期刊
CORROSION SCIENCE
卷 51, 期 7, 页码 1506-1512出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2008.10.039
关键词
Aluminium; Galvanostatic; Anodic films
资金
- National Research Foundation of Korea [2007-2004281] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
The generation mechanism of microdischarges during plasma electrolytic oxidation (PEO) of aluminium was investigated at constant Current densities in aqueous alkaline solutions. Microdischarges were generated only in weakly alkaline solutions under high applied voltages. The breakdown voltage of the anodic oxide film was not dependent on the applied anodic current density while it was strongly dependent on the OH- concentration in the solution. The size and density of microdischarges became larger and lower, respectively, with increasing PEO treatment time. The mechanism of microdischarge generation Could be explained based on the movement of ions in the oxide film and resistive property of the oxide him. (C) 2008 Elsevier Ltd. All rights reserved.
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