Hybrid coatings based on conducting polymers and polysiloxane

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

Advanced Materials Research

Trans Tech Publications

Año: 2010 vol. 138 p. 63 - 78

1662-8985

It was previously demonstrated that the use of a pyrrole-based silane (PySi) for surfacetreatment of Al alloys provides both active and barrier protection due to the deposition of a hybridcoating, containing polypyrrole and polysiloxane chains. To further explore these features, a widerrange of Al substrates and different silane-based formulations in terms of silane molecule, solventnature, water amount and pH, were investigated. Also, some tests were carried out by using anilinebasedsilane (AniSi). Structural/morphological characterization of the coatings, as well as theinvestigation of PySi solutions by diverse spectroscopic techniques, in addition to corrosion tests inNaCl, strongly support the very promising protection performance of the hybrid film. This isindicated as well from the preliminary results obtained with the AniSi-based approach. Thus,typical silane-based treatments with principally barrier action can gain in active properties if thesilane compound contains monomers of conducting polymers as a funtional group.