Examination on Electrolytic Condition for Isolation of Nitride from Iron by Potentiostatic Measurement (Study on Nitrides in Iron and Steels—1st Report)

Abstract

The polarizing characteristics of synthesized nitrides were investigated by means of a potentiostat in order to examine the electrolytic condition for isolating nitrides from iron and steels. Synthesized nitrides employed in the present investigation were Fe₃N,Mn₃N₂,MO₂N,MoN,Cr₂N,CrN,VN,Si₃N₄,AlN,TiN,ZrN and NbN. From the measurements of polarization curve and natural electrode potential of iron and these nitrides, useful informations were obtained on the electrolyte and the anode potential for isolating electrolytically the nitrides included in iron and steels. That is, if a suitable anode potential is applied, both acid and neutral solutions can be used as an electrolyte for the isolation of the nitrides except those of Al,Fe and Mn. While, for the iron nitride, only neutral electrolyte is adequate. As to the nitrides of Al and Mn, however, there seems to be no favorable electrolyte for the isolation within the extent of the experiment.