Alkaline zinc-nickel alloy electroplating solution with high stability

A high-stability, nickel-alloy technology, applied in the field of electroplating, can solve problems such as current efficiency drop, and achieve the effects of reduced adsorption, high corrosion resistance, and low brittleness

Inactive Publication Date: 2016-01-13
GUANGZHOU ULTRA UNION CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention proposes a highly stable alkaline zinc-nickel alloy electroplating solution, which solves the problem that the current efficiency of the current alkaline zinc-nickel alloy electroplating solution is continuously decreasing

Method used

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  • Alkaline zinc-nickel alloy electroplating solution with high stability
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  • Alkaline zinc-nickel alloy electroplating solution with high stability

Examples

Experimental program
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Effect test

Embodiment 1

[0015] Alkaline zinc-nickel alloy rack plating process of the present invention is as follows:

[0016]

[0017] The alkaline zinc-nickel alloy plating solution described in the above process is prepared by the following method: add 120 g of sodium hydroxide to 500 g of water, then add 10 g of zinc oxide, stir to dissolve it, and this solution is A solution. Add 5g of nickel sulfate to 50g of water, stir to dissolve it, then add 8g of triethylenetetramine and 25g of triethanolamine, stir evenly, this solution is B solution. Add liquid B to liquid A and stir well. After cooling the plating solution, add 4mL of brightener and 10mL of auxiliary agent, and then add water to 1000mL.

[0018] The brightener is prepared by the following method: dissolve 30-60g of sodium metabisulfite in 750mL of water, then add 30-60g of 4-methoxybenzaldehyde, stir to dissolve, and then add 30-60g of sodium toluenesulfonate 1. Propanesulfonic acid pyridinium salt 30-60g, butyl etherate 10-50g an...

Embodiment 2

[0023] Alkaline zinc-nickel alloy barrel plating process of the present invention is as follows:

[0024]

[0025] The alkaline zinc-nickel alloy plating solution described in the above process is prepared by the following method: add 130 g of sodium hydroxide to 500 g of water, then add 11 g of zinc oxide, and stir to dissolve it. This solution is A solution. Add 5.5 g of nickel sulfate to 50 g of water, stir to dissolve it, then add 10 g of triethylenetetramine and 20 g of triethanolamine, and stir evenly. This solution is B liquid. Add liquid B to liquid A and stir well. After cooling the plating solution, add 6mL of brightener and 15mL of auxiliary agent, and then add water to 1000mL.

[0026] The preparation of the brightener and auxiliary agent described in this embodiment is the same as that in Example 1.

[0027] The prepared zinc-nickel alloy coating has less brittleness, greater adhesion and high corrosion resistance.

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Abstract

The invention discloses an alkaline zinc-nickel alloy electroplating solution with high stability. The alkaline zinc-nickel alloy electroplating solution comprises 8-12 g / L of zinc oxide, 4.8-10 g / L of nickel sulfate, 115-135 g / L of sodium hydroxide, 5-15 g / L of triethylene tetramine, 15-30 g / L of triethanolamine, 2-6 mL / L brightening agents and 8-15 mL / L of additives. The brightening agents comprise sodium toluene sulphonate. The additives are composed of sodium toluene sulphonate, polyvinyl alkylimine, polyethylene-polyamine and epoxy chloropropane condensation compounds, sodium 2-ethylhexyl sulfate and sodium metavanadate. According to the alkaline zinc-nickel alloy electroplating solution, the cosolvent, namely the sodium toluene sulphonate is adopted, so that the solubility of additive decomposition products in the electroplating solution is improved, and the impurity adsorption quantity on the surface of a plated part and the impurity inclusion quantity in a plating layer are reduced. Besides, the brightening agents and the additives are reasonably selected and combined, so that the performance of the electroplating solution and the performance of the plating layer are improved, the current efficiency of the electroplating solution is stable, and the plating layer is low in brittleness, large in adhesive force and high in corrosion resistance.

Description

technical field [0001] The invention relates to the field of electroplating, in particular to a highly stable alkaline zinc-nickel alloy electroplating solution. Background technique [0002] The alkaline zinc-nickel alloy coating has high corrosion resistance. When the nickel content is 10% to 15%, its corrosion resistance is equivalent to that of the cadmium coating, or even better than that of the cadmium coating. Alkaline zinc-nickel alloy electroplating has been widely used instead of cadmium cyanide plating, and has achieved good environmental and social benefits. In the research and production application of more than 20 years, although the alkaline zinc-nickel alloy electroplating process has made great progress, the shortcomings of the process, such as low current efficiency and low stability of the plating solution, have not been resolved. In actual production, the current efficiency of the plating solution can reach more than 60% when the tank is just opened, whi...

Claims

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Application Information

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IPC IPC(8): C25D3/56
Inventor 郭崇武赖奂汶
Owner GUANGZHOU ULTRA UNION CHEM LTD
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