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Electroplating solution for zinc plating and preparation method therefor

An electroplating solution and plating solution technology, applied in the field of galvanizing electroplating solution and its preparation, can solve the problems of heavy odor, many organic inclusions in the coating layer, poor corrosion resistance, etc., and achieve simple maintenance and operation of the plating solution, reduce the difficulty of wastewater treatment, and reduce the The effect of production costs

Active Publication Date: 2020-01-14
GUANGZHOU SANFU NEW MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these three generations of main brighteners are all insoluble in water, and a large amount of surfactants are required for solubilization during use. The obtained coating has many inclusions of organic matter and poor corrosion resistance. The environment is a burden, and the application in production is limited

Method used

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preparation example Construction

[0036] The present invention also provides a kind of preparation method of galvanized electroplating solution, comprises the following steps:

[0037] (1) Preparation of the main brightener solution: dissolve the brightener methoxy-o-chlorobenzaldehyde in water, then add the carrier sodium nonylphenol polyoxyethylene ether sulfonate, stir and dissolve, and obtain the main brightener solution ;

[0038] (2) Preparation of softener solution: 2-naphthalenesulfonic acid formaldehyde polymer sodium salt is dissolved in water, then add sodium benzoate and sodium sulfonate, stir and dissolve to obtain softener solution;

[0039] (3) Preparation of plating solution: Add zinc chloride and boric acid to water, heat and stir to dissolve, then add potassium chloride, let it cool after dissolving; add zinc powder and active peptide for treatment, filter and take the filtrate to add to the step The main light agent solution obtained in (1) and the softening agent solution obtained in step ...

Embodiment 1

[0047] A preparation method for galvanized electroplating solution, comprising the following steps:

[0048] 1. Preparation of main light agent solution

[0049] Dissolve 100g of methoxy-o-chlorobenzaldehyde in 500mL of water, then add 15g of sodium nonylphenol polyoxyethylene ether sulfonate, stir to dissolve, and then add water to 1000mL to obtain the main light agent solution as a spare.

[0050] 2. Preparation of softener solution

[0051]Dissolve 30g of 2-naphthalenesulfonic acid formaldehyde polymer sodium salt in 500mL of water, then add 120g of sodium benzoate and 60g of sulfonic acid sodium salt, stir until the solid matter is completely dissolved, then add water to 1000mL to obtain a softener solution for use as a spare.

[0052] 3. Preparation of plating solution

[0053] Add 80g of zinc chloride and 50g of boric acid into 500mL of water, heat to 60°C, stir to dissolve, then add 300g of potassium chloride, add water to 900mL and let it cool down; add 1g of zinc po...

Embodiment 2

[0055] A preparation method for galvanized electroplating solution, comprising the following steps:

[0056] 1. Preparation of main light agent solution

[0057] Dissolve 100g of methoxy-o-chlorobenzaldehyde in 500mL of water, then add 15g of sodium nonylphenol polyoxyethylene ether sulfonate, stir to dissolve, and then add water to 1000mL to obtain the main light agent solution as a spare.

[0058] 2. Preparation of softener solution

[0059] Dissolve 30g of 2-naphthalenesulfonic acid formaldehyde polymer sodium salt in 500mL of water, then add 120g of sodium benzoate and 60g of sulfonic acid sodium salt, stir until the solid matter is completely dissolved, then add water to 1000mL to obtain a softener solution for use as a spare.

[0060] 3. Preparation of plating solution

[0061] Add 60g of zinc chloride and 30g of boric acid into 500mL of water, heat to 60°C, stir to dissolve, then add 250g of potassium chloride, add water to 900mL and let it cool down; add 1g of zinc p...

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Abstract

The invention relates to an electroplating solution for zinc plating. The electroplating solution comprises the following components: 20 g / L-80 g / L of zinc chloride, 200 g / L-300 g / L of potassium chloride, 20 g / L-50 g / L of boric acid, 0.3 mL / L-3 mL / L of major brightening agent and 20 mL / L-35 mL / L of softening agent; the major brightening agent can be prepared from an aqueous solution of a carrier and a brightening agent; and the softening agent is prepared from an aqueous solution of a dispersing agent and a diffusing agent. The electroplating solution for zinc plating can increase the glossiness and the depth of a plating, and meanwhile, organic impurities and the smell of the electroplating solution are reduced, and the wastewater treatment difficulty is lowered, so that the electroplating solution becomes simple to maintain and operate, and production cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of electroplating, and in particular relates to a galvanized electroplating solution and a preparation method thereof. Background technique [0002] Since the 1980s, the potassium chloride galvanizing process has been widely used in production due to its high current efficiency, good coating brightness, easy treatment of heavy metal ions in wastewater, and direct electroplating on various substrates. The application is more and more extensive. However, in the traditional potassium chloride galvanizing process, a large amount of surfactants and co-solvents are often used to improve the solubility of the main light agent components, resulting in difficult cleaning of the coating after plating, many organic inclusions, poor adhesion of the passivation film and easy discoloration , The production wastewater has high content of surfactants, many foams, chemical oxygen demand (COD) exceeds the standard, and the p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/22
CPCC25D3/22
Inventor 邓正平胡明孟祥举
Owner GUANGZHOU SANFU NEW MATERIALS TECH
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