Influence of inhibitor addition on the corrosion protection performance of sol–gel coatings on AA2024

Yasakau, K.A.; Zheludkevich, Mikhail L.; Karavai, O.V.; Ferreira, M.G.S.

doi:10.1016/j.porgcoat.2007.12.002

Cited by 188 publications

(101 citation statements)

References 33 publications

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“…In order to obtain self-healing properties, the coatings are doped with corrosion inhibitors. Lanthanides ions, benzotriazoles, 8-hydroxyquinoline, propargyl alcohol or red mud (waste from the production of aluminium by the Bayer method, consisting of iron and titanium oxides and silicon compounds) is commonly used for this purpose [85,[93][94][95][96][97]. Also, hybrid coatings are produced [82,85,91,92,[98][99][100].…”

Section: Hybrid Oxide Coatingsmentioning

confidence: 99%

“…Benzotriazole is adsorbed on the metal surface and acts as an anodic inhibitor [94]. Contrary to [94], some authors report that the presence of BTA in the sol-gel coating negatively affects the barrier properties of sol-gel films and does not provide adequate corrosion protection [97]. Propargyl alcohol can positively influence the barrier properties of the coating [95].…”

Section: Hybrid Oxide Coatingsmentioning

confidence: 99%

“…MBT and MBI form a thin adsorption layer on the damaged metallic surface [99]. 8HQ as a cathodic inhibitor for aluminium, in neutral chloride solution, forms poorly soluble chelate complexes with aluminium [97]. An effective solution eliminating the reported adverse effect of an inhibitor addition on the quality of the coating consists of applying first a porous layer of TiO 2 (made up of rutile and anatase phases) directly to the substrate surface.…”

Section: Hybrid Oxide Coatingsmentioning

confidence: 99%

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Self-healing coatings in anti-corrosion applications

2013

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Nonmetallic (based on polymers or oxides) and metallic protective coatings are used to protect metal products against the harmful action of the corrosion environment. In recent years, self-healing coatings have been the subject of increasing interest. The ability of such coatings to self-repair local damage caused by external factors is a major factor contributing to their attractiveness. Polymer layers, silica-organic layers, conversion layers, metallic layers and ceramic layers, to mention but a few, are used as self-healing coatings. This paper presents the main kinds of self-healing coatings and explains their selfhealing mechanisms.

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Section: Hybrid Oxide Coatingsmentioning

confidence: 99%

Section: Hybrid Oxide Coatingsmentioning

confidence: 99%

Section: Hybrid Oxide Coatingsmentioning

confidence: 99%

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Self-healing coatings in anti-corrosion applications

2013

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“…Another challenging aspect associated with sol-gel coatings is the lack of active corrosion protection. To overcome this limitation different types of corrosion inhibitors have been incorporated into sol-gel coatings with the aim to confer active protection [5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

“…Some corrosion inhibitors may cause a decrease in adhesion and coating barrier properties as a result of unwanted, detrimental interactions between these active species and polymeric matrix [5,8,9]. To prevent the contact between inhibitors and coating matrix, micro and nanostructured containers have been proposed in the literature.…”

Section: Introductionmentioning

confidence: 99%

Corrosion protection of AA2024 by sol–gel coatings modified with MBT-loaded polyurea microcapsules

Maia

Yasakau

Carneiro

et al. 2016

Chemical Engineering Journal

Self Cite

109

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In this work we report the synthesis of polyurea microcapsules loaded with corrosion inhibitor 2-mercaptobenzothiazole (MBT) for corrosion protection of 2024 aluminum alloy. The microcapsules were prepared by interfacial polycondensation. The resulting capsules exhibit spherical shape, with diameter ranging between 100 nm and 2 µm. The loading content of MBT was found to be 5 wt% and release studies showed that MBT is preferentially released under acidic and alkaline conditions and follows the Fickian diffusion model. This pH dependency seems suitable for protection of metallic alloys where corrosion processes are accompanied by local pH changes. Furthermore, the microcapsules were added to a hybrid sol-gel coating and its performance assessed by electrochemical and accelerated standard tests. The results obtained indicate that capsules loaded with MBT do not affect negatively the barrier properties of sol-gel coatings, and contribute for the enhancement of adhesion of coatings to the metallic substrate. More relevant, these additives impart active corrosion protection suppressing corrosion activity at defect sites, which opens prospects for application of polyurea microcapsules as additives for high-performance coatings.

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Deposition of Environmentally Compliant Cerium‐Containing Coatings and Primers on Copper‐Containing Aluminium Aircraft Alloys

Kozhukharov

2016

Biobased and Environmental Benign Coatings

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Influence of inhibitor addition on the corrosion protection performance of sol–gel coatings on AA2024

Cited by 188 publications

References 33 publications

Self-healing coatings in anti-corrosion applications

Self-healing coatings in anti-corrosion applications

Corrosion protection of AA2024 by sol–gel coatings modified with MBT-loaded polyurea microcapsules

Deposition of Environmentally Compliant Cerium‐Containing Coatings and Primers on Copper‐Containing Aluminium Aircraft Alloys

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