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

Area of Science:

• Materials Science
• Electrochemistry

Background:

• Industrialization of aluminum electrodeposition is hindered by electrolyte durability and non-homogeneous Al coating morphology and thickness.
• Existing ionic liquid electrolyte formulations face challenges in large-scale aluminum plating.

Purpose of the Study:

• To investigate the use of a novel, cost-effective additive, light aromatic naphtha solvent, in aluminum electrodeposition.
• To enhance the homogeneity, morphology, and scalability of aluminum coatings produced via electrodeposition.

Main Methods:

• Electrodeposition of aluminum coatings using a 3-butyl-1-ethylimidazolium tetrachloroaluminate electrolyte.
• Addition of varying concentrations of light aromatic naphtha solvent to the electrolyte.
• Electrolyte characterization using cyclic voltammetry.
• Surface characterization of the obtained aluminum coatings.
• Scale-up of the electrodeposition process to larger surface areas and complex geometries.

Main Results:

• Cyclic voltammetry revealed significant changes in the electrochemistry upon additive introduction.
• Increasing additive concentration led to smoother, more homogeneous, and compact aluminum coating morphologies.
• The electrodeposition process was successfully scaled up, demonstrating improved electrolytic bath performance and throwing power.

Conclusions:

• Light aromatic naphtha solvent is an effective and cost-efficient additive for improving aluminum electrodeposition.
• The optimized process yields enhanced aluminum coating quality and demonstrates industrial scalability.
• This advancement addresses key limitations in current aluminum plating technologies.