Plasma electrolytic oxidation coatings with fungicidal properties

Pezzato, Luca; Cerchier, Pietrogiovanni; Brunelli, Katya; Bartolozzi, Alessandra; Bertani, Roberta; Dabalà, Manuele

doi:10.1080/02670844.2018.1441659

Cited by 31 publications

(18 citation statements)

References 23 publications

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“…Actually, in the plots, the points represent the experimental data and the lines, the result of the fitting. In detail, for the untreated sample, a simple circuit with one parallel R‐CPE (Figure a) was used in order to simulate the presence and the corrosion behavior of only the natural oxide layer, instead for PEO coatings, the more complex circuit with two parallel R‐CPE (Figure b) was used in order to simulate the typical double‐layer structure of PEO coatings with the presence of an inner layer and an external porous layer that could be functionalized, for example, with particles addition . The inner layer is in this case very thin and not clearly observable in the SEM images of the cross‐section but is always present in PEO coatings and is the zone near the substrate where there is a reduction in the porosity.…”

Section: Resultsmentioning

confidence: 99%

Corrosion and mechanical properties of plasma electrolytic oxidation‐coated AZ80 magnesium alloy

Pezzato

Coelho

Bertolini

et al. 2019

Materials & Corrosion

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Plasma electrolytic oxidation (PEO) coatings were produced on AZ80 magnesium alloy in a solution containing silicates and phosphates and working at high current densities with short treatment times. The effect of a sealing treatment in boiling water on corrosion and mechanical properties of the coatings were investigated. Moreover, the corrosion mechanism of the samples with and without the sealing treatment was evaluated. The microstructure of the coatings was characterized with scanning electron microscope observation and X‐ray diffraction analysis. The mechanical properties were evaluated with nanoindentation tests and the corrosion resistance was studied by potentiodynamic polarization, electrochemical impedance spectroscopy, and scanning vibrating electrode technique. The results showed that the sealing did not influence the microstructure and the mechanical properties of the samples and instead produced a remarkable increase in the corrosion resistance. The crevice corrosion, present in the sample without the sealing, was avoided with the treatment in boiling water.

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Section: Resultsmentioning

confidence: 99%

Corrosion and mechanical properties of plasma electrolytic oxidation‐coated AZ80 magnesium alloy

Pezzato

Coelho

Bertolini

et al. 2019

Materials & Corrosion

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“…The antiviral activity of other metal spray techniques has also been reported by Champagne et al (2019). Moreover, a relative new method for surface treatment is the plasma electrolytic oxidation (PEO), a procedure that among its advantages is the possibility to incorporate into the coating the particles suspended in the electrolyte, such as oxides, which also represents a promising technique to provide antiviral coating surfaces (Pezzato et al, 2019).…”

Section: Surface and Coating Technologiesmentioning

confidence: 89%

Trends in the Antiviral Chemical Activity of Material Surfaces Associated With the SARS-CoV-2 Outbreak

et al. 2021

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The novel coronavirus designated as SARS-CoV-2 has risen the first pandemic caused by coronavirus and by November 26, 2020 is responsible for more than 1,410 million deaths. This scenario evidences that despite previous pandemics and epidemics in the world’s history, the current worldwide measures to contain and to mitigate viruses’ outbreaks are still disabled and insufficient. Therefore, this perspective reinforces the need for new and practical approaches for antiviral material developments and presents current technologies and its advances in this field of research focusing especially in surface materials since it is one of the most common interaction pathways. Furthermore, the roll that nanotechnology has been playing in the combat of viruses as well as the mechanisms that science has been discovering to inactivate these pathogenic microorganisms is presented. Finally, we suggest introducing new legislation and norms rather more specified on virucidal agents (materials and devices) than bactericidal ones in human environments such as hospitals, nursing homes, buses, and shopping centers to mitigate the current and future virus-based pandemics and epidemics.

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“…Among the different surface treatments, electrochemical methods are one of the more diffused and among these, Plasma electrolytic oxidation (PEO), also called “Microarc Oxidation (MAO)”, is attracting increasing interest due to the capacity to produce oxide ceramic coatings on light alloys such as Al, Ti and Mg [ 14 , 15 ]. PEO treatment, generally, enhances corrosion- and wear-resistance properties, and can also produce a proper functionalization of the surface [ 16 , 17 ]. PEO is similar to conventional anodizing but is usually carried out in high-voltage condition which is introduced into the high-pressure discharge area from the Faraday region of traditional anodizing.…”

Section: Introductionmentioning

confidence: 99%

Microstructural and Corrosion Properties of Hydroxyapatite Containing PEO Coating Produced on AZ31 Mg Alloy

et al. 2021

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In this work, the composition of an electrolyte was selected and optimized to induce the formation of hydroxyapatite during Plasma electrolytic oxidation (PEO) treatment on an AZ31 alloy for application in bioabsorbable implants. In detail, the PEO process, called PEO-BIO (Plasma Electrolytic Oxidation-Biocompatible), was performed using a silicate-phosphate-based electrolyte with the addition of calcium oxide in direct-current mode using high current densities and short treatment times. For comparison, a known PEO process for producing anticorrosive coatings, called standard, was applied on the same alloy. The coatings were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD) and XPS analyses. The corrosion performance was evaluated in simulated body fluid (SBF) at 37 °C. The coating produced on the PEO-BIO sample was porous and thicker than the standard PEO one, with zones enriched in Ca and P. The XRD analysis showed the formation of hydroxyapatite and calcium oxides in addition to magnesium-silicon oxide and magnesium oxide in the PEO-BIO sample. The corrosion resistance of PEO-BIO sample was comparable with that of a traditional PEO treated sample, and higher than that of the untreated alloy.

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Plasma electrolytic oxidation coatings with fungicidal properties

Cited by 31 publications

References 23 publications

Corrosion and mechanical properties of plasma electrolytic oxidation‐coated AZ80 magnesium alloy

Corrosion and mechanical properties of plasma electrolytic oxidation‐coated AZ80 magnesium alloy

Trends in the Antiviral Chemical Activity of Material Surfaces Associated With the SARS-CoV-2 Outbreak

Microstructural and Corrosion Properties of Hydroxyapatite Containing PEO Coating Produced on AZ31 Mg Alloy

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