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Metals 2017, 7(12), 518; https://doi.org/10.3390/met7120518

Hexagonal Boron Nitride Impregnated Silane Composite Coating for Corrosion Resistance of Magnesium Alloys for Temporary Bioimplant Applications

1
Department of Mechanical and Aerospace Engineering, Monash University, Clayton VIC-3800, Australia
2
Department of Chemical Engineering, Monash University, Clayton VIC-3800, Australia
*
Author to whom correspondence should be addressed.
Received: 27 September 2017 / Revised: 7 November 2017 / Accepted: 7 November 2017 / Published: 23 November 2017
(This article belongs to the Special Issue Corrosion of Magnesium Alloys)
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Abstract

Magnesium and its alloys are attractive potential materials for construction of biodegradable temporary implant devices. However, their rapid degradation in human body fluid before the desired service life is reached necessitate the application of suitable coatings. To this end, WZ21 magnesium alloy surface was modified by hexagonal boron nitride (hBN)-impregnated silane coating. The coating was chemically characterised by Raman spectroscopy. Potentiodynamic polarisation and electrochemical impedance spectroscopy (EIS) of the coated alloy in Hanks’ solution showed a five-fold improvement in the corrosion resistance of the alloy due to the composite coating. Post-corrosion analyses corroborated the electrochemical data and provided a mechanistic insight of the improvement provided by the composite coating. View Full-Text
Keywords: magnesium; hexagonal boron nitride; silane coating; Raman spectroscopy; electrochemical impedance spectroscopy magnesium; hexagonal boron nitride; silane coating; Raman spectroscopy; electrochemical impedance spectroscopy
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Al-Saadi, S.; Banerjee, P.C.; Anisur, M.; Raman, R.S. Hexagonal Boron Nitride Impregnated Silane Composite Coating for Corrosion Resistance of Magnesium Alloys for Temporary Bioimplant Applications. Metals 2017, 7, 518.

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