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|Title:||Active corrosion protection coating for a ZE41 magnesium alloy created by combining PEO and sol-gel techniques|
|Author:||Ivanou, D. K.|
Yasakau, K. A.
Lisenkov, A. D.
Lamaka, S. V.
Ferreira, M. G. S.
Zheludkevich, M. L.
|Keywords:||PLASMA ELECTROLYTIC OXIDATION|
AZ31 MG ALLOY
|Publisher:||ROYAL SOC CHEMISTRY|
|Abstract:||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.|
|Appears in Collections:||CICECO - Artigos|
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|Active corrosion protection coating for a ZE41 magnesium alloy created by combining PEO and sol-gel techniques_10.1039c5ra22639b.pdf||824.65 kB||Adobe PDF||View/Open|
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