Transactions of Materials and Heat Treatment

Title：Study on design of extruded mold and extrusion process of wrought Mg-Mn magnesium sacrificial anode

Authors： Hou Juncai

Unit： Shannxi University of Technology

KeyWords： divergent orifices shape of seaming room extrusion speed electrochemical properties microstructure Mg-Mn sacrificial anode

ClassificationCode：

year,vol(issue):pagenumber：2015,40(10):106-111

Abstract：

Extrusion mould was designed for the high potential Mg-Mn sacrificial anode and the effects of process parameters on surface quality and electrochemical properties of the Mg-Mn anodes were also investigated. The main structural parameters were three tapered divergent orifices symmetrically distributed, the divergent ratio of the start and the butt of 16 and 27.5 respectively, steel core extrusion orifices set on the center of the divergent bridge, cylindrical seam room and the height of 30 mm, and the working band of 25 mm. The results show that the plain divergent mould is well designed for extruding the Mg-Mn sacrificial anode with inner steel core. When the extrusion ratio is ranging from 3.25 to 29.15, better surface quality can be obtained and the shape error can meet the standard for sacrificial anode. The phases formed by impurity elements can be more homogeneously distributed after extrusion deformation decreasing the extent of localized corrosion, resulting in that the current efficiency and open potential are dramatically increased compared to the as-cast anode.

Funds：

陕西省科技厅科技基金资助项目(2011JE009)；陕西省教育厅科技基金资助项目 (12JS034)

侯军才(1980-)，男，博士，讲师

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