An investigation of the corrosion behavior of zinc-coated stainless steel orthodontic wires: the effect of physical vapor deposition method

BMC Oral Health. 2024 May 9;24(1):501. doi: 10.1186/s12903-024-04242-5.

Abstract

Background: Releasing of metal ions might implicate in allergic reaction as a negative subsequent of the corrosion of Stainless Steel (SS304) orthodontic wires. The aim of this study was to evaluate the corrosion resistance of zinc-coated (Zn-coated) SS orthodontic wires.

Methods: Zinc coating was applied on SS wires by PVD method. Electrochemical impedance spectroscopy (EIS), Potentiodynamic polarization tests and Tafel analysis methods were used to predict the corrosion behavior of Zn-coated and uncoated SS wires in both neutral and acidic environments.

Results: The values of Ecorr ,icorr and Rct ,which were the electrochemical corrosion characteristics, reported better corrosion behavior of Zn-coated SS wires against uncoated ones in both artificial saliva and fluoride-containing environments. Experimental results of the Tafel plot analyses were consistent with that of electrochemical impedance spectroscopy analyses for both biological solutions.

Conclusion: Applying Zn coating on bare SS orthodontic wire by PVD method might increase the corrosion resistance of the underlying stainless-steel substrate.

Keywords: Biocompatible; Coated materials; Corrosion; Orthodontic wires; Stainless steel; Zinc.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Coated Materials, Biocompatible / chemistry
  • Corrosion
  • Dental Alloys / chemistry
  • Dielectric Spectroscopy*
  • Fluorides / chemistry
  • Humans
  • Hydrogen-Ion Concentration
  • Materials Testing*
  • Orthodontic Wires*
  • Potentiometry
  • Saliva, Artificial* / chemistry
  • Stainless Steel* / chemistry
  • Surface Properties
  • Zinc* / chemistry

Substances

  • Stainless Steel
  • Zinc
  • Saliva, Artificial
  • Dental Alloys
  • Coated Materials, Biocompatible
  • Fluorides