Block copolymers for corrosion protection of aluminium |
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Affiliation: | 1. Laboratoire Chimie Provence (UMR 6264), Équipe « Électrochimie des matériaux », Centre Saint-Jérôme, avenue Escadrille-Normandie-Niemen, 13397 Marseille cedex 20, France;2. Laboratoire Chimie Provence (UMR 6264), Équipe « Chimie radicalaire, organique et polymères de spécialité », Centre Saint-Jérôme, avenue Escadrille-Normandie-Niemen, 13397 Marseille cedex 20, France |
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Abstract: | In this work, poly(n-butyl acrylate-b-trifluoroethyl methacrylate) (PBA-b-PTFEMA) and poly(n-butyl acrylate-b-heptadecafluorodecyl methacrylate) (PBA-b-PHFEMA) diblock copolymers synthesized by controlled radical polymerisation are used as a monolayer to protect aluminium against corrosion.Contact angle measurements show hydrophobic behaviour that can be attributed to the presence of a fluorinated block. The preferential orientation of the fluorinated block at the coating/air interface can explain the high hydrophobicity behaviour. Finally, corrosion resistance has been investigated by Electrochemical Impedance Spectroscopy (EIS). The results show that the PBA-b-PHFEMA copolymer provides excellent anti-corrosion barrier properties, even after 60 days of immersion in a solution of 3% NaCl. |
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