Adhesion promotion and corrosion resistance of mixed phosphonic acid monolayers on AA 2024

Ruhm, Lukas; Löseke, Jannik; Vieth, Pascal; Prüßner, Tim; Grundmeier, Guido

doi:10.1016/j.apsusc.2024.160655

Applied Surface Science

2024

DOI: 10.1016/j.apsusc.2024.160655

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Adhesion promotion and corrosion resistance of mixed phosphonic acid monolayers on AA 2024

Lukas Ruhm,

Jannik Löseke,

Pascal Vieth

et al.

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2024

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Phosphonic Acids as Corrosion Inhibitors and Adhesion Promoters for Organic Coatings and Bronze

Mikić,

Radovanović-Perić,

Otmačić Ćurković

2024

Materials

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Currently used organic coatings for the protection of bronze sculptures have a relatively short lifespan as a consequence of strict requirements of conservation ethics, which limit the selection of coatings. For that reason, enhancement of the corrosion protection level and durability of appropriate coatings is needed. The aim of this work was to examine if corrosion protection of bronze by selected acrylic and polyurethane coatings could be improved by using two phosphonic acids, 16-phosphonohexadecanoic acid (COOH-PA) and 12-aminododecylphosphonic acid (NH2-PA). Electrochemical measurements (linear polarization and electrochemical impedance spectroscopy, EIS) were performed to gain an insight into the influence of these phosphonic acids on the performance of the coatings during a two-week exposure to artificial acid rain and a three-month outdoor exposure. Besides the influence on the corrosion protection level, the influence on the coating adhesion was examined as well. A pull-off test clearly confirmed that the studied phosphonic acids act as adhesion promoters of both polyurethane and acrylic coatings, while electrochemical studies revealed improvements in corrosion protection levels, especially in the case of the acrylic coating Paraloid B72.

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Phosphonic Acids as Corrosion Inhibitors and Adhesion Promoters for Organic Coatings and Bronze

Mikić,

Radovanović-Perić,

Otmačić Ćurković

2024

Materials

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Adhesion promotion and corrosion resistance of mixed phosphonic acid monolayers on AA 2024

Cited by 1 publication

References 41 publications

Phosphonic Acids as Corrosion Inhibitors and Adhesion Promoters for Organic Coatings and Bronze

Phosphonic Acids as Corrosion Inhibitors and Adhesion Promoters for Organic Coatings and Bronze

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