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<p>In order to improve corrosion characteristics and antibacterial performance, hydrofluoric acid (HF)-treated magnesium alloy was subjected to the preparation of curcumin-loaded chitosan (Cur-loaded CS). Potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) were employed to assess the corrosion performance, and the approach of disk diffusion was used to assess the antibacterial characteristics. The HF-treated and magnesium alloy samples’ corrosion rate was found to be shifted to fewer negative values and the corrosion current density was reduced by the Cur-loaded CS coating. The charge transfer resistance of the Mg-based substrate is increased by the Cur-loaded CS, as shown by the EIS assessment. The development of a compact, homogeneous, and thick Cur-loaded CS film which serves as a barrier that hinders additional penetration of an aggressive solution into the substrate is considered to be responsible for the enhanced corrosion behavior. Curcumin added to the chitosan coating layer provides its antibacterial properties against <i>Escherichia coli</i> and <i>Staphylococcus aureus</i>. This renders the chitosan film loaded with curcumin a viable option for protecting the magnesium-based substrate. To tackle bacterial infections after surgery, a chitosan-based coating with excellent corrosion resistance and antibacterial characteristics is being developed.</p>

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Curcumin-Loaded Chitosan Coatings for Corrosion Protection and Antibacterial Enhancement of HF-Treated Mg Alloy

  • 期刊论文

  • 发表日期：

    2025年7月17日

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  • Abdulqader Abduljalel Ibrahim,
  • Mojtaba Nasr-Esfahani,
  • Hamid Reza Bakhsheshi-Rad

摘要

In order to improve corrosion characteristics and antibacterial performance, hydrofluoric acid (HF)-treated magnesium alloy was subjected to the preparation of curcumin-loaded chitosan (Cur-loaded CS). Potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) were employed to assess the corrosion performance, and the approach of disk diffusion was used to assess the antibacterial characteristics. The HF-treated and magnesium alloy samples’ corrosion rate was found to be shifted to fewer negative values and the corrosion current density was reduced by the Cur-loaded CS coating. The charge transfer resistance of the Mg-based substrate is increased by the Cur-loaded CS, as shown by the EIS assessment. The development of a compact, homogeneous, and thick Cur-loaded CS film which serves as a barrier that hinders additional penetration of an aggressive solution into the substrate is considered to be responsible for the enhanced corrosion behavior. Curcumin added to the chitosan coating layer provides its antibacterial properties against Escherichia coli and Staphylococcus aureus. This renders the chitosan film loaded with curcumin a viable option for protecting the magnesium-based substrate. To tackle bacterial infections after surgery, a chitosan-based coating with excellent corrosion resistance and antibacterial characteristics is being developed.