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ELECTROCHEMICAL AND SPONTANEOUS PASSIVATION OF THE CoCr ALLOY AS CORROSION PROTECTION

Authors:

Łukasz Reimann1
1Silesian University of Technology, Institute of Materials Engineering and Biomaterials, Gliwice Poland

Received: 23.02.2017.
Accepted: 15.03.2017.
Available: 30.03.2017.

Abstract:

The aim of this work was to compare the level of protection of spontaneous and electrochemical passivation of the CoCr alloy against corrosion in environment simulating the conditions prevailing in the mouth.
Passivation layer was obtained as spontaneous in air at 23 °C for 1 and 24 hours and by electrochemical method by polarization at potentials 0 and 100 mV for 1 and 24 hours. The corrosion resistance tests was realized by potentiodynamic method in Fusayamya saliva solution.
Based on realized research it was concluded that electrochemical passivation better protects material from corrosion than passivation in air; extending the electrochemical passivation time results in greater corrosion resistance and higher passivation potential and longer time was related to formation of a thicker protective layer on the material’s surface.

Keywords:

Electrochemical passivation, spontaneous passivation, CoCr alloys, corrosion protection, conditions prevailing in the mouth

References:

[1] C. Manaranche, H.A. Hornberger, A proposal for the classification of dental alloys according to their resistance to corrosion. Dent Mater., 23 (11), 2007: pp.1428-1437.
[2] J-F. Liu, M-C. Lin, M-L. Hsu, U-M. Li, C-P. Lin, W-F. Tsai, C-F. Ai, L-K. Chen, H-H. Huang, Effect of nitriding surface treatment on the corrosion resistance of dental nickel–titanium files in 5.25% sodium hypochlorite solution. J Alloy Compd., 475 (-), 2009: pp.789-793.
[3] C. Diaz, J.W. Gerlach, S. Mandl, J.A. Garcia, Reduction of corrosion current of CoCr alloys by post-PIII oxidation. Surf Coat Tech., 256 (-), 2014: pp.59-63.
[4] L. Reclaru, H. Lüthy, P.Y. Eschler, A. Blatter, C. Susz, Corrosion behaviour of cobalt-chromium dental alloys doped with precious metals. Biomaterials, 26 (-), 2005: pp.4358-4365.
[5] D.M. Sarantopoulos, K.A. Beck, R. Holsen, D.W. Berzins, Corrosion of CoCr and NiCr dental alloys alloyed with palladium. J Prost Dent., 105 (1), 2010: pp.35-43.
[6] L.A. Dobrzański, Ł. Reimann, Influence of Cr and Co on hardness and corrosion resistance CoCrMo alloys used on dentures. J Arch Mat Manu Eng., 49(2), 2010: pp.193-199.
[7] L.A. Dobrzański, Ł. Reimann., C. Krawczyk, Effect of age hardening on corrosion resistance and hardness of CoCrMo alloys used in dental engineering. Arch Mat Sci Eng., 57 (1), 2012: pp.5-12.
[8] Ł. Reimann, L.A. Dobrzański, Influence of the casting temperature on dental Co-base alloys properties. Arch Mat Sci Eng., 60 (1), 2013: pp.5-12.
[9] EN ISO 17475:2008: Corrosion of metals and alloys. Electrochemical test methods. Guidelines for conducting potentiostatic and potentiodynamic polarization measurements
[10] A.W.E. Hodgson, S. Kurz, S. Virtanen, V. Fervel, C-O.A. Olsson, S. Mischler, Passive and transpassive behaviour of CoCrMo in simulated biological solutions. Electrochim Acta, 49 (13), 2004: pp.2167-2178.
[11] A. Kocijan, I. Milošev, B. Pihlar, Cobalt-based alloys for orthopaedic applications studied by electrochemical and XPS analysis. J Mat Sci Mat Med., 15 (6), 2004: pp.643-650.
[12] I. Milošev, H-H. Strehblow, The composition of the surface passive film formed on CoCrMo alloy in simulated physiological solution. Electrochim Acta, 48 (19), 2003: pp.2767-2774.

This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License (CC BY-NC 4.0)

Volume 9
Number 1
March 2024

Last Edition

Volume 9
Number 1
March 2024

How to Cite

L. Reimann, Electrochemical and Spontaneous Passivation of the CoCr Alloy as Corrosion Protection. Applied Engineering Letters, 2(1), 2017: 43-47.

More Citation Formats

Reimann, L. (2017). Electrochemical and Spontaneous Passivation of the CoCr Alloy as Corrosion Protection. Applied Engineering Letters2(1), 43-47.

Reimann, Łukasz, “Electrochemical and Spontaneous Passivation of the CoCr Alloy as Corrosion Protection.“ Applied Engineering Letters, vol. 2, no. 1, 2017, pp. 43-47.

Reimann, Łukasz, 2017. “Electrochemical and Spontaneous Passivation of the CoCr Alloy as Corrosion Protection.“ Applied Engineering Letters, 2 (1): 43-47.

Reimann, L. (2017). Electrochemical and Spontaneous Passivation of the CoCr Alloy as Corrosion Protection. Applied Engineering Letters, 2(1), pp. 43-47.

ELECTROCHEMICAL AND SPONTANEOUS PASSIVATION OF THE CoCr ALLOY AS CORROSION PROTECTION

Authors:

Łukasz Reimann1
1Silesian University of Technology, Institute of Materials Engineering and Biomaterials, Gliwice Poland

Received: 23.02.2017.
Accepted: 15.03.2017.
Available: 30.03.2017.

Abstract:

The aim of this work was to compare the level of protection of spontaneous and electrochemical passivation of the CoCr alloy against corrosion in environment simulating the conditions prevailing in the mouth.
Passivation layer was obtained as spontaneous in air at 23 °C for 1 and 24 hours and by electrochemical method by polarization at potentials 0 and 100 mV for 1 and 24 hours. The corrosion resistance tests was realized by potentiodynamic method in Fusayamya saliva solution.
Based on realized research it was concluded that electrochemical passivation better protects material from corrosion than passivation in air; extending the electrochemical passivation time results in greater corrosion resistance and higher passivation potential and longer time was related to formation of a thicker protective layer on the material’s surface.

Abstract:

Electrochemical passivation, spontaneous passivation, CoCr alloys, corrosion protection, conditions prevailing in the mouth

This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License (CC BY-NC 4.0)

Volume 9
Number 1
March 2024

Last Edition

Volume 9
Number 1
March 2024