Robust Aluminum Electrodeposition from Ionic Liquid Electrolytes Containing Light Aromatic Naphta as Additive

Aluminum electrodeposition can be carried out from several ionic liquid electrolyte formulations. Nevertheless, this plating process has not been industrialized so far because of the durability of the electrolytes and because the Al coatings obtained are non‐fully homogeneous in terms of coating mor...

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Bibliographic Details
Published in:ChemistryOpen (Weinheim) 2019-08, Vol.8 (8), p.1094-1099
Main Authors: Guinea, Elena, Salicio‐Paz, Asier, Iriarte, Aitor, Grande, Hans‐Jürgen, Medina, Estíbaliz, García‐Lecina, Eva
Format: Article
Language:English
Subjects:
Additives
Al coating
Aluminum
Aluminum coatings
Aqueous solutions
Chloride
Coated electrodes
Electrochemistry
Electrodeposition
Electrodes
Electrolytes
Flat plates
Formulations
Hydrocarbons
Investigations
Ionic liquids
Light
metal electroplating
Morphology
Naphtha
Optimization
scanning electron microscopy
Solvents
Surface properties
Throwing
Throwing power
Voltammetry
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Summary:Aluminum electrodeposition can be carried out from several ionic liquid electrolyte formulations. Nevertheless, this plating process has not been industrialized so far because of the durability of the electrolytes and because the Al coatings obtained are non‐fully homogeneous in terms of coating morphology and thickness distribution. In this work we electrodeposited Al coatings from a 3‐butyl‐1‐ethylimidazolium tetrachloroaluminate electrolyte additivated with increasing concentrations of a new cost‐effective additive: light aromatic naphtha solvent. Firstly, electrolytes were characterized by cyclic voltammetry, where changes in the electrochemistry of the process were identified. Then, surface characterization showed that Al coatings morphology turned out to be smoother, more homogeneous and more compact with increasing additive concentration. Furthermore, the process was scaled up to flat plates of 18 cm 2 area and also on 25 cm 2 parts designed with straight corners to demonstrate both the optimization of the electrolytic bath performance and its throwing power enhancement.
ISSN:2191-1363
2191-1363
DOI:10.1002/open.201900183