Aniline-based silane as a primer for corrosion inhibition of aluminium

Hybrid films based on polyaniline and polysiloxane moieties were successfully deposited on commercial aluminium alloy using N-(3-trimethoxysilylpropyl)aniline (AnSi) as primer. The spectroscopic studies conducted on both the silane solution and the resulting films, jointly with several corrosion tests in NaCl, strongly support the protection performance of the hybrid films. The overall study demonstrates that typical silane-based treatments with principally barrier action can gain in active properties if the silane compound contains monomers of conducting polymers as a functional group.

► Hybrid aniline-based silane films on Al alloy AA1050. ► Optimal performance against AA1050 corrosion. ► Synergistic effect of combining monomers of conducting polymers and silane functionalities at a molecular level.