Antimicrobial properties dependence on the composition and architecture of copper-alumina coatings prepared by plasma electrolytic oxidation (PEO)

Santos, Janaína S.; Márquez, Victor; Buijnsters, Josephus Gerardus; Praserthdam, Supareak; Praserthdam, Piyasan

doi:10.1016/j.apsusc.2022.155072

Cited by 14 publications

(2 citation statements)

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“…Regarding the Aluminum PEO, reports in the literature have described the incorporation of particles into the oxide coating from the electrolyte to enhance their corrosion resistance, wear, and tribological properties [12][13][14][15], catalytic activity [16][17][18], magnetic properties [19,20], and antimicrobial properties [21][22][23][24][25][26]. Studies that focus on improving the corrosion resistance and tribological properties reported the use of carbon-based additives [12,13] and α-Al 2 O 3 [14], and ZrO 2 [15] powders in the electrolyte.…”

Section: Introductionmentioning

confidence: 99%

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Anodization Time Effect on Silver Particles Deposition on Anodic Oxide Coating over Al Produced by Plasma Electrolytic Oxidation

Trivinho‐Strixino

Delgado-Silva

Santos

et al. 2023

Plasma

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In this study, 6061 Al alloy was galvanostatically anodized under the Plasma Electrolytic Oxidation (PEO) condition. A factorial design of 22 was carried out using two variables (anodization time and presence of silver in the electrolyte) on two levels, i.e., 20 and 60 min of anodization and the absence/presence of silver ions in the electrolyte. The Al anodization was performed in sodium silicate electrolyte, applying a constant current density of 20 mA cm−2. The oxide characterization was performed by Scanning Electron Microscopy (SEM), surface roughness analysis (RMS), Energy Dispersive Spectroscopy (EDS), Rutherford Backscattered Spectroscopy (RBS), and Grazing Incidence X-ray Diffraction (GIXRD). The SEM micrographs revealed an irregular porous structure with cracks on the oxide surface composed of a thin crystalline layer of γ-Al2O3 over the Al substrate. From EDS and RBS analysis, it was possible to identify the elements Al, O, Si, Ag, and Na, demonstrating that a shorter anodization time (20 min) led to a significant amount of silver deposits on the outer layer of the oxide coating, mainly deposited in the surroundings of the pores. Conversely, the silver content on the PEO film anodized for 60 min was meager. These results demonstrated that the anodization time was the critical control variable for the amount of silver deposited over the oxide film. The shorter the anodizing time, the higher the silver content on the PEO coating.

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Section: Introductionmentioning

confidence: 99%

“…On the other hand, Fe species were incorporated from the electrolyte to provide a magnetic property to the PEO oxide coatings [19,20]. For improving antibacterial and antifouling properties, silver [22][23][24][25] and copper [21,22,26] were explored as additives of alumina PEO coatings produced in silicate media.…”

Section: Introductionmentioning

confidence: 99%