Electrodeposition magnesium

Few investigations have been performed using such halide systems as solvents for oxides, although they are of great interest for practical purposes, as media for sodium and magnesium electrodeposition. 

D. E. Bartak, T. D. Schleisman, and E. R. Woolsey, "Electrodeposition and Characteristics of a SUicon—Oxide Coating for Magnesium AUoys," Paper T-91-041, North American Die Casting Association 16th International Die Casting Congress and Exposition, Detroit, Mich., 1991. 

Practices for preparation of and electroplating on Chromium (Electrodeposits) on Chromium Copper and Copper-Base Mllojs Iron Castings Eead and EeadMllojs Magnesium and Magnesium Mllojs Molybdenum and Molybdenum Mlloys MickelMlloys... 

Some metals, which are difficult to deposit electrolytically from aqueous solutions, can be deposited from appropriate 11011-aqueous solutions. They are, for example, alkali metals, magnesium, and aluminum. They are usually deposited at more negative potentials than the reduction of water. The electrodeposition of lithium... 

To date no method has been published that describes the electrodeposition of magnesium or any other Group II metal from tetrachloroaluminate-based ionic liquids. 

In this section we will show that air- and water-stable ionic liquids can be used for the electrodeposition of highly reactive elements which cannot be obtained from aqueous solutions, such as aluminum, magnesium and lithium, and also refractory metals such as tantalum and titanium. Although these liquids are no longer air-and water-stable when AICI3, TaFs, TiCU and others are dissolved, quite interesting results can be obtained in these liquids. 

The electrodeposition of reactive elements like Al, Si, Ge, Ta and a few others is possible. As discussed in Chapter 4.4 the successful electrodeposition of Ti, Mg, Mo and many others in relevant layer thicknesses has not yet been described, though attempts have been made in some cases. Apart from the availability of suitable precursors there is at least one other issue to consider ionic liquids can be reactive. It was found that magnesium and its alloys can form passivating films in ionic liquids with the bis(trifluoromethylsulfonyl)amide (Tf2N) anion, especially in the presence of water. It was found by two of our groups (Endres, MacFarlane) that, under certain circumstances, the Tf2N ion is subject to cathodic... 

There are some reports on the electrodeposition of cobalt [105], nickel, zinc, and magnesium [106] in N(CF3S02)2 ionic liquids. The electrochemical behavior of lanthanide elements has been reported in EMIN(CF3S02)2 and BMPN(CF3S02)2 ionic liquids, though their metals were not obtained within the electrochemical potential windows of these ionic liquids [107]. 

Although many ionic liquids and deep eutectic mixtures based on choline have the advantages to be cheap and no-toxic, they are all hydrophilic and miscible with aqueous solvents. This may be a problem for applications such as the extraction of metal ions from an aqueous phase or the electrodeposition of reactive metals (aluminium, magnesium, tantalum..). 

Electrodeposition and dissolution of magnesium film were studied from the ionic liquid of [BmimJBF with 1 MMgfCFjSOj) at room temperature by Nuli et al. [176, 177]. It was shown that magnesium can be electrodeposited on Ag substrate and the deposits were dense. They also smdied the electrochemical magnesium deposition and dissolution on metal substrates in organic electrolyte... 

Titanium owes its great importance due to its excellent mechanical and corrosion performance. Titanium is produced by reduction of TiCl with magnesium (Kroll method) or sodium (Hunter method). As the cost of Hunter method is higher than Kroll method, Kroll method is considered the most efficient method for titanium electrodeposition. 

Nuh Y, Yang J, Wang P (2006) Electrodeposition of magnesium film from bmimbf ionic liquids. Appl Surf Sci 252 8086-8090... 

Electrodeposition on metal disks is used to prepare very thin sources of the radionuclides discussed in Section 3.7. At very low concentrations in water, certain radionuclides may be deposited on metal disks by sorption or spontaneous electrodeposition (Blanchard et al. 1960). The former yields a relatively low percent deposition on more noble metals, as in the case of deposited on gold. In contrast, spontaneous electrodepostion results in near 100% yield on a less noble metal, for example, in depositing n Ag or divalent Fe on magnesium. Yield must be determined separately for this source preparation step and then combined with the yield observed for the chemical purification steps. 

Jiang, Y.F., et al. 2003. Corrosion protection of polypyrrole electrodeposited on AZ91 magnesium alloys in alkaline solutions. Synth Met 139 (2) 335. 

Kudo, T., M. Kimura, K. Hanabusa, and H. Shirai (1998). Electrical properties of junctions between electrodeposited magnesium phthalocyanine and aluminium. Polym. J. 30(3), 177-180. 

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