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Evaluation of Heterogeneity in Thickness of Passive Films on Pure Iron by Scanning Electrochemical Microscopy
| Title: | Evaluation of Heterogeneity in Thickness of Passive Films on Pure Iron by Scanning Electrochemical Microscopy |
| Authors: | Fushimi, Koji Browse this author →KAKEN DB | | Azumi, Kazuhisa Browse this author →KAKEN DB | | Seo, Masahiro Browse this author |
| Keywords: | scanning electrochemical microscopy | | heterogeneity | | passive film | | film thickness | | iron | | grain orientation |
| Issue Date: | Apr-1999 |
| Publisher: | 日本鉄鋼協会 |
| Journal Title: | ISIJ International |
| Volume: | 39 |
| Issue: | 4 |
| Start Page: | 346 |
| End Page: | 351 |
| Publisher DOI: | 10.2355/isijinternational.39.346 |
| Abstract: | Scanning electrochemical microscopy (SECM) was applied to evaluate the heterogeneity of a passive film formed on a pure iron electrode in deaerated pH 8.4 borate solution. A probe current image of SECM was measured with a tip-generation/substrate-collection (TG/SC) mode in deaerated pH 8.4 borate solution containing 0.03 mol dm-3 Fe(CN)64- as a mediator. The difference in thickness of passive films formed on two iron plates at different potentials could be evaluated from the probe current image. The probe current image of the passivated iron surface with distinctive crystal grains was composed of the patch patterns, the shapes of which coincided completely with the shapes of the substrate crystal grains. The probe current flowed above the grain surface oriented to {100} plane was less than that above the grain surface oriented to {110} or {111} plane. The grain orientation dependence of probe current was ascribed to the difference in thickness of passive films formed on the crystal grains. |
| Type: | article |
| URI: | http://hdl.handle.net/2115/72742 |
| 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: 伏見 公志
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