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Electrochemical noise analysis of galvanic corrosion of anodized aluminum in chloride environments

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タイトル: Electrochemical noise analysis of galvanic corrosion of anodized aluminum in chloride environments
その他のタイトル: 陽極酸化したアルミニウムのガルバニック腐食の電気化学ノイズ解析
著者: Sakairi, Masatoshi 著作を一覧する
Shimoyama, Ukiya 著作を一覧する
Takahashi, Hideaki 著作を一覧する
キーワード: electrochemical noise
galvanic corrosion
localized corrosion
発行日: 2006年 6月
出版者: 電気化学会
誌名: Electrochemistry 電気化学および工業物理化学
巻: 74
号: 6
開始ページ: 458
終了ページ: 462
抄録: A new type of electrochemical noise analysis technique with First Fourier Transformation, FFT, was applied to galvanic corrosion of barrier and porous type anodic oxide films formed on aluminum in 0.5 kmol/m(3) H3BO4 / 0.05 kmol/m(3) Na2B4O7 solutions with 0.01 kmol/m(3) NaCl. During localized corrosion, the current and potential were changed, with fluctuations and the potential and the current fluctuations show good correlation. The slope of the PSD spectra of both types of anodized specimens are about minus one (-1), just after localized corrosion started. This technique allows observation of electrochemical impedance changes during localized corrosion. The impedance spectra are independent of signal frequency and the impedance of porous types anodic oxide film specimens decrease with immersion time and increases with anodizing time.
資料タイプ: article (author version)
出現コレクション:雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

提供者: 坂入 正敏


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