Evaluation of Time-Dependent Corrosion Inhibition Rate for f-MWCNT-BCP Composite Coatings on 316L Stainless Steel in Simulated Body Fluid for Orthopedic Implantation

Appl Biochem Biotechnol. 2024 Mar;196(3):1544-1557. doi: 10.1007/s12010-023-04602-x. Epub 2023 Jul 11.

Abstract

A well-developed-multiwall carbon nanotube (f-MWCNT)/biphasic calcium phosphate (BCP) composites were synthesized using ultrasonication method for orthopedic implantation applications. The formation of composites and its phase was confirmed by using X-ray diffraction. The presence of various functional groups was identified by using Fourier transform infra-red (FT-IR) spectroscopy. The presence of f-MWCNT was confirmed by Raman spectroscopy. High-resolution transmission electron microscopy (HR-TEM) analysis revealed that BCP units were bound by the surface of f-MWCNTs. The synthesized composites were coated on medical grade 316L stainless steel substrates using electro deposition technique. To determine its corrosion resistance characteristics, the developed substrates were exposed to a simulated bodily fluid (SBF) solution for 0, 4, and 7 days. These results strongly suggest that the coated composites can be utilized for bone tissue repair.

Keywords: 316L stainless steel; Artificial body fluid; Biphasic calcium phosphate; Corrosion; Multiwall carbon nanotubes.

MeSH terms

  • Body Fluids*
  • Corrosion
  • Hydroxyapatites*
  • Materials Testing
  • Spectroscopy, Fourier Transform Infrared
  • Stainless Steel* / chemistry

Substances

  • hydroxyapatite-beta tricalcium phosphate
  • Stainless Steel
  • Hydroxyapatites