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Effect of diffusion coating of Nd on the corrosion resistance of biodegradable Mg implants in simulated physiological electrolyte ☆

Paper ID Volume ID Publish Year Pages File Format Full-Text
574 51 2013 7 PDF Available
Title
Effect of diffusion coating of Nd on the corrosion resistance of biodegradable Mg implants in simulated physiological electrolyte ☆
Abstract

The effect of diffusion coating of Nd on the corrosion performance of Mg–1.2%Nd–0.5%Y–0.5%Zr–0.4%Ca alloy (EW10X04) used as a new structural material for biodegradable implants was evaluated in a simulated physiological electrolyte. The initial Nd layer with a thickness of 1 μm was obtained by a physical vapor deposition process in an electron gun evaporator. This was followed by a diffusion coating process carried out at high temperature in a protective atmosphere. The microstructure of the diffusion coating system was examined using scanning electron microscopy, X-ray diffraction and X-ray photoelectron spectroscopy analysis. The corrosion resistance was evaluated by potentiodynamic polarization and electrochemical impedance spectroscopy in a simulated physiological electrolyte in the form of 0.9% NaCl solution saturated with Mg(OH)2. The results of the corrosion tests clearly demonstrated that the corrosion resistance of the alloy with the diffusion coating layer was significantly improved compared to the base alloy. This was mainly due to the relatively continuous network of the secondary passive phase Mg41Nd5 that acts as an effective corrosion barrier and the beneficial effect of enriching the oxide film with Nd and Nd oxides such as Nd2O3 and Nd6O11.

Keywords
Magnesium; Biodegradable implants; Diffusion coating; Neodymiun
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Effect of diffusion coating of Nd on the corrosion resistance of biodegradable Mg implants in simulated physiological electrolyte ☆
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Publisher
Database: Elsevier - ScienceDirect
Journal: Acta Biomaterialia - Volume 9, Issue 10, November 2013, Pages 8624–8630
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us