C. M. Giordano, M. Rinco´n Ortı´z
Alloy 22 (UNS N06022) is known for its high resistance to general and localized corrosion, but it can be susceptible to crevice corrosion under aggressive environmental conditions. This study aims to compare various electrochemical methods for measuring the repassivation potential of alloy 22, specifically employing techniques such as cyclic potentiodynamic polarization, Tsujikawa–Hisamatsu electrochemical methods, and more. The findings revealed that the potentiodynamic–galvanostatic–potentiodynamic technique consistently yielded the lowest repassivation potential within a shorter testing timeframe, marking it as the most conservative laboratory method. Additionally, the results showed that polytetrafluoroethylene (PTFE)-wrapped ceramic crevice formers produced more extreme crevice conditions, resulting in higher repassivation potentials compared to solid PTFE formers. Accurate torque values, exceeding 2 N m, were necessary to obtain reliable repassivation potential measurements, while surface roughness had a negligible impact on these values. This work contributes valuable insights for understanding the crevice corrosion behavior of alloy 22, which is pertinent for applications in engineered barriers for high-level nuclear waste isolation.
@article{16971efb-4b28-422a-99c0-00c6b5354e3e,
title={Crevice corrosion testing methods for measuring repassivation potential of alloy 22},
author={C. M. Giordano and M. Rinco´n Ortı´z},
year={2005},
language={en}
}TY - JOUR TI - Crevice corrosion testing methods for measuring repassivation potential of alloy 22 AU - C. M. Giordano AU - M. Rinco´n Ortı´z PY - 2005 LA - en ER -
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