident passive behavior in this circumstance;in weak acid solution,the electro- chemical reaction of the magnets is controlled by the step of active substances adsorption process,the magnet is susceptible to corrosion in this environment since there are many active reaction channels in the anodic(Nd- rich phase)areas.Compared with conventional sintered NdFeB magnet,SPS NdFeB magnet possesses excel- lent corrosion resistance.

Why it matters

A significance statement is not available in the OpenAlex record.

Key contribution

A contribution statement is not available in the OpenAlex record.

Method / approach

Method details are not available in the OpenAlex metadata.

Main findings

Findings are not separately available in the OpenAlex metadata.

Limitations

Limitations are not available in the OpenAlex metadata.

Applications

Application details are not available in the OpenAlex metadata.

Available abstract

Polarization curve and electrochemical impedance spectroscopy(EIS)tests were applied to investi- gate the corrosion behaviors and corrosion kinetics of spark plasma sintering NdFeB magnets in different elec- trolytes.The results show that in alkaline solution the electrochemical reaction of the magnets is controlled by the step of surface charge transfer i.e.activation polarization process,the magnet with a compact passivation layer on their surface exhibits evident passive behavior in this circumstance;in weak acid solution,the electro- chemical reaction of the magnets is controlled by the step of active substances adsorption process,the magnet is susceptible to corrosion in this environment since there are many active reaction channels in the anodic(Nd- rich phase)areas.Compared with conventional sintered NdFeB magnet,SPS NdFeB magnet possesses excel- lent corrosion resistance.

Key concepts: Neodymium magnet, Materials science, Corrosion, Magnet, Spark plasma sintering, Passivation, Dielectric spectroscopy, Polarization (electrochemistry)

Related papers

Related paper 1Related paper 2Related paper 3
Back to paper searchBrowse research topicsOriginal source
Corrosion Behavior of Spark Plasma Sintering NdFeB Magnets — Research Paper | ScholarLens