期刊
ELECTROCHIMICA ACTA
卷 77, 期 -, 页码 60-64出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2012.05.062
关键词
Scanning electrochemical microscopy; Alternating current; AC-SECM; Paint coatings; Blistering; Chloride ions
资金
- German Academic Exchange Service (DAAD)
- Spanish Ministry of Science and Innovation (MICINN, Madrid, Accion Integrada) [HA2006-0077]
- DFG [SFB 459 (A5)]
- project Elucidation of corrosion phenomena with high lateral resolution using scanning probe techniques [SCHU 929/9-1]
- EU
- state NRW
- Ministerio de Ciencia e Innovacion (Madrid, Spain)
- European Regional Development Fund (Brussels, Belgium) [CTQ2009-12459]
An early specific effect of chloride ions on the heterogeneous swelling at the metal-polymer interface in non-defective coated metals is elucidated using frequency-dependent alternating-current scanning electrochemical microscopy (AC-SECM). Spatially-resolved differences in the topography of the coated sample are visualized upon prolonged incubation with chloride-containing electrolyte, thus allowing to assume a direct evidence of chloride ion permeation through the polymer matrix simultaneous to water uptake. The implications of this finding are particularly relevant towards the development of a new mechanistic model for blister initiation in coated metals. (C) 2012 Elsevier Ltd. All rights reserved.
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