Plasma anodized ZE41 magnesium alloy sealed with hybrid epoxy-silane coating

authors	Ivanou, DK; Starykevich, M; Lisenkov, AD; Zheludkevich, ML; Xue, HB; Lamaka, SV; Ferreira, MGS
nationality	International
journal	CORROSION SCIENCE
author keywords	Magnesium; Alloy; EIS; SEM; Anodic films; Polymer coatings
keywords	MICRO-ARC OXIDATION; AZ31B MG ALLOY; ELECTROLYTIC OXIDATION; CORROSION-RESISTANCE; CERAMIC COATINGS; PEO COATINGS; LI ALLOY; SURFACE; MICROSTRUCTURE; PROTECTION
abstract	Anodic coatings on magnesium ZE41 alloy were formed by DC plasma electrolytic oxidation (PEO) in spark regime in solution composed of NaOH, Na2SiO3 and KF. The positive effect of poly(ethylene oxide) addition into the anodizing electrolyte on PEO process, anodic film porosity and its protective performance was described. Anodic films were sealed with hybrid epoxy-silane formulation. The corrosion behavior of the coated ZE41 was studied through electrochemical impedance spectroscopy (EIS) in 0.6 M NaCl solution. Resulting duplex PEO/epoxy-silane coating provides good protective performance without significant signs of corrosion during 1 month of immersion test. (C) 2013 Elsevier Ltd. All rights reserved.
publisher	PERGAMON-ELSEVIER SCIENCE LTD
issn	0010-938X
year published	2013
volume	73
beginning page	300
ending page	308
digital object identifier (doi)	10.1016/j.corsci.2013.04.019
web of science category	Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering
subject category	Materials Science; Metallurgy & Metallurgical Engineering
unique article identifier	WOS:000320736900032