Al-Ga-Mn-Ca-Cu合金电极碱性体系电化学性能  

Electrochemical Properties of Al-Ga-Mn-Ca-Cu Alloy Electrode Alkaline System

作　　者：李影 俞小花[1] 杨亚刚 史春阳 屈亚松 李荣兴[1] 谢刚[1,2,3] LI Ying;YU Xiaohua;YANG Yagang;SHI Chunyang;QU Yasong;LI Rongxing;XIE Gang(Faculty of Metallurgical and Energy Engineering,Kunming University of Science and Technology,Kunming 650093,China;Kunming Metallurgical Research Institute Co.,Ltd.,Kunming 650503,China;State Key Laboratory of Common Associated Non-ferrous Metal Resources Pressure Hydrometallurgy Technology,Kunming 650503,China)

机构地区：[1]昆明理工大学冶金与能源工程学院,昆明650093 [2]昆明冶金研究院有限公司,昆明650503 [3]共伴生有色金属资源加压湿法冶金技术国家重点实验室,昆明650503

出　　处：《有色金属工程》2020年第12期62-68,共7页Nonferrous Metals Engineering

基　　金：国家自然科学基金资助项目(51774160);云南省万人计划项目(YNWR-QNBJ-2018-327)。

摘　　要：通过熔铸、压延、退火等一系列工艺制作了新型Al-0.017Ga-0.885Mn-0.038Ca-0.048Cu(wt.%)阳极合金,并通过EIS、极化曲线分析研究了其在不同浓度NaOH溶液中的腐蚀行为和电化学性能。结果表明,随着NaOH浓度的增加,合金阳极的自腐蚀速率在逐渐增加,Al-0.017Ga-0.885Mn-0.038Ca-0.048Cu合金在4 mol/L NaOH溶液中的腐蚀速率增长速度明显降低,放电电压在电流密度为120 mA/cm2下仍能维持在1 V左右,阳极能量密度也最高,达6.056 kW·h/kg,更适合不同电流密度下的连续恒流放电。合金的恒流放电和EIS结果与腐蚀特性吻合较好。A new type of Al-0.017Ga-0.885Mn-0.038Ca-0.048Cu(wt.%)anode alloy was fabricated through a series of processes including casting,calendering,and annealing.EIS and polarization curve analysis were conducted to study its corrosion behavior and electrochemical performance in different concentrations of NaOH solution.The results show that with the increase of NaOH concentration,the self-corrosion rate of the alloy anode is gradually increasing,and the corrosion rate of Al-0.017Ga-0.885Mn-0.038Ca-0.048Cu alloy in 4 mol/L NaOH solution is significantly reduced.The discharge voltage can still be maintained at about 1 V at a current density of 120 mA/cm2,and the anode energy density is also the highest,reaching 6.056 kW·h/kg,which is more suitable for continuous constant current discharge at different current densities.Moreover,the constant current discharge and EIS results of the alloy are in good agreement with the corrosion characteristics.

关 键 词：合金阳极 碱液浓度 电化学性能 EIS 

分 类 号：TM911.14[电气工程—电力电子与电力传动] TG146.21[一般工业技术—材料科学与工程]