The effect of aluminium alloy secondary phases on aniline-based silane

M. TRUEBA; S.P. TRASATTI; D.O. FLAMINI

CORROSION SCIENCE

PERGAMON-ELSEVIER SCIENCE LTD

Lugar: Cambridge, UK; Año: 2012 vol. 63 p. 59 - 70

0010-938X

Commercial wrought Al alloys with high content of intermetallic phases, namely, AA5083-H111, AA2024-T3 and AA7075-T6, were treated with N-(3-trimethoxysilylpropyl) aniline (AnSi) by a simple procedure. Characterization studies and corrosion experiments indicate that the hybrid film protection capacity is related in a complex way to the macromolecular network structure linked to the Al substrate composition. Nevertheless, barrier protection enhanced by a buffer effect and galvanic coupling, as aided by aniline unitswithin the hybrid film, is indicated mostly. Results overall demonstrate synergistic effect against Al alloy corrosion by combining at a molecular level monomers of conducting polymers and silane functionalities.