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http://dx.doi.org/10.5012/jkcs.2014.58.5.437

Hydrodynamic and Oxygen Effects on Corrosion of Cobalt in Borate Buffer Solution  

Kim, Younkyoo (Department of Chemistry, College of Natural Science, Hankuk University of Foreign Studies)
Publication Information
Abstract
The electrochemical corrosion and passivation of Co-RDE in borate buffer solution was studied by Potentiodynamic and electrochemical impedance spectroscopy. The mechanisms of both the active dissolution and passivation of cobalt and the hydrogen evolution in reduction reaction were hypothetically established while utilizing the Tafel slope, the rotation speed of Co-RDE, impedance data and the pH dependence of corrosion potential. Based on the EIS data, an equivalent circuit was suggested. In addition, the electrochemical parameters for specific anodic dissolution regions were carefully measured. An induction loop in Nyquist plot measured at the open-circuit potential was observed in the low frequency, and this could be attributed to the adsorption-desorption behavior in the corrosion process.
Keywords
Cobalt; Corrosion; Passivation; Borate buffer; Hydrodynamic effect;
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1 Metikos-Hukovic, M.; Balic, R. Corros. Sci. 2007, 49, 3570.   DOI   ScienceOn
2 Davis, J. R. Nickel, Cobalt, and Their Alloys; ASM International, Materials Park: OH, 2000; p 442.
3 Koch, G. H.; Brongers, M. P. H.; Thomson, N. G.; Virmani, Y. P.; Payer, J. H. Corrosion Cost and Preventive Strategies in the United States; Report No. FHWA-RD-01-156, CC Technologies Laboratories, Inc./NACE International: Doublin, OH/Houston, TX, 2001; p 773.
4 Osaka, T. Electrochim. Acta 2000, 45, 3311.   DOI   ScienceOn
5 Contu. F.; Elsner, B.; Behnei, H. Corros. Sci. 2005, 47, 1863.   DOI   ScienceOn
6 Pontinha, M.; Faty, S.; Walls, H. G.; Ferreira, M. G. S.; Da Cunha Belo, M. Corros. Sci. 2006, 48, 2971.   DOI   ScienceOn
7 Gallant, D.; Simard, S. Corros. Sci. 2005, 47, 1810.   DOI   ScienceOn
8 Gallant, D.; Pezolet, M.; Jacques, A.; Simard, S. Corros. Sci. 2006, 48, 2547.   DOI
9 Gallant, D.; Pezolet, M.; Simard, S. Electrochim. Acta 2007, 52, 4927.   DOI   ScienceOn
10 Kim, Y.; Chon, J.-K. J. Korean Chem. Soc. 2007, 51, 479.   DOI   ScienceOn
11 Calderon, J. A.; Barcia, O. E.; Mattos, O. R. Corros. Sci. 2008, 50, 2101.   DOI
12 Chon, J.-K.; Kim, Y. J. Korean Electrochem. Soc. 2007, 10, 14.   DOI
13 Bard, A. J.; Faulkner, L. R. Electrochemical methods, 2nd ed.; John-Wiley: New York, 2001; p 341.
14 Orazem, M. E.; Shulka, P.; Membrino, M. A. Electrochim. Acta 2002, 47, 2027.   DOI   ScienceOn
15 Heusler, K. E. Corros. Sci. 1966, 6, 183.   DOI   ScienceOn
16 Epelboin, I.; Gabrielli, C.; Keddam, M.; Takenouti, H. Electrochim. Acta 1975, 20, 913.   DOI   ScienceOn
17 Gimenez-Romero, D.; Garcia-Jareno, J. J.; Vincente, F. Electrochem. Commun. 2003, 5, 722.   DOI   ScienceOn
18 Gimenez-Romero, D.; Garcia-Jareno, J. J.; Vincente, F. J. Electroanal. Chem. 2004, 572, 235.   DOI   ScienceOn
19 Bard, A. J. Ed. Encyclopedia of Electrochemistry of the Elements, Vol. IX(A); Marcel Dekker: New York, 1982; Chapter IXa-3.
20 Bockris, J. O'M. Khan, S. U. M. Surface Electrochemistry; Plenum Press: New York, 1993; Chapter 3.
21 Badawy, W. A.; Al-Kharafi, F. M.; Al-Ajimi, J. R. J. Appl. Electrochem. 2000, 30, 693.   DOI   ScienceOn
22 Byers, H. G. J. Am. Chem. Soc. 1908, 30, 1718.   DOI
23 Heusler, K. E. Corros. Sci. 1965, 6, 183.
24 Sazou, D.; Pagitsas, M. J. Electroanal. Chem. 1991, 304, 171.   DOI   ScienceOn
25 Behl, W. K.; Toni, J. E. J. Electroanal. Chem. 1971, 31, 63.   DOI   ScienceOn
26 Chon, J.-K.; Paik, W. J. Korean Chem. Soc. 1974, 18, 391.
27 Burnstein, G. T.; Davies, D. H. Corros. Sci. 1980, 20, 989.   DOI   ScienceOn
28 Foelske, A.; Strehblow, H. H. Surf. Interface Anal. 2000. 29, 548.   DOI
29 Pourbaix, M. Atlas of Electrochemical Equilibria (English Ed. by J. A. Franklin), Nat. Assoc. Corr. Eng.: Houston, 1974; pp 322-329.
30 Schuberta, N.; Schneiderb, M.; Michealisa, A. Electrochim. Acta 2013, 113, 748.   DOI   ScienceOn
31 Real, S. G.; Ribotta, S. B.; Arvia, A. J. Corros. Sci. 2008, 50, 463.   DOI   ScienceOn