| 添加剂K2MnO4对铝阳极电化学性能的影响 |
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| 引用本文： | 余祖孝,郝世雄,陈昌国. 添加剂K2MnO4对铝阳极电化学性能的影响[J]. 腐蚀与防护, 2005, 26(10): 422-424,428 |
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| 作者姓名： | 余祖孝 郝世雄 陈昌国 |
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| 作者单位： | 1. 四川理工学院材料与化学工程系,自贡,643033
2. 重庆大学化学化工学院,重庆,400044 |
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| 摘 要： | 用塔菲尔曲线、线性扫描伏安法、交流阻抗、恒电流放电等方法，研究了在4mol／LKOH溶液中，添加剂K2MnO4对四种纯铝阳极（99．999％、99．99％、99．82％、99．5％）电化学性能的影响，结果表明：K2MnO4能够提高铝阳极的电荷传递电阻（R）、抑制析氢腐蚀，同时提高其电活化性能（如降低极化、开路电位负移、放电性能提高），特别是对工业纯铝（99．5％）的活化性能改善很大；此外，K2MnO4的最佳浓度为0．8mmol／L。
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| 关 键 词： | 铝阳极 添加剂 电化学性能 |
| 文章编号： | 1005-748X（2005）10-0422-03 |
| 收稿时间： | 2005-03-24 |
| 修稿时间： | 2005-03-242005-05-07 |
EFFECT OF ADDITIVE K2MnO4 ON ELECTROCHEMICAL BEHAVIOUR OF ALUMINUM ANODE IN ALKALINE SOLUTION |
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| YU Zu-xiao,HAO Shi-xiong,CHEN Chang-guo. EFFECT OF ADDITIVE K2MnO4 ON ELECTROCHEMICAL BEHAVIOUR OF ALUMINUM ANODE IN ALKALINE SOLUTION[J]. Corrosion & Protection, 2005, 26(10): 422-424,428 |
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| Authors: | YU Zu-xiao HAO Shi-xiong CHEN Chang-guo |
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| Abstract: | Effect of additive K_2MnO_4 on electrochemical properties of four kinds of pure aluminum(99.999%,99.99%,99.82%,99.5%, rospectively)in 4mol/L KOH solution has been studied by using Tafel curves,linear scan volt-ampere,AC impedance and constant-current discharge curves.The R_t(charge transfer resistance) of aluminum increased and corrosion of aluminum was inhibited.The electrochemical properties such as passivation,E_(ocp),and discharge property of aluminum,especially industrial aluminum(99.5%) were also improved when K_2MnO_4 was added into 4mol/L KOH.The optimum concentration of additive was 0.8mmol/L K_2MnO_4. |
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| Keywords: | K2MnO4 |
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