The protection mechanism of Al alloys by aniline-based silane (AnSi) was investigated by different experi-mental approaches. In particular, spectroscopic techniques were used for studying the chemistry of AnSisolution as a function of pH and water content, as well as in the presence of different metal ions. Inaddition, monitoring of structural changes of AnSi-based films deposited on different Al alloys duringexposure to mild aggressive conditions (humidity and laboratory environments) was carried out. Electro-chemical techniques, namely impedance measurements (Mott–Schottky analysis) and potentiodynamicpolarization were applied for investigating relationships between the semiconductor behavior and theprotection capacity of AnSi-based films in NaCl. Overall results converge to confirm that the protectioncapacity of the hybrid AnSi-based films is strictly determined by both charge transfer N H· · ·N complexesand metal–aniline interactions during the surface treatment step.
An in-depth comprehension of the protection mechanism of Al alloysby aniline-based silane / S. Bianchi, M. Trueba, S.P. Trasatti, E. Madaschi, M.C. Sala. - In: PROGRESS IN ORGANIC COATINGS. - ISSN 0300-9440. - 77:12 part A(2014 Mar 12), pp. 2054-2065. [10.1016/j.porgcoat.2014.02.005]
An in-depth comprehension of the protection mechanism of Al alloysby aniline-based silane
M. Trueba
;S.P. TrasattiUltimo
;
2014
Abstract
The protection mechanism of Al alloys by aniline-based silane (AnSi) was investigated by different experi-mental approaches. In particular, spectroscopic techniques were used for studying the chemistry of AnSisolution as a function of pH and water content, as well as in the presence of different metal ions. Inaddition, monitoring of structural changes of AnSi-based films deposited on different Al alloys duringexposure to mild aggressive conditions (humidity and laboratory environments) was carried out. Electro-chemical techniques, namely impedance measurements (Mott–Schottky analysis) and potentiodynamicpolarization were applied for investigating relationships between the semiconductor behavior and theprotection capacity of AnSi-based films in NaCl. Overall results converge to confirm that the protectioncapacity of the hybrid AnSi-based films is strictly determined by both charge transfer N H· · ·N complexesand metal–aniline interactions during the surface treatment step.File | Dimensione | Formato | |
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