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Enhanced corrosion resistance of porous NiTi with plasma sprayed alumina coating
, Article Corrosion Engineering Science and Technology ; Volume 50, Issue 8 , 2015 , Pages 595-600 ; 1478422X (ISSN) ; Akbarinia, S ; Mohammadyani, D ; Sadrnezhaad, S. K ; Sharif University of Technology
Maney Publishing
2015
Abstract
In this study, corrosion behaviour of porous NiTi modified by plasma sprayed alumina coating has been investigated. Scanning electron microscopy and X-ray diffraction techniques were applied for the morphology and microstructure characterisation, while linear sweep voltammetry and electrochemical impedance spectroscopy were used for investigation of corrosion behaviour of coated and uncoated NiTi specimens. Induced couple plasma was conducted to measure ion release of the specimens in simulated body fluid at 37°C. The plasma sprayed Al2O3 coating on the porous NiTi improved the surface characteristics for biomedical applications. The alumina coating significantly hampered Ni ion release from...