Protecting Aluminum from Atmospheric Corrosion via Surface Hydrophobization with Stearic Acid and Trialkoxysilanes

Kuznetsov, Yu. I.; Семилетов, А. М.; Чиркунов, А. А.; Arkhipushkin, I. A.; Kazanskii, L. P.; Andreeva, N. P.

doi:10.1134/s0036024418040155

Cited by 13 publications

(10 citation statements)

References 35 publications

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“…A special superhydrophobic layer is formed on aluminum surface when the trialkoxysilane was applied in combination with stearic acid. This coating protects the aluminum against the atmospheric corrosion [ 155 ].…”

Section: Sam Layers Built From Different Chemicalsmentioning

confidence: 99%

Formation of Self-Assembled Anticorrosion Films on Different Metals

Telegdi

2020

Materials

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The review will first discuss shortly the phenomenon of corrosion and enroll some general possibilities to decrease the rate of this deterioration. The stress will be laid upon the presentation of anticorrosive self-assembled molecular (SAM) layers as well as on the preparation technology that is a simple technique, does not need any special device, and can be applied on different solids (metals or non-metals) alone or in combination. The paper groups the chemicals (mainly amphiphiles) that can develop nanolayers on different pure or oxidized metal surfaces. The history of the self-assembled molecular layer will be discussed from the beginning of the first application up to now. Not only the conditions of the nanofilm preparation as well as their characterization will be discussed, but the methods that can evaluate the corrosion-inhibiting efficiency of the SAM layers under a corrosive environment will be demonstrated as well.

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Section: Sam Layers Built From Different Chemicalsmentioning

confidence: 99%

Formation of Self-Assembled Anticorrosion Films on Different Metals

Telegdi

2020

Materials

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“…The peculiarity of the TAS action is that in the presence of water, a hydrolysable alkoxy group can be converted to an active silanol group (SiOH), which interacts with a hydroxy group on the metal surface to form siloxane (Si-O-Si) and metalsiloxane (Me-O-Si) covalent bonds. As shown over the past decades, this makes it possible to use TAS themselves as CIs, including those with a passivating effect [35][36][37][38][39][40][41][42][43][44]. A. Frignani et al [36] proved that incorporation of an alkyl into TAS molecules can increase the protection of AA 7075 aluminum alloy from corrosion by these compounds and the protection efficiency increases with increasing the chain length, n c = 3<8<18.…”

Section: Dimegin [24-di(1-methoxyethyl)-deuteroporphyrin-ix] Disodiumentioning

confidence: 99%

Progress in the inhibition of metal corrosion and the prospects of its use in the oil and gas industry

Kuznetsov¹,

Чиркунов²,

Семилетов³

2019

Int. J. Corros. Scale Inhib.

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A brief review of the main scientific areas of research and development of efficient corrosion inhibitors of metals (CIs) and their application methods is given. Temporary protection against atmospheric corrosion of steel pipes and equipment for storage (at least one year) or during transportation is often achieved by passivation using aqueous solutions of non-toxic CIs. They efficiently protect not only steel, but also copper or aluminum alloys; therefore, they successfully replace environmentally hazardous passivating solutions, not only nitrite but also chromate ones. Such solutions are often based on salts of higher carboxylic acids, for example, oleic acid or oleoylsarcosine. Temporary protection includes the use of vapor phase CIs, which, in addition to traditional volatile CIs, include the recently proposed so-called chamber CIs. A relatively new and rapidly developing method of temporary protection of metals is the superhydrophobization of their surface, which provides water contact angles θ above 150°. CIs are used in solutions of strong acids that are injected into the reservoir to increase oil production and in H 2 S-containing media in the fight against corrosion and hydrogenation. Examples of CI applications in paint systems, and more precisely in the primer layer, where they are introduced being immobilized in micro or macro containers to prevent the adverse effect of a CI on the coating while maintaining a high efficiency of metal corrosion protection, are considered. To prevent the destruction of high-pressure gas pipelines, it is important to slow down not only steel corrosion, but also its stress corrosion cracking (SCC). The properties of CIs that are necessary for their use in polymer coatings to reduce the accident incidence rate due to SCC on gas pipelines are discussed.

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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%

“…Some materials, including aluminum and its alloys, are subject to oxidation in air that produces an oxide film whose protective properties are sometimes insufficient. Therefore, the creation of continuous superhydrophobic self-cleaning films on the surfaces of aluminum and its alloys could be an in-demand alternative [6,8,[21][22][23] to passivation with solutions of Cr(VI) compounds that manifest considerable toxicity. However, superhydrophobization requires a surface with multimodal roughness to be formed beforehand to enable the transition from the Wenzel state to the Cassie state, followed by modification with agents that reduce surface energy [3,[24][25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

“…However, superhydrophobization requires a surface with multimodal roughness to be formed beforehand to enable the transition from the Wenzel state to the Cassie state, followed by modification with agents that reduce surface energy [3,[24][25][26][27][28]. Anodizing [29,30], chemical vapor deposition [6,8], sol-gel technology [31][32][33], and laser treatment [34,35] are used to impart multimodal roughness onto a surface. Long-chain alkyl and perfluoroalkyl chains are functionalized with a group that allows them to be affixed to the surface and are used as agents with low surface energy.…”

Section: Introductionmentioning

confidence: 99%

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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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Protecting Aluminum from Atmospheric Corrosion via Surface Hydrophobization with Stearic Acid and Trialkoxysilanes

Cited by 13 publications

References 35 publications

Formation of Self-Assembled Anticorrosion Films on Different Metals

Formation of Self-Assembled Anticorrosion Films on Different Metals

Progress in the inhibition of metal corrosion and the prospects of its use in the oil and gas industry

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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