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Evaluation of metal cation effects on galvanic corrosion behavior of the A5052 aluminum alloy in low chloride ion containing solutions by electrochemical noise impedance
| Title: | Evaluation of metal cation effects on galvanic corrosion behavior of the A5052 aluminum alloy in low chloride ion containing solutions by electrochemical noise impedance |
| Authors: | Sakairi, M. Browse this author →KAKEN DB | | Sasaki, R. Browse this author | | Kaneko, A. Browse this author | | Seki, Y. Browse this author | | Nagasawa, D. Browse this author |
| Keywords: | Metal cation | | Aluminum alloy | | Galvanic corrosion | | Electrochemical noise impedance | | FFT |
| Issue Date: | 10-Jun-2014 |
| Publisher: | Elsevier |
| Journal Title: | Electrochimica Acta |
| Volume: | 131 |
| Start Page: | 123 |
| End Page: | 129 |
| Publisher DOI: | 10.1016/j.electacta.2014.02.010 |
| Abstract: | The effects of metal cations on the galvanic corrosion behavior of the A5052 aluminum alloy in low chloride ion containing solutions (tap water) were examined by electrochemical noise impedance. The electrochemical noise impedance and conductance were calculated by the power spectral density (PSD) of the galvanic current and potential. The oscillations in the galvanic current correlate well with the oscillations in the potential. The total charge (summation of galvanic current) during galvanic corrosion tests was suppressed by the addition of Ca2+, while it was increased with Mg2+ addition. Only a small effect on mean impedance and conductance was observed in solutions with Cu2+ and Mg2+, while addition of Ca2+ strongly influences both the mean impedance and conductance. These results may be explained by the passive film structure changes due to the metal cations. The results obtained in this study indicate that metal cations play a very important role in the corrosion behavior of A5052 aluminum alloys in tap water. |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/56996 |
| Appears in Collections: | 工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 坂入 正敏
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