Spectroscopic ellipsometry and esca studies of the passive film on iron
β Scribed by B.D. Cahan; C.T. Chen
- Publisher
- Elsevier Science
- Year
- 1980
- Weight
- 41 KB
- Volume
- 96
- Category
- Article
- ISSN
- 0167-2584
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Ahatraet-Impedance measurements have been combined with ellipsometric measurements. The optical properties change with varying potential due to the formation of a thin layer or to changes in the composition of the passive f&t. This combination of techniques can, therefore, give more insight into the
The growth of passive film on iron has been traced during potential sweep at various sweep rates in a neutral borate solution at pH 8.4. The transient thickness increase from a stationary state at 0.0 V (vs. Ag-AgC1) was measured by automated ellipsometry by which the ellipsometric parameters β’ and
## Abstract Effect of chlorides on the passive film formed on iron in borate buffer has been investigated by Auger Electron Spectroscopy (AES) and coulometric methods. AES measurements have not given any evidence for chloride entry into the film. Amount of charges necessary to cathodically reduce t