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The Estimation of Localized Corrosion Behavior of Ni-Based Dental Alloys Using Electrochemical Techniques

Daniel Mareci, Romeu Chelariu

2012encorrosiondentalalloyselectrochemicalnickel

Abstract

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This study investigates the electrochemical behavior of five non-precious nickel (Ni)-based dental casting alloys in acidified artificial saliva to understand their localized corrosion resistance. The objective is to evaluate the efficacy of these alloys compared to nickel using cyclic potentiodynamic polarization (CCP) and electrochemical impedance spectroscopy (EIS), with further observations through scanning electron microscopy (SEM) post-tests. The results indicate that the Ni-Cr alloys, containing chromium at 14-18%, exhibit susceptibility to localized corrosion. Notably, the Ni-Cr-Mo alloy with chromium content around 13% and 9% molybdenum shows a critical breakdown, despite having a zero corrosion potential, with a significant difference of approximately 650 mV between them. Conversely, the Ni-Cr-Mo alloys with higher chromium (22-25%) and molybdenum (9-11%) contents demonstrate a considerably larger passive range in the polarization curve, rendering them immune to pitting corrosion. The pitting resistance equivalent (PRE) of approximately 54 suggests that these Ni-based alloys possess enhanced pitting corrosion resistance, making them suitable for dental applications.

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Cite This Work

@article{e24985d0-0579-4851-9ac9-d2f996677d91,
  title={The Estimation of Localized Corrosion Behavior of Ni-Based Dental Alloys Using Electrochemical Techniques},
  author={Daniel Mareci and Romeu Chelariu},
  year={2012},
  language={en}
}
TY  - JOUR
TI  - The Estimation of Localized Corrosion Behavior of Ni-Based Dental Alloys Using Electrochemical Techniques
AU  - Daniel Mareci
AU  - Romeu Chelariu
PY  - 2012
LA  - en
ER  -

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