阴离子对铝电极电化学行为的影响

中国腐蚀与防护学报

1998, Vol. 18

Issue (3): 209-213

研究报告

本期目录 | 过刊浏览

阴离子对铝电极电化学行为的影响

许刚;曹楚南;林海潮;张鉴清

中国科学院金属腐蚀与防护研究所;金属腐蚀与防护国家重点实验室沈阳110015;中国科学院金属腐蚀与防护研究所;金属腐蚀与防护国家重点实验室沈阳110015;中国科学院金属腐蚀与防护研究所;金属腐蚀与防护国家重点实验室沈阳110015;浙江大学化学系;杭州310013

INFLUENCE OF ANION ON ELECTROCHEMICAL BEHAVIOR OF ALUMINUM

XU Gang CAO Chu-nan LIN Hai-chao(State Key Laboratory for Corrosion & Protection; Institute of Corrosion & Protection of Metals; Chinese Academy of Sciences; Shenyang 110015)ZHANG Jian-qing (Department of Chemistry; Zhejiang University; Hangzhou 310013 )

全文: PDF(359 KB)

摘要: 采用极化曲线测定和恒电位集气研究铝在NaCl溶液中的电化学行为。NaCl溶液中添加入不同的阴离子后,铝的孔蚀电位和负差数效应系数会发生改变。不同阴离子使铝的负差数效应系数变化趋势和孔蚀活化电位变化趋势的不一致性说明铝电极的负差数效应现象是中间产物的低价离子在溶液中的化学反应造成的。

关键词 ：恒电位集气, 破裂电位, 负差数效应

Abstract：The electrochemical behavior of aluminum in 0.5mol/L NaCl and 0.49mol/L NaCl+0.01mol/L NaX (X=Cl-, Br-, I-, F-, NO3-, SO42-) solutions was studied by potentiodynamic method and potentiostatic hydrogen gathering measurements. When the above-mentioned anions were added into the solution, the breakdown potential and negative difference effect (NDE) of aluminum were found to change. The breakdown potential shift resulted from the anion competitive adsorption on aluminum surface in the solution. The change of NDE could be explained by the theory of hard-soft-acid-base (HSAB). The inconsistency ofchanging trend of the breakdown potential with NDE implied that NDE of aluminum was probably caused by low valence Al+ chemical reaction in solution.

Key words： Potentiostatic hydrogen gethering Breakdown potential Negative difference effect (NDE)

收稿日期: 1998-06-25

基金资助:国家自然科学基金资助项目

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引用本文:

许刚;曹楚南;林海潮;张鉴清. 阴离子对铝电极电化学行为的影响[J]. 中国腐蚀与防护学报, 1998, 18(3): 209-213.
. INFLUENCE OF ANION ON ELECTROCHEMICAL BEHAVIOR OF ALUMINUM. J Chin Soc Corr Pro, 1998, 18(3): 209-213.

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https://www.jcscp.org/CN/ 或 https://www.jcscp.org/CN/Y1998/V18/I3/209

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