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The effects of film thickness and incorporated anions on pitting corrosion of aluminum with barrier-type oxide films formed in neutral borate and phosphate electrolytes
| Title: | The effects of film thickness and incorporated anions on pitting corrosion of aluminum with barrier-type oxide films formed in neutral borate and phosphate electrolytes |
| Authors: | Habazaki, Hiroki Browse this author →KAKEN DB | | Nishimura, Rokuro Browse this author | | Okitsu, Kenji Browse this author | | Inoue, Hiroyuki Browse this author | | Kiriyama, Ikuo Browse this author | | Kataoka, Fumitaka Browse this author | | Sakairi, Masatoshi Browse this author | | Takahashi, Hideaki Browse this author |
| Keywords: | Aluminum | | Pitting corrosion | | Anodic film | | Chloride solution | | Ion selectivity |
| Issue Date: | Feb-2014 |
| Publisher: | Springer |
| Journal Title: | Journal of solid state electrochemistry |
| Volume: | 18 |
| Issue: | 2 |
| Start Page: | 369 |
| End Page: | 376 |
| Publisher DOI: | 10.1007/s10008-013-2192-2 |
| Abstract: | The pitting corrosion behavior of high-purity aluminum covered with barrier-type anodic films, which are formed in neutral borate and phosphate electrolytes, has been examined in 0.5 mol dm(-3) NaCl solution at an applied potential of -0.6 V versus Ag/AgCl, which is slightly nobler than the pitting potential of -0.64 V in the same solution. The pitting current density, i (p), increased with time after an incubation time, t (i). The double logarithmic plot of i (p) and polarization time, t, reveal two straight lines, which are separated at the time, tau. The slope becomes larger after tau for the specimens anodized in the phosphate electrolyte, while it becomes smaller for those in the borate electrolyte. Both the t (i) and tau increase with the thickness of the anodic films, and at the similar film thickness, they are much larger for the anodic films formed in the phosphate electrolyte than for those in the borate electrolyte. The corrosion process can be divided into three stages: the incubation period up to t (i), the pit nucleation period before tau, and the pit growth period after tau. We have discussed the different pitting corrosion behavior of the aluminum specimens covered with the anodic films formed in the borate and phosphate electrolytes in terms of ion selectivity of the anodic films. |
| Rights: | The final publication is available at link.springer.com |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/57823 |
| 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: 幅崎 浩樹
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