Study of the air-formed oxide layer at the copper surface and its impact on the copper corrosion in an aggressive chloride medium

Touzé, Ewen; Cougnon, Charles

doi:10.1016/j.electacta.2017.12.187

Cited by 35 publications

(19 citation statements)

References 21 publications

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“…Our goal was to design the superhydrophobic coatings on the surface of mild copper alloys with high resistance to impacts of the chemically aggressive medium, including the corrosive halide solutions, and to abrasive loads. As mentioned above, the textured surface with the elements of texture constituted by oxides on the copper surface not only provides the barrier for corrosion but also supplies additional advantages for industrial applications of such alloys. The hardness value of a bare mild copper alloy (M1M), according to the manufacturer data, is around 45–55 MPa, while it was shown in the literature that hardness for CuO and Cu 2 O varies between 2050–2490 and 2010–2030 MPa, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…In general, copper is characterized by an appropriate corrosion resistance in the atmosphere and in some of the chemical environments due to the formation of a protective oxide film or nonconductive layer of corrosion products on its surface . Copper is prone to readily oxidize at room temperature; however, the natural oxide layer is typically thin.…”

Section: Introductionmentioning

confidence: 99%

“…Copper is prone to readily oxidize at room temperature; however, the natural oxide layer is typically thin. Depending on the environmental conditions, the pitting corrosion may occur on the copper surface in the presence of oxygen or some aggressive anions such as chloride ions . This can compromise using bare copper and its alloys in technology because corrosion of copper impacts its performance in industrial and technological applications.…”

Section: Introductionmentioning

confidence: 99%

“…In many cases, such as high temperature or anodic oxidation, the dual oxide phase formation takes place, with CuO occupying the outer and Cu 2 O the inner layers . Such complex oxide layer has been found to be useful in improving the corrosion resistance of copper in NaCl solutions, while the formation of a compact thick film of CuO on Cu surface prevents anodic corrosion . The superhydrophobic films on metal surfaces essentially inhibit the electrochemical corrosion processes due to several protection mechanisms, such as electrolyte repellency, suppression of adsorption of aggressive ions onto the surface, barrier effect of the modified textured surface layer, and specific charging of a hydrophobic surface in electrolytes .…”

Section: Introductionmentioning

confidence: 99%

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Pulsed Laser Induced Triple Layer Copper Oxide Structure for Durable Polyfunctionality of Superhydrophobic Coatings

Бойнович

Emelyanenko

Domantovsky

et al. 2018

Adv Materials Inter

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anions such as chloride ions. [1,2,[4][5][6][7] This can compromise using bare copper and its alloys in technology because corrosion of copper impacts its performance in industrial and technological applications.Several ways for enhancing the corrosion protection were discussed in the literature, including the formation of thick oxide films [3,8,9] and the formation of a superhydrophobic layer atop of bulk copper. [10][11][12][13][14][15][16][17][18][19] As for oxide films on copper and copper alloys, typically the ionic state of copper can be either monovalent or divalent, associated with the formation of cuprous oxide Cu 2 O or cupric oxide CuO, respectively. In many cases, such as high temperature or anodic oxidation, the dual oxide phase formation takes place, with CuO occupying the outer and Cu 2 O the inner layers. [8,9,20,21] Such complex oxide layer has been found to be useful in improving the corrosion resistance of copper in NaCl solutions, [1,2,8,22] while the formation of a compact thick film of CuO on Cu surface prevents anodic corrosion. [23] The superhydrophobic films on metal surfaces essentially inhibit the electrochemical corrosion processes due to several protection mechanisms, such as electrolyte repellency, suppression of adsorption of aggressive ions onto the surface, barrier effect of the modified textured surface layer, and specific charging of a hydrophobic surface in electrolytes. [24,25] At the same time, for the majority of designed superhydrophobic coatings, a poor abrasive resistance restricts the practical application of these coatings. However, it was shown recently [26] that a strategy, combining the laser chemical modification of metal's surface layer and laser texturing, followed by chemisorption of low energy compounds, can be effectively used to control the mechanical and chemical properties of a superhydrophobic layer on aluminum substrate.In this study, we will demonstrate that the coatings with enhanced protective properties based on multibarrier principle can be designed on copper using the above strategy. We will show that nanosecond laser treatment in an oxygen atmosphere under appropriate laser texturing regimes followed by chemisorption of fluorooxysilane allows obtaining a thick layer of cupric oxide CuO with crystalline micro-and nanotexture and superhydrophobic properties. Triple layer copper oxide structure designed in that way allows solving the problem of durable polyfunctionality of superhydrophobic coatings. We will present Copper and its alloys are among the most used metals for the industry. However, using bare copper and its alloys in technology is compromised because corrosion and poor abrasion resistance of copper impacts its performance in industrial and technological applications. In this paper, a strategy based on combining the laser chemical modification of metal's surface in a controlled atmosphere and laser texturing, followed by chemisorption of low energy compounds is effectively used for fabrication of a superhydrophobic coating with enhanced prot...

