Method for producing nickel coating on metal surface

A technology of metal surface and nickel coating, applied in the field of preparation of bright nickel coating, can solve the problems of reducing anti-corrosion performance, coating peeling off, and limited application range, etc., achieves high tensile strength and surface hardness, improves interface bonding force, and broad The effect of applying the foreground

Inactive Publication Date: 2008-08-20
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing technology mainly focuses on the electrodeposition of thin nickel coatings, so that in some processes such as deep rolling and deep drawing, the substrate is easily exposed because the coating is too thin; and due to the interface between the thick coating and the substrate Thick coatings are prone to coating peeling and peeling due to excessive stress or improper heat treatment process
The diffusion layer of the existing nickel-clad steel strip is mainly Fe-Ni or Fe-Ni-C di

Method used

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  • Method for producing nickel coating on metal surface
  • Method for producing nickel coating on metal surface
  • Method for producing nickel coating on metal surface

Examples

Experimental program
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Embodiment 1

[0037] The base belt is made of ordinary Q235 low-carbon steel belt, 99.9% pure iron sheet, 99% pure copper sheet, and the thickness is 0.3mm.

[0038] 1) Degrease the low carbon steel strip, pure iron sheet and pure copper sheet:

[0039] The degreasing is alkaline cleaning or / and electrolytic degreasing, and the alkaline cleaning and degreasing is to place steel strips, pure iron sheets, and pure copper sheets in a solution tank for chemical degreasing to remove steel strips, pure iron sheets, and pure copper sheets. For the grease on the surface of the copper sheet, the composition of the chemical degreasing solution is preferably 50g / L sodium hydroxide, 35g / L sodium carbonate, 25g / L sodium phosphate, the solution temperature is 70°C, and the current density is 4A / dm 2 , Degreasing time 5min. Electrolytic degreasing is to place steel strips, pure iron sheets, and pure copper sheets in a solution tank for electrochemical degreasing to further remove residual grease on the s...

Embodiment 2

[0051] 1) Steel strip, pure iron sheet, pure copper sheet are degreased; Described degreasing is alkali cleaning degreasing or / and electrolytic degreasing, and alkali cleaning degreasing is that steel strip, pure iron sheet, pure copper sheet are placed Chemical degreasing in the solution tank to remove grease on the surface of steel strips, pure iron sheets, and pure copper sheets. The best solution components for chemical degreasing are sodium hydroxide 60g / L, sodium carbonate 40g / L, sodium phosphate 30g / L, Solution temperature 80℃, current density 7A / dm 2 , Degreasing time 10min. Electrolytic degreasing is to place steel strips, pure iron sheets, and pure copper sheets in a solution tank for electrochemical degreasing to further remove residual grease on the surface. The composition of the electrolytic degreasing solution is sodium hydroxide 60g / L, sodium carbonate 40g / L , sodium phosphate 45g / L, sodium silicate 4g / L, solution temperature 65°C, current density 6A / dm 2 , D...

Embodiment 3

[0063] 1) Steel strip, pure iron sheet, pure copper sheet are degreased; Described degreasing is alkali cleaning degreasing or / and electrolytic degreasing, and alkali cleaning degreasing is that steel strip, pure iron sheet, pure copper sheet are placed Chemical degreasing in the solution tank to remove grease on the surface of steel strips, pure iron sheets, and pure copper sheets. The composition of the chemical degreasing solution is sodium hydroxide 60g / L, sodium carbonate 40g / L, sodium phosphate 30g / L, solution temperature 80℃, current density 7A / dm 2 , Degreasing time 10min. Electrolytic degreasing is to place steel strips, pure iron sheets, and pure copper sheets in a solution tank for electrochemical degreasing to further remove residual grease on the surface. The composition of the electrolytic degreasing solution is sodium hydroxide 60g / L, sodium carbonate 40g / L , sodium phosphate 45g / L, sodium silicate 4g / L, solution temperature 65°C, current density 6A / dm 2 , Deg...

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Abstract

A method for preparing nickel coating on metal surface relates to metal plating and provides a method for preparing nickel coating on the metal surface. The metal surface goes through oil removal and is placed in a solution tank and plated with tin coating and then placed in the solution tank; after being plated with tin, the metal surface is plated with the nickel coating; the metal plated with the nickel coating is placed in the solution tank for passivation treatment, heat preservation, hydrogen removal from the nickel coating, diffusion annealing treatment and stress relief heat treatment. High interfacial strength single-phase solid solution is obtained by rapid cooling after adopting thick nickel and tin coating, adding thin tin coating and diffusion annealing treatment. Plating bath is not added with a brightening agent while the plating coat is bright and smooth and forms a single-phase solid solution structure, thus enhancing interface combining power of the plating coat and a base plate. The method makes use of the principle predicted by a binary phase diagram that tin and nickel are mutually exclusive within a large composition range, so as to lead iron uncoated rate and copper uncoated rate to tend to be zero under the effect of a tin diffusion blocking layer, thus the plating coat can keep relatively high antiseptic property. Other machinery properties are also good; therefore, the nickel coating prepared by the method of the invention can serve as multifunctional antirust coating.

Description

technical field [0001] The invention relates to metal electroplating, in particular to a method for preparing a bright nickel coating on general metals such as low-carbon steel strips, pure iron sheets, pure copper sheets and the like. Background technique [0002] U.S. Patent No. 5,679,181 discloses a production process for a corrosion-resistant nickel-coated steel strip. The process is nickel-plated on at least one side of a cold-rolled steel strip, so that part or all of the nickel coating becomes an iron / nickel diffusion layer, and the iron on the surface of the nickel-plated layer is The exposure rate accounts for 4% to 30%. [0003] European patent EP1111697 discloses a production process for battery shells or surface-treated steel strips with the same structure, steel strips and batteries. The process is heat-treated at 300-650 °C for 4-10 hours in an inert gas or oxygen-removing atmosphere. Iron / nickel and nickel / bismuth diffusion layers are formed at the respective...

Claims

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Application Information

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IPC IPC(8): C25D5/12C25D5/34C25D3/30C25D3/12C25D5/50
Inventor 刘兴军李伟生王翠萍马云庆林众张锦彬黄艺雄
Owner XIAMEN UNIV
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