Study of filiform corrosion inhibition by a compact plasma electrolytic oxidation film on a AZ31 Mg alloy
| Autor: | Yong Wang, Fuhui Wang, Keqin Du, Quanzhong Guo, Xinghua Guo |
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| Rok vydání: | 2016 |
| Předmět: |
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Materials science 020209 energy General Chemical Engineering Metallurgy Alloy 02 engineering and technology General Chemistry engineering.material Plasma electrolytic oxidation 021001 nanoscience & nanotechnology Cathodic protection Corrosion Ion Chemical engineering Scratch 0202 electrical engineering electronic engineering information engineering Immersion (virtual reality) engineering 0210 nano-technology computer computer.programming_language |
| Zdroj: | RSC Advances. 6:39053-39062 |
| ISSN: | 2046-2069 |
| DOI: | 10.1039/c5ra26905a |
| Popis: | This work reports that the filiform corrosion of a AZ31B Mg alloy can be inhibited by compact plasma electrolytic oxidation (PEO) under a transient self-feedback control mode. Corrosion protection of the C-PEO film was investigated through an immersion test of 3.5 wt% NaCl solution and a simulative service environment test of NSST, respectively. The results revealed that compactness of the film significantly influenced the corrosion protection property of the C-PEO-coated Mg alloy, and the results are summarized as follows: (1) good compactness of the PEO film prevented the soluble ions from diffusing into the scratch; (2) the high insulation of the compact PEO film can slow down cathodic current; (3) the corrosion products could deposit on the scratch and block the active sites on the Mg alloy surface. |
| Databáze: | OpenAIRE |
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