An alternative approach was developed for the surface treatment of as-received commercial aluminium alloys 6082-T6, 5083-H111 and 2024-T3 by using a pyrrole-based silane. One immersion step is sufficient for poly(pyrrole-siloxane) film deposition, with good adhesion and desirable morphological features. The combination in a single coating of polysiloxane linkages, acting as a barrier for aggressive species penetration towards the metal surface, and polypyrrole units manifesting active anodic protection, together with high degree of compactness, explains the significantly improved corrosion protection of the composite film in comparison to simple coatings of polymethylsiloxane and polypyrrole.

Characterization and corrosion performance of poly(pyrrole-siloxane) films on commercial Al alloys / S.P. Trasatti, M. Trueba. - In: JOURNAL OF APPLIED ELECTROCHEMISTRY. - ISSN 0021-891X. - 39:11(2009 Nov), pp. 2061-2072. ((Intervento presentato al convegno GEI-ERA Conference tenutosi a Genova nel 2008.

Characterization and corrosion performance of poly(pyrrole-siloxane) films on commercial Al alloys

S.P. Trasatti
Primo
;
M. Trueba
Ultimo
2009

Abstract

An alternative approach was developed for the surface treatment of as-received commercial aluminium alloys 6082-T6, 5083-H111 and 2024-T3 by using a pyrrole-based silane. One immersion step is sufficient for poly(pyrrole-siloxane) film deposition, with good adhesion and desirable morphological features. The combination in a single coating of polysiloxane linkages, acting as a barrier for aggressive species penetration towards the metal surface, and polypyrrole units manifesting active anodic protection, together with high degree of compactness, explains the significantly improved corrosion protection of the composite film in comparison to simple coatings of polymethylsiloxane and polypyrrole.
Al alloys; Polysiloxane-based coatings; Polypyrrole; Reflectionabsorption infrared spectroscopy; Corrosion protection
Settore ING-IND/23 - Chimica Fisica Applicata
Settore CHIM/02 - Chimica Fisica
10.1007/s10800-009-9913-3
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/258002
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