Anti-corrosion coating for metal surfaces based on superhydrophobic electrosprayed carbon layers

Conde, Julio J.; Ferreira-Aparicio, Paloma; Chaparro, Antonio M.

doi:10.1016/j.apmt.2018.08.001

Cited by 30 publications

(13 citation statements)

References 20 publications

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“…The electrolyte (H 2 SO 4 0.5M) was deaerated by bubbling N 2 for 30 minutes before measurements, and cell blanking was performed with the same gas during measurements. A thorough analysis of electrosprayed film protection ability will be discussed in a separate publication .…”

Section: Methodsmentioning

confidence: 99%

Understanding the Behavior of Electrosprayed Carbon Black‐Nafion Composite Layers

2018

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Electrosprayed composite films prepared from carbon and Nafion are especially suitable to be applied as microporous layers and protective coatings for a number of for proton exchange membrane fuel cell (PEMFC) components, due to of their particular properties. The electrospray deposition of carbon inks is a complex process that requires further study. In order to gain insight into the factors influencing the characteristics of electrosprayed films, the effect of some parameters has been analyzed. The solvent nature, the Nafion to carbon ratio in the ink, the ionization voltage (positive or negative) and the polymer distribution on the carbon surface are some of the studied variables. Surface characterization of these layers by techniques, such as XPS, SEM or thermal decomposition has provided very useful information about the structure of the layers and the interaction between their components. The results show that electrospray ionization induces a strong adsorption of the sulfonic groups of the ionomer on the carbon black surface, which is probably responsible for the high stability and durability of the layers and their superhydrophobic character. To our knowledge, this is the first study devoted to the analysis of the particular carbon‐Nafion interactions in electrosprayed films.

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Section: Methodsmentioning

confidence: 99%

Understanding the Behavior of Electrosprayed Carbon Black‐Nafion Composite Layers

2018

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“…In addition, airborne sea spray and storms cause the diffusion of Cl À inside cement pores or bound to the cement hydrate chemically or physically along the path of diffusion. [20][21][22] The free Cl À ions may diffuse into the steel (pin) and fracture the passive lm, resulting in accelerated corrosion in the steel (pin)-cement interface. The loss of electrons on the steel (pin) surface rises due to corrosion.…”

Section: Proposed Mechanism For Crack Resistance At the Steelcement I...mentioning

confidence: 99%

Crack resistance of a noble green hydrophobic antimicrobial sealing coating film against environmental corrosion applied on the steel–cement interface for power insulators

et al. 2022

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“…Materials with a water wetting angle above 150 • , with a droplet roll-off angle below 10 • , and a pronounced surface self-cleaning capability, are classified as superhydrophobic [1][2][3][4]. Superhydrophobicity underlies the self-cleaning of surfaces in some plants and insects [3][4][5][6][7] and is often required in the formation of anti-corrosion, anti-fouling, and anti-icing coatings [8][9][10][11][12][13][14][15][16][17][18][19] as well as for the production of pollution-resistant textile materials [20].…”

Section: Introductionmentioning

confidence: 99%

Regularities of the Formation of a Green Superhydrophobic Protective Coating on an Aluminum Alloy after Surface Modification with Stearic Acid Solutions

Abrashov

Grigoryan

Korshak

et al. 2021

Metals

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It has been shown that solutions of stearic acid in a dimethyl sulfoxide–water binary mixture allow superhydrophobic protective coatings to be created on an aluminum alloy surface with a minimum impact on the environment. The superhydrophobicity and self-cleaning ability of the coating that we developed have been confirmed by measurements of droplet wetting angles and roll-off angles. These properties appear due to the formation of a multimodal micro-rough surface that mainly consists of aluminum stearate. The coatings formed in this manner have been studied by ellipsometry, XPS, and scanning probe microscopy. Their protective ability has been estimated by the “droplet-express” method and in a salt fog chamber. The protective ability of the coating is determined by the DMSO/H2O ratio, the concentration of stearic acid, and the duration and temperature of modification of the aluminum alloy; it is controlled by a competition between the processes of aluminum stearate formation and hydrolysis. It has been shown that adsorption of stearic acid on an aluminum stearate coating increases its permeability and decreases its protective capability. The results presented in this article are useful for optimizing the conditions of applying green superhydrophobic stearate coatings on aluminum alloys in order to achieve a maximum protective effect.

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Anti-corrosion coating for metal surfaces based on superhydrophobic electrosprayed carbon layers

Cited by 30 publications

References 20 publications

Understanding the Behavior of Electrosprayed Carbon Black‐Nafion Composite Layers

Understanding the Behavior of Electrosprayed Carbon Black‐Nafion Composite Layers

Crack resistance of a noble green hydrophobic antimicrobial sealing coating film against environmental corrosion applied on the steel–cement interface for power insulators

Regularities of the Formation of a Green Superhydrophobic Protective Coating on an Aluminum Alloy after Surface Modification with Stearic Acid Solutions

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