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Method of replating nickel on metal coated piece

A metal plating and repair plating technology, applied in the field of nickel repair plating of metal plating parts, can solve the problems of complicated operation, bad user impression, long working time, etc., and achieve the effect of simplifying the process, ensuring the bonding force, and simple operation.

Inactive Publication Date: 2009-08-26
CHONGQING CONSTR ELECTROMECHANICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process is not only complicated to operate, but also takes a long time to work in the whole process, and the bonding force of the coating after repairing is not good.
Some of them showed up at the time, and some showed up after delivery, leaving a very bad impression on users.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Use the conventional method to degrease and clean the surface of the metal plated parts, according to the hydrochloric acid: 300 g / liter, use the nickel cathode plate, activate the electrolytic acid with the anode current of 2 amps / square decimeter for 3 minutes, and then use the conventional method The method is to re-plate bright nickel, wash twice, activate sulfuric acid, plate bright chrome, and re-plate 10 shift pedals. After plating, the binding force of the coating was measured by the file method, and the test result was qualified.

Embodiment 2

[0018] Use conventional methods to degrease and clean the surface of metal plated parts. According to hydrochloric acid: 300 g / liter, use nickel cathode plate, activate electrolytic acid with an anode current of 2.5 amps / square decimeter for 2.5 minutes, and then use conventional The method is to re-plate bright nickel, wash twice, activate sulfuric acid, plate bright chrome, and re-plate 10 shift pedals. After plating, the binding force of the coating was measured by the file method, and the test result was qualified.

Embodiment 3

[0020] Use the conventional method to degrease and clean the surface of the metal plated parts. According to hydrochloric acid: 330 g / liter, use nickel cathode plate, activate the electrolytic acid with an anode current of 3 amps / square decimeter for 2 minutes, and then use conventional The method is to re-plate bright nickel, wash twice, activate sulfuric acid, plate bright chrome, and re-plate 10 pieces of shock-absorbing springs. After plating, the binding force of the coating was measured by the file method, and the test result was qualified.

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PUM

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Abstract

The invention discloses a method for re-plating nickel on a metal plated part, which is characterized in that it comprises the following steps: (1) cleaning the surface of the metal plated part by a conventional method; g / L, the parts are subjected to an anodic current of 2-4 amps / dm2, and a nickel plate is used for the cathode, time: 1-3 minutes; (3) Nickel supplementation, cleaning, activation and chrome plating are carried out by conventional methods. The invention has good bonding force between the plating layer and the workpiece after replating, simple process and good product surface quality.

Description

technical field [0001] The invention belongs to the field of surface treatment of metal materials, and in particular relates to a nickel replating method for a metal plating piece with good bonding force after replating and simple operation. Background technique [0002] In the process of industrial production, it is often necessary to electroplate the surface of parts to improve the anti-corrosion performance and decoration of the surface. In the process of decorative chrome plating, due to some uncontrollable factors sometimes, the coating is partially incomplete or faded. When this happens, the unqualified coating does not need to be removed and re-plated, but only needs to be re-plated, that is, it will be removed. A thin decorative chromium layer (only 0.25-0.5 microns) and a part of the nickel layer are added to the thickness of the nickel layer, and then the decorative chromium layer is electroplated. At present, the process flow of replating is: anode degreasing→cat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D3/12C25D5/06C25D5/34
Inventor 时毅容
Owner CHONGQING CONSTR ELECTROMECHANICAL CO LTD