The interplay between atmospheric corrosion and antimicrobial efficiency of Cu and Cu5Zn5Al1Sn during simulated high-touch conditions

Chang, Tingru; Butina, Karen; Herting, Gunilla; Rajarao, Gunaratna Kuttuva; Richter‐Dahlfors, Agneta; Blomberg, Eva; Wallinder, Inger Odnevall; Leygraf, Christofer

doi:10.1016/j.corsci.2021.109433

Cited by 15 publications

(30 citation statements)

References 86 publications

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“…Meanwhile, exclusive formation of Cu 2 O could be a challenge, just like the formation of NiO on the Low Cu HT shown in this study. One could also imagine as more/different alloying elements are included, undesirable by-products could form during oxidation process [42], undermining the coverage of antibacterial Cu 2 O or even suppressing its formation. Extensive investigation is thus needed in the selection of alloy composition in each applying scenario, even though coexistence of oxides might be inevitable subject to the oxygen affinity.…”

Section: Discussion On This Promising Strategy and Practical Insightsmentioning

confidence: 99%

“…As a result, specifying the environmental factors in the evaluations will ensure much applicable implication and persuasive conclusion. Given that the outermost surface will be oxidised on purpose, the deterioration induced by atmospheric corrosion might not be as troublesome as that on the metallic copper surfaces [10,42], but it could still be worthwhile tracking the stability of the oxidised surface, e.g. together with daily disinfection events [51].…”

Section: Discussion On This Promising Strategy and Practical Insightsmentioning

confidence: 99%

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Tailor the antibacterial efficiency of copper alloys by oxidation: when to and when not to

et al. 2022

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Copper and its relevant species, such as oxides and many alloys, have been recognised as potential antibacterial surfaces. Despite the relatively low antibacterial efficacy of cuprous oxide (Cu2O) compared to pure copper, it is still worth consideration in some scenarios. Taking copper-nickel co-sputtered thin films with two copper contents (55 and 92 at.%) as examples, this work investigated the potential of oxidation in altering the antibacterial behaviour of copper alloy surfaces. By heat treatment at 200–250 °C for 20–24 h, a layer mainly composed of Cu2O was successfully fabricated on the top of the Cu-Ni alloys. Antibacterial efficiency against Escherichia coli in 1 h was obtained by the droplet method and further compared. The coupons with 92 at.% copper became less effective after oxidation: the reduction rate declines from 97.0 to 74.3%; whereas the coupons with 55 at.% copper showed a large increase after oxidation, rising from 15.0 to 66.8%. The experiments described herein reveal a promising concept of oxidation in enhancing the less effective copper alloy surfaces for antibacterial applications. Graphical abstract

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Section: Discussion On This Promising Strategy and Practical Insightsmentioning

confidence: 99%

Section: Discussion On This Promising Strategy and Practical Insightsmentioning

confidence: 99%

Tailor the antibacterial efficiency of copper alloys by oxidation: when to and when not to

et al. 2022

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“…Phosph ate-buffered saline (PBS) purchased from VWR Life Science AMRESCO (Radnor, PA, USA) was used as a dispersion medium. This choice of dispersion medium is related to the recently detected significant effect of the nutrient dispersion medium on the corrosion activity of metallic surfaces immersed in bacterial dispersion, which in turn modulates the antibacterial properties [22,23]. Using PBS, which does not contain protein nutrients, precludes the disturbing influence of protein nutrients on the antibacterial efficiency of magnesium substrates.…”

Section: Analysis Of Bactericidal Properties Of the Superhydrophobic Magnesium Substratesmentioning

confidence: 99%

Antimicrobial Activity and Degradation of Superhydrophobic Magnesium Substrates in Bacterial Media

