Abstract
The nature of passive films on oxidized ferrosilicide (Fe.r-Si) alloy electrodes has been studied as a function of alloy composition [0-30 mass percent (m/o) Si] in deoxygenated borate and phthalate buffers using photocurrent spectroscopy, impedance, and x-ray photoelectron spectroscopy (XPS). Passivation was shown to be due to a silica containing Fe(III) oxide film, exhibiting n-type semiconducting properties with a bandgap of 1.9-2.02 eV, for 0-15.8 m/o Si ferrosilicon alloy compositions. The photoelectrochemical and XPS results showed clear evidence of overgrowth by silica, thus explaining the superior corrosion resistance of ferrosilicides compared with iron. No boron species were found to be incorporated in the oxide film.
| Original language | English |
|---|---|
| Pages (from-to) | 951-957 |
| Number of pages | 7 |
| Journal | Journal of The Electrochemical Society |
| Volume | 138 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 1991 |
UN SDGs
This output contributes to the following UN Sustainable Development Goals (SDGs)
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SDG 7 Affordable and Clean Energy
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Renewable Energy, Sustainability and the Environment
- Condensed Matter Physics
- Surfaces, Coatings and Films
- Materials Chemistry
- Electrochemistry
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