Abstract
The influence of Cr on the electronic properties of the passive film on B30 alloy in NaOH solution was studied via electrochemical impedance spectra(EIS), potentiodynamic curve and Mott-Schottky plot. The Cr doped in the passive film on B30 alloy was detected by X-ray photoelectron spectroscopy(XPS). XPS results show that Cr2O3 appeared on the passive film, which implied the enhanced anti-corrosion of B30 alloy. The passive film showed a p-type semi-conductive character. The acceptor density(NA) was in an order of magnitude of 1022 cm−3, and N A decreased with the increment of Cr. EIS results show that the film resistance(R f) increased with increasing the amount of Cr. The diffusion coefficient(D 0) was calculated to be in a range of 10−16−10−17 cm−2/s on the basement of point defect model(PDM).
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Supported by the Project of Enhanced Oil Recovery of Ground Technology Research of Changqing Oilfield, China (No.2012-E23).
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Shang, Y., Xiao, S., Qiu, X. et al. Influence of Cr on the electronic properties of passive film on B30 alloy in NaOH solution. Chem. Res. Chin. Univ. 31, 603–610 (2015). https://doi.org/10.1007/s40242-015-4469-8
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DOI: https://doi.org/10.1007/s40242-015-4469-8