Antibacterial Efficacy of Wire Arc Sprayed Copper Coatings Against Various Pathogens
- 22 Downloads
The antimicrobial effect of copper (Cu) as well as its potentiality to reduce healthcare-associated infections is well recognized. In this study, a twin wire arc spray gun has been used to produce antibacterial copper coatings on stainless-steel (316L) surfaces. The thickness of coating was 120 ± 30 μm in average. In parallel, series of coating formation simulations were made using Comsol Multiphysics. The coating morphology was examined by scanning electron microscope (SEM) and its structure determined by x-ray diffraction (XRD). Surface roughness measurements were carried out on as-sprayed and polished surfaces by using a 3-D Profilometer. The coating antibacterial efficacy has been investigated considering standard and clinically isolated cultures such as standard ATCC 25922 Escherichia coli (E. coli), standard ATCC 29213 Staphylococcus Aureus (Staph. Aureus), clinically isolated Pseudomonas aeruginosa, Vancomycin-resistant Enterococcus (VRE) and Methicillin-resistant Staphylococcus aureus (MRSA). The predictions of simulations matched with the monitored data with an error below 10%. The coatings exhibited excellent antibacterial properties for all the pathogen types used.
Keywordsantibacterial coating biocidal copper numerical simulation wire arc spraying
Part of this study was funded by TUBITAK TEYDEB under the project number 7120870, which is greatly acknowledged. Authors also thank ITU BAP for their grant under the contract number of 38367. Authors extend their appreciation to Prof. Dr. Gultekin Goller, Huseyin Sezer and Husnu Ozturk for their support in the SEM studies of the coatings.
- 1.C.D. Salgado, K.A. Sepkowitz, J.F. John, J.R. Cantey, H.H. Attaway, K.D. Freeman, P.A. Sharpe, H.T. Michels, and M.G. Schmidt, Copper Surfaces Reduce the Rate of Healthcare-Acquired Infections in the Intensive Care Unit, 2013, 34(5), p 479-486Google Scholar
- 10.M.I. Boulos, P. Fauchais, and E. Pfender, Thermal Plasmas Fundamentals and Applications, Vol 1, Springer, Berlin, 1994, p 413-417Google Scholar
- 11.A.P. Abkenar, Wire Arc Spraying: Particle Production, Transport and Deposition, Ph.D. Thesis, University of Toronto, p 72-74. 2007. https://www.collectionscanada.gc.ca/obj/thesescanada/vol2/002/NR39723.PDF. Accessed 16 Sept 2018
- 13.T. Blackburn, Test Method for the Continuous Reduction of Bacterial Contamination on Copper Alloy Surfaces. 800R09004, Enviromental Protection Agency (EPA), 2009. https://nepis.epa.gov/Exe/ZyPURL.cgi?Dockey=P1003RIK.txt. Accessed 17 Sept 2018
- 18.S. Zimmermann, E. Vogli, M. Kauffeldt, M. Abdulgader, B. Krebs, B. Rüther, K. Landes, J. Schein, and W. Tillmann, Supervision and Measuring of Particle Parameters During the Wire-Arc Spraying Process with the Diagnostic Systems Accuraspray-g3 and LDA (Laser-Doppler-Anemometry), J. Therm. Spray Technol., 2010, 19(4), p 745-755CrossRefGoogle Scholar
- 25.S.L. Warnes, J.C. Highmore, and C.W. Keevil, Horizontal Transfer of Antibiotic Resistance Genes on Abiotic Touch Surfaces: Implications for Public Health, Am. Soc. Microbiol. mBio, 2012, 3(6), p 1-10Google Scholar