Method for co-depositing magnesium-neodymium mother alloy near room temperature

Abstract

The invention belongs to the field of non-ferrous metal alloy low-temperature extraction and particularly relates to a method for co-depositing a magnesium-neodymium mother alloy near the room temperature. According to the method for co-depositing the magnesium-neodymium mother alloy near the room temperature, an electrolytic method is adopted. An electrolyte used according to the electrolytic method is composed of neodymium chloride, magnesium chloride, lithium chloride and ion-like liquid, wherein the ion-like liquid accounts for (95-97)% of the total mass of the electrolyte, the neodymium chloride and the magnesium chloride account for (2-4)% of the total mass of the electrolyte, the lithium chloride accounts for 1% of the total mass of the electrolyte, and the mole ratio of the neodymium chloride to the magnesium chloride is 1:1. The process for co-depositing the magnesium-neodymium mother alloy near the room temperature is easy to operate, low in cost and capable of being applied to development of functional materials and surface engineering. Technical reserve and theoretical support are provided for low-cost extraction of magnesium and neodymium.

Description

technical field [0001] The invention belongs to the field of low-temperature extraction of nonferrous metal alloys, and in particular relates to a method for co-depositing magnesium-neodymium master alloys near room temperature. Background technique [0002] Rare earth metals have extremely high chemical activity. Because rare earth elements are more active, they can form stable high-melting point intermetallic compounds with many elements, which are distributed in the grain boundaries and dendrites in the form of a network or skeleton, and have dual functions of impurity removal and modification. effect. Adding a small amount of rare earth element neodymium to magnesium or magnesium alloy can improve the high temperature performance, air tightness and corrosion resistance of the alloy, and it is widely used as aerospace materials. At present, the production methods for preparing rare earth magnesium alloys are roughly summarized as follows: [0003] (1) Direct fusion meth...

AI Technical Summary

Problems solved by technology

However, it is difficult for conventional ionic liquids to be used for electrodeposition of rare earths. The electrochemical window of most ionic liquids is difficult to meet the reduction of active metal magnesium and rare earth elements. Therefore, ionic liquids decompose and deteriorate before the deposition potential of rare earth metals and are difficult to recover.

[0006] In addition, the synthesis process of conventional ionic liquids is complicated, the exchange reaction is not complete, there are competing reactions and by-products, and the obtained products need to be purified and separated in multiple steps, which significantly increases the production cost of ionic liquids and the possibility of environmental pollution, reduces the Green features of ionic liquids

The water content of the final product cannot be guaranteed, which seriously affects the preparation of active metal alloys by ionic liquid electrodeposition

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