Medical equipment antiseptic processes using the atmospheric plasma sprayed copper coatings

Area of Science:

• Materials Science
• Surface Engineering
• Biomedical Engineering

Background:

• Antibacterial surfaces are crucial for reducing microbial contamination.
• Copper and its alloys are known for their inherent antimicrobial properties.
• Developing effective antibacterial coatings on common materials like stainless steel is of significant interest.

Purpose of the Study:

• To deposit copper coatings onto 316 stainless steel substrates using atmospheric plasma spraying.
• To characterize the physical, chemical, and morphological properties of the copper coatings.
• To evaluate the antibacterial efficacy of the coated surfaces against common bacteria.

Main Methods:

• Atmospheric plasma spraying for copper coating deposition.
• X-ray diffraction (XRD), Scanning Electron Microscopy (SEM), Backscattered Electron Microscopy (BSE), and Energy Dispersive X-ray Spectroscopy (EDX) for material characterization.
• Microhardness testing, coating thickness, and adhesion strength evaluation.
• Antibacterial assays using Gram-negative (Escherichia coli) and Gram-positive (Staphylococcus aureus) bacteria.

Main Results:

• Successful deposition of copper coatings on stainless steel substrates.
• Characterization confirmed the composition, microstructure, and morphology of the coatings.
• Copper coatings exhibited improved microhardness, thickness, and adhesion strength.
• Significant reduction in bacterial growth on copper-coated surfaces compared to uncoated stainless steel.

Conclusions:

• Copper coatings significantly enhance the antibacterial properties of 316 stainless steel.
• The developed coating demonstrates effective antimicrobial behavior against both Gram-negative and Gram-positive bacteria.
• This study highlights the potential of copper-coated stainless steel as an advanced antibacterial surface material.