期刊
CORROSION SCIENCE
卷 106, 期 -, 页码 16-24出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2016.01.021
关键词
Aluminium; EIS; Polarization; SIMS; Interfaces; Oxide coatings
资金
- Region Ile-de-France
- Academy of Finland
Electrochemical and surface analyses were applied to study the corrosion mechanisms of aluminium protected by ultra-thin (<= 50 nm) alumina coatings grown by atomic layer deposition. Corrosion takes place via residual channel defects connecting the substrate to the electrolyte through the insulating coating. The data evidence the growth of a spurious aluminium oxide film at the substrate/coating interface in the reactor, that is beneficial to the sealing performance of the thinner films (10 nm). The resistance to the initiation of localized corrosion by pitting is increased with thicker films (20 and 50 nm) owing to improved sealing and barrier properties. (C) 2016 Elsevier Ltd. All rights reserved.
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