A Review on the Electrodeposition of Aluminum and Aluminum Alloys in Ionic Liquids

Abstract

Aluminum plays an essential role as an excellent coating material in diversified applications due to its better corrosion resistance and physicochemical properties. Employing such a material as a coating on different metallic substrates such as carbon steel would benefit many industries such as the automotive, aviation, shipbuilding, construction, electronics etc. Amongst the various available coating techniques, electrodeposition of aluminum (Al) Al alloys have gained significant attention in the last 10 years as a metallic protection coating for various commercial substrates and has become the industry’s choice owing to being lightweight, corrosion-resistant, and cost-effective. This paper shall provide a detailed review covering electrochemical deposition of Al and Al alloys using ionic liquids with various cations, anions, and additives, and reports on progress in development thus far. It shall also cover the challenges in the electrodepositing aluminum, its alloys on light weight metal substrates viz., magnesium (Mg), commercial substrates such as low carbon steel, spring steel, and their pretreatments. The factors that play an important role in electroplating on an industrial scale, along with future challenges, are discussed.

Electrochemical Approaches for the Recovery of Metals from Electronic Waste: A Critical Review

“…The aqueous medium's higher ionic mobility and conductivity make it ideal for depositing metals such as Au, Ag, Fe, Cu, Ni, Co, Zn, W, and Cr [26]. However, it does not deposit metals such as Al, which has a greater negative redox potential of −1.67 V and is also water sensitive, which may quickly lead to the building of a passivation oxidation layer on its surface, slowing or even stopping its electrodeposition in aqueous solutions [27]. Ionic liquids have emerged as promising solvents for addressing this issue [28].…”

Electrodeposition of Nickel matrix composite coatings via various Boride particles: A review

“…sis conditions (presence of additives, the content of the electrolyte bath, pH, electrolyte agitation, and temperature), current circumstances (the kind of enforced current and current density values), and the characteristic of the reinforcing grains (size, concentration, surface characteristics, and the type of distribution in the bath) are all factors that can affect the electrodeposition process and, therefore, the microstructure of the composite coating [11][12][13].…”

Progress in Novel Electrodeposited Bond Coats for Thermal Barrier Coating Systems

“…DESs are a class of ILs (usually low melting point eutectic mixtures) that are formed by mixing hydrogen bond acceptors and hydrogen bond donors. Such systems have been used in electroplating [ 71 ]. Figure 4 a compares the cost of preparing a 1 L plating solution using ILs that are employed for the electrodeposition of Al from the commercially developed ILs and the ones that were demonstrated to be potentially viable.…”

“… Plots showing the cost comparison of the ( a ) ionic liquid-based systems, an inorganic molten salt system for the electrodeposition of Al [ 31 , 72 , 73 , 74 , 75 ], and aqueous electrolyte for the electrodeposition of Pd [ 48 ]; ( b ) the ionic liquid-based systems for the electrodeposition of Al-alloys [ 71 ], considering the initial make up of 1 L solution. Electrodeposition of Al-Ti alloy from solution containing TiCl 2 and TiCl 4 is represented as Al-Ti’ and Al-Ti”, respectively.…”