Closed-cell aluminium foams stimulate great interest due to their low density combined with typical proprieties of the base metal that make them suitable for many applications, from sound and energy absorption, to flame resistance and structural applications, if used in a sandwich structure. The most cost efficient production method produces a highly complex surface morphology that could be a weakness point in terms of corrosion resistance. To enhance the corrosion behaviour, the foams have been anodized in two different ways, at a constant potential and imposed a pulsed current. The thickness and the defectiveness of the oxide layer have been evaluated via optical and electronic microscope observation. The corrosion protection on the other side has been assessed by accelerated corrosion tests. Particular attention has been paid on the influence of foam microstructure on the anodic oxide growth.
Studio del processo di anodizzazione per la protezione dalla corrosione di schiume metalliche / Rossi, S.; Fedel, M.; Deflorian, F.; Bizzotto, Mirco. - In: LA METALLURGIA ITALIANA. - ISSN 0026-0843. - STAMPA. - 110:10(2018), pp. 12-19.
Studio del processo di anodizzazione per la protezione dalla corrosione di schiume metalliche
Rossi, S.;Fedel, M.;Deflorian, F.;
2018-01-01
Abstract
Closed-cell aluminium foams stimulate great interest due to their low density combined with typical proprieties of the base metal that make them suitable for many applications, from sound and energy absorption, to flame resistance and structural applications, if used in a sandwich structure. The most cost efficient production method produces a highly complex surface morphology that could be a weakness point in terms of corrosion resistance. To enhance the corrosion behaviour, the foams have been anodized in two different ways, at a constant potential and imposed a pulsed current. The thickness and the defectiveness of the oxide layer have been evaluated via optical and electronic microscope observation. The corrosion protection on the other side has been assessed by accelerated corrosion tests. Particular attention has been paid on the influence of foam microstructure on the anodic oxide growth.File | Dimensione | Formato | |
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