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8-hydroxyquinoline-modified clay incorporated in an epoxy coating for the corrosion protection of carbon steel

Truc, Trinh Anh and Thuy, Thai Thu and Oanh, Vu Ke and Hang, To Thi Xuan and Nguyen, Anh Son and Caussé, Nicolas and Pébère, Nadine 8-hydroxyquinoline-modified clay incorporated in an epoxy coating for the corrosion protection of carbon steel. (2019) Tribology: Materials, Surfaces and Interfaces, 14. 26-33. ISSN 1751-5831

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Official URL: https://doi.org/10.1016/j.surfin.2018.10.007


In the present work, a well-known corrosion inhibitor (8-hydroxyquinoline (8HQ)) was inserted within the montmorillonite platelets (8HQ-MMT) and the modified clay was incorporated (3 wt.%) into a solvent-free epoxy coating which was afterwards deposited on carbon steel substrates. First, the inhibitive action of 8HQ was investigated by electrochemical methods carried out on a bare carbon steel rotating disk electrode in a 0.1 M NaCl solution. Then, electrochemical impedance measurements were performed to assess the effect of the 8HQ-MMT in the epoxy coating for the corrosion protection. The results were compared with a reference sample constituted by the epoxy coating containing an ammonium quaternary salt-modified clay. It was shown that the two coatings presented good barrier properties. Dry and wet adherence measurements revealed an improvement of the adherence when the 8HQ-MMT was incorporated into the coating by comparison with the reference sample. It was concluded that the 8HQ mainly had an effect at the metal/coating interface but its concentration was too low to afford significant corrosion protection of the carbon steel.

Item Type:Article
HAL Id:hal-02353640
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Other partners > Vietnam Academy of Science and Technology - VAST (VIETNAM)
Laboratory name:
Deposited On:07 Nov 2019 12:42

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