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Issue 15, 2016
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Active corrosion protection coating for a ZE41 magnesium alloy created by combining PEO and sol–gel techniques

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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 μm) 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.

Graphical abstract: Active corrosion protection coating for a ZE41 magnesium alloy created by combining PEO and sol–gel techniques

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Article information


Submitted
28 Oct 2015
Accepted
22 Jan 2016
First published
26 Jan 2016

RSC Adv., 2016,6, 12553-12560
Article type
Paper
Author version available

Active corrosion protection coating for a ZE41 magnesium alloy created by combining PEO and sol–gel techniques

D. K. Ivanou, K. A. Yasakau, S. Kallip, A. D. Lisenkov, M. Starykevich, S. V. Lamaka, M. G. S. Ferreira and M. L. Zheludkevich, RSC Adv., 2016, 6, 12553
DOI: 10.1039/C5RA22639B

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