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Materiale Plastice
Cite as: Mater. Plast.
https://doi.org/10.37358/Mat.Plast.1964

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Materiale Plastice (Mater. Plast.), Year 2009, Volume 46, Issue 4,





MIHAELA MINDROIU, CRISTIAN PIRVU, SIMONA POPESCU, IOANA DEMETRESCU Polypyrrole as Conducting Polymer Coating on Ti6Al7Nb Alloy


Abstract:
Conducting polymer coating has been used to improve the surface performance of metallic materials, as Ti6Al7Nb alloy. Polypyrrole (PPy) was electrochemically deposited from 0,2 M oxalic acid aqueous monomer solutions by three different methods: potentiostatic, galvanostatic and potentiodynamic techniques. The stability of PPy / Ti-6Al-7Nb surface has been studied by electrochemical methods in Hank’s Balanced Salt Solution (HBSS) by Tafel tests and cycle voltammetry. The PPy / Ti-6Al-7Nb biofluid interface was analysed by electrochemical impedance spectroscopy (EIS) and the corresponding equivalent circuits were proposed. The structural infrared analysis and morphology of conducting polymer layer on titanium alloy have been evaluated. Keywords: Polypyrrole, Ti6Al7Nb alloy, stability properties, EIS, AFM



Issue: 2009 Volume 46, Issue 4
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