期刊
RSC ADVANCES
卷 6, 期 15, 页码 12553-12560出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5ra22639b
关键词
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资金
- Portuguese Foundation for Science and Technology (FCT) [PTDC/CTM-MET/112831/2009]
- FCT [REDE/1509/RME/2005, SFRH/BPD/80754/2011, IF/00856/2013]
- Alexander von Humboldt foundation
- Fundação para a Ciência e a Tecnologia [SFRH/BPD/80754/2011, PTDC/CTM-MET/112831/2009] Funding Source: FCT
An active protective coating for ZE41 magnesium alloy was produced by sealing an anodic layer, loaded with 1,2,4-triazole, with a sol-gel film. An anodic oxide layer was formed using PEO in a silicate-fluoride alkaline solution. This thin (1.8 mu m) porous PEO layer was impregnated with corrosion inhibitor 1,2,4-triazole and sealed with a silica-based sol-gel film modified with titanium oxide. For the first time it was demonstrated that this relatively thin PEO-based composite coating revealed high barrier properties and provided superior protection against corrosion attack during 1 month of continuous exposure to 3% NaCl. A scanning vibrating electrode technique showed a sharp decrease (100 times) of corrosion activity in micro defects formed in the 1,2,4-triazole doped composite coating, when compared to blank samples.
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