Corrosion Mechanisms of Copper Investigated by Channel Flow Electrode Method and Electrochemical Impedance Spectroscopy

通道流电极法和电化学阻抗谱研究铜的腐蚀机理

• 批准号: 15560630
• 负责人: ITAGAKI Masayuki
• 金额: $ 1.41万
• 依托单位: Tokyo University of Science
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2003
• 资助国家: 日本
• 起止时间: 2003 至 2004
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-15560630/
• 关键词: copper; corrosion; channel flow electrode; electrochemical impedance; 塩化物イオン; 硫酸イオン; チャンネルフロー電極法; アノード溶解反応機構

Anodic dissolution mechanisms of copper in many kinds of electrolyte solutions were investigated by a channel flow electrode method and an electrochemical impedance spectroscopy. The detections of cuprous and cupric ions, which are dissolved from copper working electrode, are carried out simultaneously with the measurements of polarization curves. On the basis of reaction parameters obtained by the above-mentioned experiments, the detail dissolution mechanisms of copper were discussed.The roles of ions presenting in the electrolyte solutions were classified into as follows.The species accelerating the dissolution rate : Cl^-,SO_4^<2->,H_2PO_4^-,SO_2^-,NO_3^-,NO_2^-,ClO^-.The species inhibiting the dissolution rate : HPO_4^<2->.The species whose role depends on the environment : HCO_3^-,CO_3^<2->,NH_4^+.

采用通道流动电极法和电化学阻抗谱法研究了铜在多种电解质溶液中的阳极溶解机理。在测量极化曲线的同时，对铜工作电极中溶解的铜和铜离子进行了检测。根据上述实验得到的反应参数，对铜的溶解机理进行了详细的探讨。离子在电解质溶液中的作用分为以下几类。物种加速溶解率:Cl ^ -, SO_4 ^ < 2 - >, H_2PO_4 ^ -二氧化硫^,NO_3 ^ - NO_2 ^, ClO ^ -。抑制溶解速率的物质：HPO_4^<2->。作用取决于环境的物质：HCO_3^-，CO_3^<2->,NH_4^+。