2016 Fiscal Year Final Research Report
Sensing of a crevice corrosion by pattern recognition of an electrochemical oscillation
| Project/Area Number |
15K13806
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Inorganic industrial materials
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| Research Institution | Kyoto University |
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Principal Investigator |
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| Co-Investigator(Renkei-kenkyūsha) |
SAKKA Tetsuo 京都大学, 大学院工学研究科, 教授 (10196206)
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| Project Period (FY) |
2015-04-01 – 2017-03-31
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| Keywords | 腐食 / センシング / 非線形化学 |
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| Outline of Final Research Achievements |
We studied an analysis of electrochemical oscillations observed in anodic dissolution of a metallic Fe electrode. The analysis of the oscillation gave important information on electrochemical dissolution of a metallic Fe electrode placed within a crevice. The shape of current oscillations measured under a constant potential near the Flade potential was strongly related to the local environment in the vicinity of the electrode surface. Especially, it indirectly show the increase of local pH within the crevice. In the present case, we detected the increase of H+ concentration which was four times higher in the crevice than the bulk. Also, the amplitude of the current oscillation gave the information of active electrode area within the crevice. The active electrode area estimated from the analysis of amplitude nicely fitted in that evaluated by microscope observations.
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| Free Research Field |
電気化学
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