Frontiers in Materials (Dec 2021)

Preliminary Studies for One-Step Fabrication of Metallic Iron-Based Coatings on Magnesium as Temporary Protection in Biodegradable Medical Application

  • Yuyun Yang,
  • Yuyun Yang,
  • Yuyun Yang,
  • Zizhong Shi,
  • Xiufang Cui,
  • Yuejun Liu,
  • Guo Jin,
  • Sannakaisa Virtanen,
  • Aldo R. Boccaccini,
  • Peng She

DOI
https://doi.org/10.3389/fmats.2021.786650
Journal volume & issue
Vol. 8

Abstract

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Iron and magnesium are being considered as promising candidates for biodegradable materials in medical applications, both materials having their specific advantages and challenges. A hybrid of metallic iron and magnesium in a layered composite is studied in the present work, to combine the merits of both metals. A single-step dip-coating method was employed to prepare the layered composite material. Morphology, composition, crystal structure and corrosion behavior of the Mg/Fe sheet were assessed by SEM, EDX, XRD, and electrochemical measurements. The Mg/Fe layered composite sheet is composed of the magnesium substrate, a 1–2 µm metallic iron coating, and a pompon-like Mg(OH)2/MgO top layer. Long-term open-circuit potential measurements revealed that the Mg/Fe sheet samples exhibit a “self-healing” effect in Dulbecco’s modified Eagle’s medium.

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