Hexagonal boron nitride impregnated silane composite coating for corrosion resistance of magnesium alloys for temporary bioimplant applications

Saad Al-Saadi, Parama Chakraborty Banerjee, M. R. Anisur, R. K. Singh Raman

Research output: Contribution to journalArticleResearchpeer-review

10 Citations (Scopus)

Abstract

Magnesium and its alloys are attractive potential materials for construction of biodegradable temporary implant devices. However, their rapid degradation in human body fluid before the desired service life is reached necessitate the application of suitable coatings. To this end, WZ21 magnesium alloy surface was modified by hexagonal boron nitride (hBN)-impregnated silane coating. The coating was chemically characterised by Raman spectroscopy. Potentiodynamic polarisation and electrochemical impedance spectroscopy (EIS) of the coated alloy in Hanks’ solution showed a five-fold improvement in the corrosion resistance of the alloy due to the composite coating. Post-corrosion analyses corroborated the electrochemical data and provided a mechanistic insight of the improvement provided by the composite coating.

Original languageEnglish
Article number518
Number of pages13
JournalMetals
Volume7
Issue number12
DOIs
Publication statusPublished - 23 Nov 2017

Keywords

  • Electrochemical impedance spectroscopy
  • Hexagonal boron nitride
  • Magnesium
  • Raman spectroscopy
  • Silane coating

Cite this