Emelyanenko

Kaminsky

Пыцкий

et al. 2021

Metals

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The interest in magnesium-based materials is promoted by their biocompatibility, their bioresorbability, and their recently discovered antibacterial potential. Until now, the widespread use of magnesium alloys in different corrosive environments was inhibited by their weakly controllable degradation rate and poorly understood microbiologically induced corrosion behavior. To better understand the degradation and usability of magnesium-based alloys, in this study we have fabricated superhydrophobic coatings on a magnesium-based alloy, and analyzed the behavior of this alloy in bacterial dispersions of Pseudomonas aeruginosa and Klebsiella pneumoniae cells in phosphate-buffered saline. It was shown that the immersion of such coatings in bacterial dispersions causes notable changes in the morphology of the samples, dependent on the bacterial dispersion composition and the type of bacterial strain. The interaction of the superhydrophobic coatings with the bacterial dispersion caused the formation of biofilms and sodium polyphosphate films, which provided enhanced barrier properties in magnesium dissolution and hence in dispersion medium alkalization, eventually leading to the inhibition of magnesium substrate degradation. The electrochemical data obtained for superhydrophobic samples in continuous contact with corrosive bacterial dispersions for 48 h indicated a high level of anticorrosion protection.

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“…Recently, copper and copper alloys have attracted increased attention due to their pronounced antibacterial activity against many germs [ 5 , 6 , 7 , 8 , 9 , 10 , 11 ]. Van Doremalen et al reported [ 12 ] that copper surfaces are the most effective in the suppression of the SARS-CoV-2 and SARS-CoV-1 coronaviruses activity with a destruction time of 4 h. For comparison, they remained active on plastic and stainless-steel surfaces for up to 72 h. It is generally accepted [ 13 ] that the use of copper-based fomites can reduce the number of infections caused by SARS-CoV-2 and other viruses.…”

Section: Introductionmentioning

confidence: 99%

“…Hutasoit et al proposed a cold-spray coating of copper on in-use steel parts to alleviate the tendency of SARS-CoV-2 spreading, with 96% of the virus inactivated within 2 h [ 14 ]. Copper and copper-based coatings can also be effectively used against antibiotic-resistance hospital bacteria, like Escherichia coli ( E. coli ), Bacillus subtilis , and Staphylococcus epidermidis ( S. epidermidis ) [ 11 , 15 ]. However, copper has low wear resistance, quickly tarnishes, and loses its decorative appearance.…”

Section: Introductionmentioning

confidence: 99%

Effect of TiO2 Concentration on Microstructure and Properties of Composite Cu–Sn–TiO2 Coatings Obtained by Electrodeposition

et al. 2021

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In this work, Cu–Sn–TiO2 composite coatings were electrochemically obtained from a sulfate bath containing 0–10 g/L of TiO2 nanoparticles. The effect of TiO2 particles on kinetics of cathodic electrodeposition has been studied by linear sweep voltammetry and chronopotentiometry. As compared to the Cu–Sn alloy, the Cu–Sn–TiO2 composite coatings show rougher surfaces with TiO2 agglomerates embedded in the metal matrix. The highest average amount of included TiO2 is 1.7 wt.%, in the case of the bath containing 5 g/L thereof. Composite coatings showed significantly improved antibacterial properties towards E. coli ATCC 8739 bacteria as compared to the Cu–Sn coatings of the same composition. Such improvement has been connected with the corrosion resistance of the composites studied by linear polarization and electrochemical impedance spectroscopy. In the bacterial media and 3% NaCl solutions, Cu–Sn–TiO2 composite coatings have lower corrosion resistance as compared to Cu–Sn alloys, which is caused by the nonuniformity of the surface.

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The interplay between atmospheric corrosion and antimicrobial efficiency of Cu and Cu5Zn5Al1Sn during simulated high-touch conditions

Cited by 15 publications

References 86 publications

Tailor the antibacterial efficiency of copper alloys by oxidation: when to and when not to

Tailor the antibacterial efficiency of copper alloys by oxidation: when to and when not to

Antimicrobial Activity and Degradation of Superhydrophobic Magnesium Substrates in Bacterial Media

Effect of TiO2 Concentration on Microstructure and Properties of Composite Cu–Sn–TiO2 Coatings Obtained by Electrodeposition

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