工程科学学报2016，Vol.38Issue(6)：767-772,6.DOI:10.13374/j.issn2095-9389.2016.06.004
超硬铝合金作为阴极在锌电积过程中的电化学行为
Electrochemical behavior of the super high strength aluminum alloy as a cathode in zinc electrodeposition
摘要
Abstract
The characteristics of commercial pure aluminum and a super high strength aluminum alloy as cathodes in zinc electro-deposition were studied in this paper. In a ZnSO4-H2 SO4 system, the electrochemical behavior of the two cathodes was investigated by electrochemical test, the initial nucleation was observed by scanning electron microscopy, and the crystalline orientations of zinc sheets were observed by X-ray energy dispersive spectrometry. The results show that under a current density of 500 A·m-2 , the deposition potential and exchange current density of the commercial pure aluminum and super high strength aluminum alloy are -1. 541 V, 7. 74í10 -11 A·cm-2 and -1. 496 V, 6. 07í10 -3 A·cm-2 , respectively. The addition of alloying elements can increase the initial nucle-ation sites and promote the rate of nucleation, but the increase of nucleation rate can inhibit cathode corrosion by halogen elements. There is no change in the crystalline orientations of zinc sheets after deposition for 3 h. The super high strength aluminum alloy is prone to burn the plate and blister, with a lower current efficiency of only 84. 54%. The current efficiency of the pure aluminum is 88. 04%, the morphology of deposited zinc is flat and smooth, but the cathode plate is easy to be corroded by halogen elements.关键词
锌冶金/电沉积/铝合金/阴极/电化学行为/腐蚀Key words
zinc metallurgy/electrodeposition/aluminum alloys/cathodes/electrochemical behavior/corrosion分类
矿业与冶金引用本文复制引用
栗韬,黄惠,郭忠诚..超硬铝合金作为阴极在锌电积过程中的电化学行为[J].工程科学学报,2016,38(6):767-772,6.基金项目
国家自然科学基金资助项目(51504111) （51504111）
云南省自然科学基金资助项目(20113FA012,20113FB022) （20113FA012,20113FB022）
