工程科学学报，第40卷，第7期：800-807,2018年7月 Chinese Journal of Engineering,Vol.40,No.7:800-807,July 2018 DOI:10.13374/j.issn2095-9389.2018.07.005;http://journals.ustb.edu.cn 锌电积过程中锰元素对铝阴极的电化学行为影响 张小军12)，黄惠123)四，董劲23)，郭忠诚2) 1)昆明理工大学治金与能源工程学院，昆明6500932)云南省冶金电极材料工程技术研究中心，昆明650106 3)昆明理工恒达科技股份有限公司，昆明650106 ☒通信作者，E-mail:huihuanghan@163.com 摘要传统湿法炼锌工艺采用纯铝板作为阴极，但随着锌精矿品位的降低，电解液中杂质离子含量增大，造成阴极腐蚀消 耗增加.本文以铝锰合金为研究对象，研究锰作为添加元素，与铝形成良好铝锰合金阴极材料的电化学行为，进一步提高铝阴 极的耐蚀性和电催化活性。采用交流阻抗、阴极极化曲线、恒电流极化曲线、塔菲尔曲线等分析方法，探讨不同M元素含量 对铝锰合金在40℃恒温条件，Zm2*65gL和H2S04150g·L溶液中电化学行为的影响.研究结果表明：相比纯铝电极，添加 Mn元素的铝锰合金电极的耐蚀性普遍提高，腐蚀电流均减小：随着Mn含量的增加，腐蚀电流逐步降低，腐蚀电位与Mn含量 增加无明显变化规律：当Mn质量分数为1.5%时腐蚀电流达最低(1.11mA·cm2),腐蚀电位最小(-1.0954V):零电势下，表 观电流密度i。受Mn元素的添加影响显著，i,随Mn含量增加呈现出先增大后减小的趋势，在Mn质量分数1.5%时达到最大值 3.7462×10-6mA·cm2,远大于纯铝电极4.8027×10-3mA·cm2,整体变化幅度明显，电极的电催化活性得到提高：不同电 流密度下的析氢过电位和纯铝电极的整体接近，电化学过程均为电化学传质步骤控制.综合考虑电极材料的耐蚀性和电催化 活性，含M质量分数1.5%的铝锰合金可作为理想的电积锌阴极使用. 关键词铝锰合金；电积锌阴极；电化学特性；耐蚀；电催化活性：动力学过程 分类号TF813 Influence of manganese on the electrochemical behavior of an aluminum cathode used in zinc electrowinning ZHANG Xiao-jun'),HUANG Hui2),DONG Jin2),GUO Zhong-cheng'2) 1)Faculty of Metallurgical and Energy Engineering,Kunming University of Science and Technology,Kunming 650093,China 2)Yunnan Provincial Engineering Technology Research Center of Metallurgical Electrode Materials,Kunming 650106,China 3)Kunming Hendera Science and Technology Co.,Ld,Kunming 650106,China Corresponding author,E-mail:huihuanghan@163.com ABSTRACT Pure aluminum is commonly used as the cathode electrode in the traditional hydrometallurgy applications of zinc electro- winning.However,with the decrease of zinc concentrate grade and increase of the impurity ions in the electrolyte,the corrosion con- sumption of the cathode material increases gradually.To further improve the corrosion resistance and electrocatalytic activity of the alu- minum cathode,the electrochemical behavior of manganese as an additive for pure Al cathode material,such as Al-Mn alloy,was studied herein.Using the analysis methods of electrochemical impedance spectroscopy,cathodic polarization,galvanostatic polariza- tion,and Tafel curves,the effect of Mn content on the electrochemical behavior of Al-Mn alloy in 40C constant temperature condi- tions and a solution containing Zn'at 65 gL and H2SO,at 150gLwas investigated.The results show that the corrosion resist- ance of Al alloy containing Mn increases obviously compared to that of pure Al electrodes,and the increase of the Mn content could de- crease the corrosion current.Moreover,the corrosion potential and the Mn content do not exhibit obvious change trends.When the Mn 收稿日期：2017-07-17 基金项目：国家自然科学基金资助项目(51504111)：云南省自然科学基金资助项目(20113FA012,20113FB022)工程科学学报,第 40 卷,第 7 期:800鄄鄄807,2018 年 7 月 Chinese Journal of Engineering, Vol. 40, No. 7: 800鄄鄄807, July 2018 DOI: 10. 