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Pulsed Laser Induced Triple Layer Copper Oxide Structure for Durable Polyfunctionality of Superhydrophobic Coatings

Бойнович

Emelyanenko

Domantovsky

et al. 2018

Adv Materials Inter

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show abstract

“…as solar cells [4][5][6]. However, in most of applications copper must have stable, oxide-free surface, which is not easy to achieve in practice [3].…”

Section: Introductionmentioning

confidence: 99%

“Mechanically prepared copper surface in oxidizing and non-oxidizing conditions”

Serafin

Nowak

Wierzba

2019

Applied Surface Science

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In the present work surface roughness of copper samples after mechanical surface preparation processes (polishing, grinding, sand-blasting) and after exposure in non-oxidizing (high purity argon) and oxidizing (air) conditions at 700 and 750°C have been evaluated by contact profilometer and by fractal analysis. Quantitative description of surfaces that are hidden from the sight of conventional methods is possible by fractal analysis, e.g. in the present work, the roughness of Cu 2 O/Cu boundary has been evaluated under oxide layer. It has been pointed out, that in both oxidizing and non-oxidizing conditions initial surface roughness of copper is affected by annealing at high temperature: at 700°C surface roughness of polished and ground samples increased but at 750°C decreased in comparison to surface roughness prior to heat treatment. For sand-blasted samples in both oxidizing and non-oxidizing conditions the lowest values of surface roughness parameters were obtained at 750°C. It is then concluded that two phenomena are responsible for such effect: chemical reaction between copper and oxygen and surface diffusion of copper due to high temperature of annealing.

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Galvanic Transformation Dynamics in Heterostructured Nanoparticles

et al. 2021

Adv Funct Materials

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Corrosion is a significant problem for the stability of structural metals and potentially for functional nanomaterials in operating environments. When two metals with different electrochemical potentials form a junction, galvanic corrosion occurs, resulting in the sacrificial dissolution of the metal with a higher oxidation potential (lower electrode potential). Here, it is shown that bimetallic hetero-nanostructures composed of phase-segregated metals undergo galvanic corrosion in aqueous environments. Such selective etching of the sacrificial metal in heterojunction particles leads to the formation of unusual and kinetically stabilized half-spheroid particles. By using a fluid cell and in situ scanning transmission electron microscopy, a two-stage corrosion process can be observed where the Cu experiences a fractal breakdown before the Ag corrodes due to the lack of a protective oxide layer. However, when treated with a mild Ar plasma, the stability of these structures against corrosion is enhanced due to the conversion of the amorphous native oxide to a denser, thin layer of CuO on the Cu surface. Taken together, this work highlights the importance of considering the effects of galvanic corrosion on the stability of multicomponent nanoparticles, and it shows how mass transport in a nanoscale system is influenced by redox processes.

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Study of the air-formed oxide layer at the copper surface and its impact on the copper corrosion in an aggressive chloride medium

Cited by 35 publications

References 21 publications

Pulsed Laser Induced Triple Layer Copper Oxide Structure for Durable Polyfunctionality of Superhydrophobic Coatings

Pulsed Laser Induced Triple Layer Copper Oxide Structure for Durable Polyfunctionality of Superhydrophobic Coatings

“Mechanically prepared copper surface in oxidizing and non-oxidizing conditions”

Galvanic Transformation Dynamics in Heterostructured Nanoparticles

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