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Effect of Potential on Crevice Corrosion Kinetics of Alloy 22

M.A. Rodríguez, R.M. Carranza

2010escorrosionalloyelectrochemistrycrevicekinetics

Abstract

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Alloy 22 (UNS N06022) is a Ni-Cr-Mo alloy, highly resistant to localized corrosion, with applications in high-level nuclear waste containers. This study aims to investigate the effect of potential on the kinetics of chloride-induced crevice corrosion of Alloy 22 at 90°C. Electrochemical tests, including cyclic potentiodynamic polarization (CPP) curves and electrochemical impedance spectroscopy (EIS), were conducted to establish the corrosion behavior. Results show that crevice corrosion susceptibility is independent of bulk solution pH but is significantly influenced by potential. Two distinct regions were identified in polarization tests: an incubation phase followed by initiation and propagation of crevice corrosion. The crevice corrosion current density increased with potential, reaching a maximum of approximately 20 mA/cm², while the absence of pitting corrosion was attributed to the small current density observed. This research provides critical insights into the corrosion mechanisms affecting Alloy 22 in chloride environments, contributing to its application in corrosion-resistant barriers.

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Cite This Work

@article{0c622a9d-ab76-4ff9-91d9-9fb8f2611b87,
  title={Effect of Potential on Crevice Corrosion Kinetics of Alloy 22},
  author={M.A. Rodríguez and R.M. Carranza},
  year={2010},
  language={es}
}
TY  - JOUR
TI  - Effect of Potential on Crevice Corrosion Kinetics of Alloy 22
AU  - M.A. Rodríguez
AU  - R.M. Carranza
PY  - 2010
LA  - es
ER  -

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