Method for plating nickel on iron powder surface

Abstract

The invention discloses a method for plating a layer of metallic nickel or nanometer nickel powder onto the surface of iron powder through a hydrothermal reduction technology, which belongs to the technical field of non-ferrous metallurgy and powder metallurgical material. The method comprises the following steps: adding nickel sulfate or nickel sulfate aqueous solution, ammonia water and ammoniasulphate into water according to the certain proportion to prepare mixed solution; adding a small amount of anthraquinone and additive into the mixed solution; then adding the iron powder to be plated by nickel into the mixed solution, shifting the mixed solution containing the iron powder into an autoclave, and sealing the autoclave; carrying out the hydrogen reduction treatment through applyinghigh temperature and pressure to the aqueous solution; forming the compact metallic nickel layer or nanometer nickel powder plating layer through the nickel ions reduced and precipitated onto the surface of the iron power in the solution; and when the plating reaction is completed, cooling down the materials in the autoclave, discharging the iron powder with the surface plated by metallic nickel and the aqueous solution, and obtaining the iron powder product with the surfaced plated by metallic nickel after filtration and drying. The method has a simple production method, easy operation and the controllable plated nickel layer.

Description

technical field [0001] The invention discloses a method for coating nickel on the surface of iron powder, which relates to a method for coating a layer of metal nickel or nano-nickel powder on iron powder by using hydrothermal hydrogen reduction technology, and belongs to the technical field of nonferrous metallurgy and powder metallurgy materials. technical background [0002] Nickel powder is a powder metallurgy material with excellent performance. In recent years, due to the increase in the price of non-ferrous metals and in order to save precious resources, it has been necessary to find a method of nickel cladding (or cladding) to prepare nickel-containing composite powder instead of pure nickel powder. It has become a trend. At the same time, cladding powder can also solve the problem of inhomogeneity when different powders are mixed. Therefore, the development of new cladding composite powder manufacturing technology is a new trend in powder metallurgy. For example, th...

AI Technical Summary

Problems solved by technology

[0030] The purpose of the present invention is: combine the characteristics of current nickel smelting extraction industry and nickel renewable resource recovery, according to the performance requirements of nickel-iron composite powder, use nickel sulfate solution or sulfuric acid Nickel and iron powder are used as raw materials, and the iron powder as the core is coated with a metal nickel layer or nano-nickel powder by the hydrothermal hydrogen reduction method. The product can be used in the preparation of functional materials or composite materials to meet different needs and solve the problem of powder metallurgy manufacturing. Inhomogeneous mixing of raw materials in the process, and the poor comprehensive performance of iron powder as a functional material such as oxidation resistance, corrosion resistance and wear resistance