Recently, a method for nickel plating of iron powder surface developed by scientific research personnel of Jiangxi University of Science and Technology has obtained a national patent.
According to reports, this is a method of coating a layer of metallic nickel or nano-nickel powder on the surface of iron powder by hydrothermal hydrogen reduction technology, belonging to the technical field of non-ferrous metallurgy and powder metallurgy materials. The production process of the invention is simple, easy to operate, and the nickel plating layer is controllable.
The new method is to add nickel sulfate or nickel sulfate aqueous solution, ammonia water, ammonium sulfate to water in a certain proportion, to prepare a mixed solution, add a small amount of bismuth, an additive, and then add the iron powder to be nickel-coated to the mixed solution. Then, the mixed solution containing iron powder was transferred into an autoclave, and the autoclave was sealed. In the autoclave, the high-temperature and high-pressure aqueous solution is subjected to hydrogen reduction treatment, and nickel ions in the solution are reduced and deposited on the surface of the iron powder to form a dense metallic nickel layer or a nano-nickel powder coating layer. After the plating reaction is completed, the material in the autoclave is cooled, and the iron powder and the aqueous solution coated with metallic nickel are discharged, filtered, and dried to obtain an iron powder product whose surface is coated with nickel metal.
According to reports, this is a method of coating a layer of metallic nickel or nano-nickel powder on the surface of iron powder by hydrothermal hydrogen reduction technology, belonging to the technical field of non-ferrous metallurgy and powder metallurgy materials. The production process of the invention is simple, easy to operate, and the nickel plating layer is controllable.
The new method is to add nickel sulfate or nickel sulfate aqueous solution, ammonia water, ammonium sulfate to water in a certain proportion, to prepare a mixed solution, add a small amount of bismuth, an additive, and then add the iron powder to be nickel-coated to the mixed solution. Then, the mixed solution containing iron powder was transferred into an autoclave, and the autoclave was sealed. In the autoclave, the high-temperature and high-pressure aqueous solution is subjected to hydrogen reduction treatment, and nickel ions in the solution are reduced and deposited on the surface of the iron powder to form a dense metallic nickel layer or a nano-nickel powder coating layer. After the plating reaction is completed, the material in the autoclave is cooled, and the iron powder and the aqueous solution coated with metallic nickel are discharged, filtered, and dried to obtain an iron powder product whose surface is coated with nickel metal.
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