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Method for removing nickel coating on rack and deplating solution

A technology for stripping solution and nickel coating, which is applied in the field of stripping nickel coating method and stripping solution for hangers, can solve the problems of large environmental pollution, corrosion of hangers, etc., achieve reasonable component distribution ratio, reduce strip cost, and improve The effect of adsorption speed

Active Publication Date: 2019-11-29
惠州市安泰普表面处理科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the concentrated nitric acid deplating method will produce a large amount of nitrogen dioxide, which will cause great environmental pollution and easily cause excessive corrosion of the hanger

Method used

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  • Method for removing nickel coating on rack and deplating solution
  • Method for removing nickel coating on rack and deplating solution
  • Method for removing nickel coating on rack and deplating solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0031] For an implementation, see figure 2, a nickel coating stripping system 10 for hangers, including a liquid preparation component 110 , a deplating component 120 , a circulation component 140 and a nickel recovery component 150 . The liquid preparation assembly 110 includes a reagent inlet pipe 111 and a liquid preparation tank 112, the reagent inlet pipe 111 communicates with the liquid preparation tank 112, and the reagent inlet pipe is used to sequentially feed a strong acid and a strong oxidant into the liquid preparation tank , complexing agent, corrosion inhibitor and stabilizer. Described deplating assembly 120 comprises deplating solution circulation pipe 121, deplating tank 122 and stirring device 123, and the first end of described deplating solution circulation pipe 121 communicates with described liquid preparation tank 112, and described deplating solution circulates The second end of the tube 121 communicates with the deplating tank 122 , and the stirring ...

Embodiment 1

[0067] S111, add 40ml / L98% sulfuric acid, 200ml / L50% hydrogen peroxide, 20g / LEDTA, 0.5g / L glycerin and 10g / L hydroxyethylidene diphosphonic acid into the liquid preparation tank, add water to replenish the volume of the solution to 1L, carry out stirring operation, so that the components are mixed evenly, and the deplating solution is obtained.

[0068] S121, the deplating solution is passed into the deplating tank, and under the temperature condition of 25°C, the rack to be stripped is put into the deplating tank, and the stirring and deplating operation is performed to obtain the deplating rack. Tool.

[0069] S131, filling porous cation exchange resin into the exchange mesh column, controlling the exchange mesh column to rotate, passing the deplating solution into the exchange mesh column, performing an ion exchange operation, and obtaining an exchange solution.

Embodiment 2

[0071] S112, add 60ml / L sulfuric acid, 100ml / L ozone, 60g / L citric acid, 0.1g / L hexamethylenetetramine and 20g / L 8-hydroxyquinoline to the liquid preparation tank, add water to make up the volume of the solution It is 1L, and the stirring operation is carried out so that the components are mixed uniformly to obtain the deplating solution.

[0072] S122, the deplating solution is passed into the deplating tank, and under the temperature condition of 40°C, the rack to be stripped is put into the deplating tank, and the stirring and deplating operation is performed to obtain the deplating rack. Tool.

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Abstract

The invention relates to the field of rack deplating methods, and discloses a method for removing a nickel coating on a rack and a deplating solution. The method comprises the following steps: addinga strong acid agent, a strong oxidant, a complexing agent, a corrosion inhibitor and a stabilizer into a liquid preparation tank, and carrying out stirring operation to uniformly mix all the components to obtain the deplating solution, wherein the mass ratio of the strong acid agent, the strong oxidant, the complexing agent, the corrosion inhibitor and the stabilizer is (40-60):(100-200):(20-60):(0.1-0.5):(10-20); and feeding the deplating solution into a deplating tank, placing the rack to be deplated into the deplating tank at the temperature of 25-40 DEG C, and carrying out stirring and deplating operation to obtain the deplating rack. Compared with the prior art, the method has the advantages that the nickel coating of the rack can be quickly removed after being soaked at normal temperature instead of heating and electrifying, the service life of the deplating solution is long, no corrosion is caused to a rack substrate, no harmful gas is generated, the cost can be saved, and the environment-friendly and economical purposes of social multi-requirements are met.

Description

technical field [0001] The invention relates to the field of deplating methods for racks, in particular to a method for stripping nickel coatings for racks and a stripping solution. Background technique [0002] Every time after electroless nickel plating, the stainless steel hanger needs to be stripped. The removal of the coating on the hanger is a very important process. This is because if the hanger is not stripped of the coating, and the hanger with the coating is directly used to hang the nickel-plated product, the quality of the nickel-plated product will be affected. Direct negative impact; if every time electroless nickel plating adopts new hanger, the cost of electroless nickel plating will be seriously increased, seriously restricting the development of electroless nickel plating industry. [0003] Existing stripping methods mainly include electrolytic stripping and chemical stripping. However, the existing electrolytic deplating method needs to increase the powe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F1/28C23F1/46
CPCC23F1/28C23F1/46
Inventor 谢彪
Owner 惠州市安泰普表面处理科技有限公司
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