Zinc/Silver Particle (Zn/AgP) Composite Coatings: Evaluation of Corrosion in Physiological Environments and Antibacterial Activity against P. aeruginosa
| Autor: | Arnulfo Terán-López, Berenice Castro-Rodríguez, R. Ortega, José G. Flores, Erika Acosta-Smith, José Mojica, Gabriel Trejo, Yolanda Reyes-Vidal, René H. Lara, Jorge Vazquez-Arenas, Francisco Javier Bacame-Valenzuela |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
silver nanoparticles
Materials science antibacterial coatings Scanning electron microscope Composite number zinc chemistry.chemical_element composites coatings Surfaces and Interfaces Zinc Electrolyte engineering.material Silver nanoparticle Surfaces Coatings and Films Corrosion Coating chemistry lcsh:TA1-2040 Materials Chemistry engineering lcsh:Engineering (General). Civil engineering (General) Dissolution Nuclear chemistry |
| Zdroj: | Coatings, Vol 10, Iss 337, p 337 (2020) Coatings Volume 10 Issue 4 |
| ISSN: | 2079-6412 |
| Popis: | In this work, zinc/silver particle (Zn/AgP) composite coatings were manufactured by electrodeposition to investigate their antibacterial capacity and corrosion rate in physiological environments. The morphology and composition of the coatings were analysed by glow-discharge optical emission spectroscopy and scanning electron microscopy coupled to an energy dispersive spectrometer. The results showed the formation of Zn/AgP composite coatings with a homogeneous distribution of Ag throughout the coating surface and depth. Additionally, the Ag content in the coatings increased with increasing concentrations of AgP in the electrolytic solution. The Zn/AgP composite coatings with 0.30 wt.% Ag on the surface (0.30 wt.% Agsurf) showed efficiencies close to 100% growth inhibition of the bacteria Pseudomonas aeruginosa after 10 min of contact. The corrosion rate of the Zn and the Zn/AgP (0.30 wt.% Agsurf) coatings in Hank&rsquo s, Ringer&rsquo s and Phosphate buffered saline (PBS) solutions was evaluated by polarization curves and by immersion tests over different time periods (7, 30, and 40 days). The corrosion rate of the Zn/AgP (0.30 wt.% Agsurf) coatings was on the order of tenths of microns per year and the amount of zinc mass dissolving per day was in the range of 0.15 to 0.7 mg cm&minus 2. Additionally, the surface of the coatings was analysed by X-ray diffraction (XRD) after 40 days of immersion. These results showed the formation of ZnO, as the main corrosion product, in the samples immersed in Hank&rsquo s and Ringer&rsquo s solutions. In the samples immersed in PBS, the formation of a passivating film of Zn2(PO4)3· 2H2O was detected. |
| Databáze: | OpenAIRE |
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