Electrochemical treatment of aluminium alloy 7075 in aqueous solutions of imidazolium phosphonate and phosphate ionic liquids and scratch resistance of the resultant materials
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Arrés Gonzalez, Maria del Mar; Jiménez Ballesta, Ana Eva; Arias Pardilla, Joaquín; Martínez Nicolás, Ginés; Bermúdez Olivares, María DoloresResearch Group
Grupo de Ciencia de Materiales e Ingeniería MetalúrgicaKnowledge Area
Ciencia de los Materiales e Ingeniería MetalúrgicaSponsors
This work received the financial support of the Ministerio de Economía y Competitividad (MINECO, Spain) and the EU FEDER Program (Grant MAT2014-55384-P), and the Fundación Séneca, Agencia de Ciencia y Tecnología de la Región de Murcia for a “Ayuda a las Unidades y Grupos de Excelencia Científica de la Región de Murcia (Programa Séneca 2014)” (Grant 19877/GERM/14).Publication date
2017Publisher
ElsevierBibliographic Citation
Arrés, María-del-Mar & Jiménez, Ana-Eva & Arias-Pardilla, Joaquin & Martínez-Nicolás, Ginés & Bermúdez, María-Dolores. (2016). Electrochemical treatment of aluminium alloy 7075 in aqueous solutions of imidazolium phosphonate and phosphate ionic liquids and scratch resistance of the resultant materials. Tribology International. 113. 10.1016/j.triboint.2016.10.031.Keywords
AluminiumIonic liquids
Anodization
Chronoamperometry
Abrasion
Abstract
The abilitiy of 1-ethyl-3-methylimidazolium ethylphosphonate ([ImPhosphonate]) and 1-ethyl-3-methylimidazolium diethylphosphate ([ImPhosphate]) ionic liquids (ILs) to interact with anodized Al7075 T6 aluminium alloy has been studied via electrochemical techniques under different applied potentials, inside and outside the passivation regions. SEM, EDX and XPS analysis have been used to study the composition of the surface coatings. The abrasion resistance after treatment with the ILs has been studied by scratch tests under progressive load, and compared with the performance of the unprotected material and the anodized alloy. While conventional anodization only improves the abrasion resistance of Al7075 in a 30%, the maximum reduction of the penetration depth, 86% with respect to Al7075 and 79% with respect to the anodized alloy, is obtained for the material treated with [ImPhosphonate] at 1 V, in the passivation region. Under these conditions, a phosphorus-containing alumina layer is ...
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