13374 / j. issn2095鄄鄄9389. 2018. 07. 005; http: / / journals. ustb. edu. cn 锌电积过程中锰元素对铝阴极的电化学行为影响 张小军1,2) , 黄 惠1,2,3) 苣 , 董 劲2,3) , 郭忠诚1,2,3) 1)昆明理工大学冶金与能源工程学院, 昆明 650093 2)云南省冶金电极材料工程技术研究中心, 昆明 650106 3)昆明理工恒达科技股份有限公司, 昆明 650106 苣通信作者,E鄄mail: huihuanghan@ 163. com 摘 要 传统湿法炼锌工艺采用纯铝板作为阴极,但随着锌精矿品位的降低,电解液中杂质离子含量增大,造成阴极腐蚀消 耗增加. 本文以铝锰合金为研究对象,研究锰作为添加元素,与铝形成良好铝锰合金阴极材料的电化学行为,进一步提高铝阴 极的耐蚀性和电催化活性. 采用交流阻抗、阴极极化曲线、恒电流极化曲线、塔菲尔曲线等分析方法,探讨不同 Mn 元素含量 对铝锰合金在40 益恒温条件,Zn 2 + 65 g·L - 1和 H2 SO4 150 g·L - 1溶液中电化学行为的影响. 研究结果表明:相比纯铝电极,添加 Mn 元素的铝锰合金电极的耐蚀性普遍提高,腐蚀电流均减小;随着 Mn 含量的增加,腐蚀电流逐步降低,腐蚀电位与 Mn 含量 增加无明显变化规律;当 Mn 质量分数为1郾 5% 时腐蚀电流达最低(1郾 11 mA·cm - 2 ),腐蚀电位最小( - 1郾 0954V);零电势下,表 观电流密度 i 0受 Mn 元素的添加影响显著,i 0随 Mn 含量增加呈现出先增大后减小的趋势,在 Mn 质量分数 1郾 5% 时达到最大值 3郾 7462 伊 10 - 16 mA·cm - 2 ,远大于纯铝电极 4郾 8027 伊 10 - 33 mA·cm - 2 ,整体变化幅度明显,电极的电催化活性得到提高;不同电 流密度下的析氢过电位和纯铝电极的整体接近,电化学过程均为电化学传质步骤控制. 综合考虑电极材料的耐蚀性和电催化 活性,含 Mn 质量分数 1郾 5% 的铝锰合金可作为理想的电积锌阴极使用. 关键词 铝锰合金; 电积锌阴极; 电化学特性; 耐蚀; 电催化活性; 动力学过程 分类号 TF813 收稿日期: 2017鄄鄄07鄄鄄17 基金项目: 国家自然科学基金资助项目(51504111);云南省自然科学基金资助项目(20113FA012,20113FB022) Influence of manganese on the electrochemical behavior of an aluminum cathode used in zinc electrowinning ZHANG Xiao鄄jun 1,2) , HUANG Hui 1,2,3) 苣 , DONG Jin 2,3) , GUO Zhong鄄cheng 1,2,3) 1) Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China 2) Yunnan Provincial Engineering Technology Research Center of Metallurgical Electrode Materials, Kunming 650106, China 3) Kunming Hendera Science and Technology Co. , Ltd, Kunming 650106, China 苣Corresponding author, E鄄mail: huihuanghan@ 163. com ABSTRACT Pure aluminum is commonly used as the cathode electrode in the traditional hydrometallurgy applications of zinc electro鄄 winning. However, with the decrease of zinc concentrate grade and increase of the impurity ions in the electrolyte, the corrosion con鄄 sumption of the cathode material increases gradually. To further improve the corrosion resistance and electrocatalytic activity of the alu鄄 minum cathode, the electrochemical behavior of manganese as an additive for pure Al cathode material, such as Al鄄鄄 Mn alloy, was studied herein. Using the analysis methods of electrochemical impedance spectroscopy, cathodic polarization, galvanostatic polariza鄄 tion, and Tafel curves, the effect of Mn content on the electrochemical behavior of Al鄄鄄Mn alloy in 40 益 constant temperature condi鄄 tions and a solution containing Zn 2 + at 65 g·L - 1 and H2 SO4 at 150 g·L - 1 was investigated. The results show that the corrosion resist鄄 ance of Al alloy containing Mn increases obviously compared to that of pure Al electrodes, and the increase of the Mn content could de鄄 crease the corrosion current. Moreover, the corrosion potential and the Mn content do not exhibit obvious change trends. When the Mn