Effects of sintering temperature on microstructure and performance of Ti-based Ti-Mn alloy anodic material

Abstract

A novel Ti-based Ti-Mn composite anode used for electrolytic manganese dioxide (EMD) fabrication was developed by a two-step heating manganizing technique. The effects of sintering temperature on the manganized microstructure and the performance of the composite anode were studied by scanning electron microscopy (SEM), mechanical properties tests at room temperature and electrochemical methods. The results show that the thickness of the diffusion layer increases with the increase of sintering temperature up to 1 100 °C; whereas, the surface Mn content increases and reaches the maximum at 1 000 °C and then decreases thereafter. Lower surface Mn content is beneficial for the enhanced corrosion resistance and lowered open cell voltage in electrolytic process. The new anode prepared under the optimized conditions has been applied in industry and exhibits superior economic benefits to conventional Ti anodic materials.

Keywords

Ti-based Ti-Mn composite anode / electrolytic manganese dioxide (EMD) / microstructure / electrochemical property / corrosion resistance property / mechanical properties

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