Effects of surface alloying on electrochemical corrosion behavior of oxygen-plasma-modified biomedical magnesium alloy

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Guosong Wu
  • Kai Feng
  • Ali Shanaghi
  • Ying Zhao
  • Ruizhen Xu
  • Guangyin Yuan

Detail(s)

Original languageEnglish
Pages (from-to)3186-3195
Journal / PublicationSurface and Coatings Technology
Volume206
Issue number14
Publication statusPublished - 15 Mar 2012

Abstract

Mg-3Nd-0.2Zn-0.4Zr alloy with good mechanical properties is a new type of biodegradable magnesium alloy. In order to improve the surface stability in the initial healing stage and foster tissue growth on biomedical implants made of this Mg alloy, oxygen plasma immersion ion implantation (O-PIII) is conducted to modify the alloy surface. Although O-PIII increases the thickness of the surface oxide, no significant improvement in the surface corrosion resistance is observed. Hence, surface alloying with Al and Cr by means of high-energy ion implantation is conducted prior to O-PIII. The electrochemical data obtained in simulated body fluids, including polarization curves and electrochemical impedance spectra (EIS), reveal that the surface corrosion resistance is improved after surface alloying. Our results show that surface alloying with Cr produces the best result in this study. The improvement stems from the formation of Al or Cr-containing oxide films in the implanted layer. © 2012 Elsevier B.V.

Research Area(s)

  • Alloying, Biomaterials, Corrosion, Magnesium alloys, Plasma immersion ion implantation

Citation Format(s)

Effects of surface alloying on electrochemical corrosion behavior of oxygen-plasma-modified biomedical magnesium alloy. / Wu, Guosong; Feng, Kai; Shanaghi, Ali; Zhao, Ying; Xu, Ruizhen; Yuan, Guangyin; Chu, Paul K.

In: Surface and Coatings Technology, Vol. 206, No. 14, 15.03.2012, p. 3186-3195.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review