Method for stripping nickel coating of hanger and stripping solution

A technology of nickel coating and stripping solution, which is applied in the field of nickel coating removal method and stripping solution for hangers, can solve the problems of hanger corrosion and large environmental pollution, reduce the cost of stripping, avoid the generation of harmful gases, The effect of increasing the adsorption speed

Active Publication Date: 2022-01-04
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 stripping nickel coating of hanger and stripping solution
  • Method for stripping nickel coating of hanger and stripping solution
  • Method for stripping nickel coating of hanger and stripping 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 deplating methods for racks, and discloses a method for removing nickel coatings on racks and a stripping solution. The agent is added into the liquid preparation tank, and the stirring operation is carried out so that the components are mixed evenly to obtain the deplating solution; wherein, the mass ratio of the strong acid agent, strong oxidizing agent, complexing agent, corrosion inhibitor and stabilizer is (40~ 60): (100~200): (20~60): (0.1~0.5): (10~20); put the deplating solution into the deplating tank, under the temperature condition of 25℃~40℃, Putting the rack to be stripped into the deplating tank, and performing a stirring deplating operation to obtain the rack for deplating. Compared with the existing technology, the present invention does not need to heat up and energize, and can quickly remove the nickel coating of the rack by immersing at room temperature. The cost is in line with the purpose of environmental protection and saving that is required by the society.

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 Patents(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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