TITLE

Corrosion Behaviour of Amorphous Niobium Oxide Coatings

AUTHOR(S)
Rojas, P. N.; Rodil, S. E.
PUB. DATE
February 2012
SOURCE
International Journal of Electrochemical Science;Feb2012, Vol. 7 Issue 2, p1443
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Niobium oxide films were evaluated as possible candidates for corrosion resistant biomedical coatings using electrochemical methods. The films were deposited on medical grade stainless steel using a reactive magnetron sputtering system starting from a pure Nb target. The long-term stability of the films was evaluated by electrochemical impedance spectroscopy (EIS) as a function of time up to 500 hrs using two different simulated body fluids. The results indicated that the electrochemical stability of the coatings is highly dependent upon the chemical composition of the solution. In 0.89% NaCl, the coating failed by delamination, while in the Hartman solution, the niobium oxide film was very stable providing protection to the stainless steel substrate.
ACCESSION #
74609361

 

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