Method for plating nickel on iron powder surface

A technology of surface coating and iron powder, which is applied in the direction of liquid chemical plating, coating, metal material coating process, etc., can solve the problems of iron powder's poor oxidation resistance, corrosion resistance and wear resistance, uneven mixing of raw materials, etc. , to achieve good product quality, avoid uneven cladding and short process

Inactive Publication Date: 2009-05-13
张建玲
View PDF5 Cites 22 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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 pow...

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042]The surface of iron powder is coated with metal nickel layer. Weigh 20Kg of nickel sulfate and 5.4Kg of ammonium sulfate, add them to the stirring tank, pour 30L of deionized water, heat and stir to dissolve, measure 12.3L of ammonia water with a concentration of 25%, add them to the stirring tank, and the nickel sulfate and sulfuric acid in the tank Mix the ammonium aqueous solution, and then dilute the solution to a total volume of 60L with deionized water to prepare a mixed solution containing nickel 70g / L, ammonia-nickel ratio 2.3, and ammonium sulfate 90g / L; add 6g of anthraquinone, according to the total amount of additives 3.6g Add a mixture of polyvinylpyrrolidone (PVP) and polypropylene glycol (PPG); weigh 20.5Kg of iron powder, soak and wash with dilute sulfuric acid with a concentration of 1.5g / L for about 8 minutes, wash off the oxide layer on the surface, and filter Finally, wash once with deionized water, add the iron powder after filtering into the mixed s...

Embodiment 2

[0045] The surface of the iron powder is coated with nano-nickel powder. Measure 40L of nickel sulfate solution containing 54.1g / L of nickel, add 6.6Kg of ammonium sulfate, mix in the stirring tank, heat and dissolve, measure 9.6L of ammonia water with a concentration of 25%, add it into the stirring tank, and the nickel sulfate in the tank Mix with ammonium sulfate aqueous solution, and then dilute the solution to a total volume of 60L with deionized water to prepare a blue mixed solution containing nickel 36.07g / L, ammonia-nickel ratio 3.5, and ammonium sulfate 110g / L; add anthraquinone 9g, press The total amount of additives is 7.8g, and the mixture of gelatin and polyethylene glycol (PEG) is added; 23.5Kg of iron powder is weighed, soaked and washed with dilute sulfuric acid with a concentration of 3.0g / L for about 8 minutes, and the oxide layer on the surface is washed away , washed once with deionized water after filtration, added the iron powder after filtration into th...

Embodiment 3

[0048] The mixed gas of hydrogen and inert gas is used instead of pure hydrogen as the reducing gas to coat the surface of iron powder with a nickel layer. Weigh nickel sulfate 25.7Kg and 3.0Kg ammonium sulfate, add in the stirring tank, pour into 36L of deionized water, heat and stir to dissolve, measure concentration and be 25% ammonia water 17.2L, add in the stirring tank, and nickel sulfate in the tank and Mix ammonium sulfate aqueous solution to completely dissolve nickel sulfate, then dilute the solution to a total volume of 60L with deionized water to prepare a mixed solution containing nickel 90g / L, ammonia-nickel ratio 2.5, and ammonium sulfate 50g / L; add anthraquinone 6g , add bone glue according to the total amount of additives 1.8g; weigh 8Kg of iron powder, soak and wash with dilute sulfuric acid with a concentration of 1.5g / L for about 6 minutes, filter and wash once with deionized water, and add the filtered iron powder to the mixed solution , then transfer the ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

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 ammonia sulphate 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 applying high 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...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C23C18/34B22F9/26
Inventor 张建玲
Owner 张建玲
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap