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Regeneration method of nickel electroplating solution

A technology of nickel electroplating solution and electroplating solution, which is applied in electrolysis process, electrolytic components, cells, etc., can solve the problems of pH value change of nickel electroplating solution, inaccurate ratio of nickel electroplating solution, and influence on production stability, etc., to reduce preparation cost, reduce environmental pollution, and prolong service life

Active Publication Date: 2014-07-23
LUOYANG WEIXIN ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But for dissolved copper, this method is not applicable
[0015] At present, the method for removing impurities in the prior art is generally a chemical method, but this method often introduces new impurity components when removing Cu2+, Zn2+, Pb2+, Cr3+ ions, causing the pH value of the nickel electroplating solution to change. The ratio of the treated nickel plating solution is inaccurate, which affects the stability of production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A nickel-containing electroplating waste solution is basically composed of nickel chloride, triethanolamine complexing agent, boric acid, sodium allyl sulfonate, magnesium sulfate and brightener in a certain proportion, and the rest is water. After use, the Cu of the plating solution 2+ 、Cr 3+ , Zn 2+ , Fe2+ , Pb 2+ The ion concentrations are 5, 6, 65, 30, and 8 mg / L respectively, which cannot be used normally.

[0033] Add commercially available D001 macroporous strongly acidic styrene-based resin to three volumes of 6% sulfuric acid solution for regeneration treatment for 2 hours to convert the sodium-type resin into a hydrogen-type strongly acidic cation exchange resin, and then wash with pure water Remove the acid solution and let it dry.

[0034] The obtained hydrogen-type strongly acidic cation exchange resin was replaced by nickel in a saturated nickel chloride solution for 2 hours, the volume ratio of the resin to the saturated nickel chloride solution was ...

Embodiment 2

[0040] A nickel-containing exchange resin regenerated electroplating waste solution is basically composed of nickel chloride, nickel sulfate, boric acid, sodium allyl sulfonate, saccharin and brightener in a certain proportion, and the rest is water. After use, the Cu of the plating solution 2+ 、Cr 3+ , Zn 2+ , Fe 2+ , Pb 2+ The ion concentrations are 8, 2, 30, 28, 3mg / L respectively, which cannot be used normally.

[0041] Add the D001-CC macroporous strongly acidic styrene-based cation exchange resin of Tianjin Bohong Building Materials Chemical Resin Co., Ltd. to 2 times the volume of 15% sulfuric acid solution for regeneration treatment for 3 hours to convert the sodium resin into hydrogen Type strong acidic cation exchange resin, then wash away the acid solution with pure water, and let it dry on the surface.

[0042] The obtained hydrogen-type strongly acidic cation exchange resin was replaced with nickel in a saturated nickel chloride solution for 2 hours, the vol...

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PUM

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Abstract

The invention discloses a regeneration method of a nickel electroplating solution, which comprises the steps of regeneration of cation exchange resin acid solution, replacement of resin nickel, replacement of electroplating solution, regeneration of nickel exchange resin, and adjustment of electroplating solution proportion. According to the method, the nickel exchange resin is prepared and used for exchanging Cu<2+>, Cr<3+>, Zn<2+>, Fe<2+> and Pb<2+> in the waste solution, and the proportion is adjusted to obtain the acceptable electroplating solution. The method can reutilize the abandoned trivalent-chromium electroplating solution, thereby lowering the cost, prolonging the service life nickel the electroplating solution and reducing the environmental pollution. No other impurity ions are introduced in the process, thereby avoiding generating negative influence on the electroplating solution. After the proportion of the electroplating solution is adjusted, the service life can reach more than 70% of that of the newly prepared electroplating solution, but the cost is only 30% of the newly prepared electroplating solution.

Description

technical field [0001] The invention relates to an electroplating technology, in particular to a regeneration method of a nickel electroplating solution. Background technique [0002] Electroplating is an electrochemical process as well as a redox process. The basic process of electroplating is to immerse the part in a solution of metal salt as the cathode, and the metal plate as the anode, and then deposit the desired coating on the part after connecting to a DC power supply. [0003] Obtaining the desired coating on the surface of the workpiece is the core process of electroplating. The quality of this process directly affects the various properties of the coating. Due to the mature process and technology, electroplating occupies the first place in metal finishing in terms of tonnage. The development of electroplating is divided into three periods. The first period is to improve gloss or corrosion resistance. The second period is to move towards victory and automation du...

Claims

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Application Information

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IPC IPC(8): C25D21/22
Inventor 尤逸民
Owner LUOYANG WEIXIN ELECTRONICS TECH