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Electrodeposition of Zn-Mn coatings on steel from 1-ethyl-3-methylimidazolium bis (trifluoromethanesulfonyl) imide ionic liquid

AutorMarín-Sánchez, M.; Ocón, P.; Conde, A. ; García, Ignacio
Palabras claveZinc-manganese alloy
Ionic liquid
Dual phase DP-1000 steel
Electrodeposition
Fecha de publicación2014
EditorElsevier
CitaciónSurface and Coatings Technology 258: 871-877 (2014)
Resumen© 2014 Elsevier B.V. This work studies the electrodeposition of Zn-Mn alloy on high-resistance steel substrates from 1-ethyl-3-methylimidazolium-bis (trifluoromethanesulfonyl) imide ionic liquid and Zn and Mn bis (trifluoromethanesulfonyl) imide salts and their sacrificial corrosion protection properties. The cleaning of the electrodeposited Zn-Mn alloy for the purpose of removing any ionic liquid remains has proved to be a fundamental step. A variety of solvents were tested, showing that the best results were obtained with dichloromethane (CH2Cl2) since this solvent removed the ionic liquid residues without reacting with the electrodeposited coating. The Zn/Mn ratio in the electrodeposited material is dependent on the concentration of the solution salt, as well as on the potential chosen for electrodeposition. The most promising Zn-Mn alloy was electrodeposited from 0.15M Zn to 0.3M Mn salt solution at -1.8V. The electrodeposited coating under these conditions shows a shift in the corrosion potential towards nobler values due to the Mn incorporation in the alloy, and has sacrificial properties that show lower dissolution rates than Zn when galvanic coupled with steel with an area ratio of 1:1.
URIhttp://hdl.handle.net/10261/112346
DOI10.1016/j.surfcoat.2014.07.064
Identificadoresdoi: 10.1016/j.surfcoat.2014.07.064
issn: 0257-8972
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