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An efficient and environment-friendly cyanide-free sulfate zinc plating solution

A sulfate and solution technology, applied in the field of cyanide-free sulfate zinc plating solution, can solve problems such as poor solubility and poor salt resistance, and achieve the effect of overcoming poor solubility and improving electroplating quality.

Active Publication Date: 2018-11-06
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to propose a highly efficient and environmentally friendly cyanide-free sulfate zinc plating solution, so as to overcome the disadvantages of poor solubility in water or poor salt tolerance of traditional brighteners and improve the quality of electroplating

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] The formulation of the electroplating solution is as follows: zinc sulfate: 225g / L; sodium sulfate: 55g / L; aluminum sulfate: 25g / L; alkyl glycoside: 5g / L.

[0013] Coating performance test results: The coating is smooth in appearance, showing a semi-bright, slightly bluish silvery white, with fine and uniform crystallization, and no defects such as zinc bumps, burrs, bubbling, and cracks. After passivation treatment, the appearance color is different, mainly iridescent, blue and white, olive, blue, yellow and so on. The coating thickness is controllable, and the plating speed is 0.4-0.6 μm / min. Steel parts are galvanized according to this process, and the thickness of the coating is 8-12 μm. After passivation, the cross-cut test is carried out according to GB_T 9286-1998 to check the brittleness of the galvanized layer. The experimental results are graded from 0 to 1. Steel parts are galvanized according to this process, and the thickness of the coating is 8-12 μm. Af...

Embodiment 2

[0015] The formulation of the electroplating solution is as follows: zinc sulfate: 250g / L; sodium sulfate: 70g / L; aluminum sulfate: 25g / L; alkyl glycoside: 5g / L; glucose: 5g / L; auxiliary brightener: 0.2g / L.

[0016] The auxiliary brightener is sodium dodecylbenzenesulfonate.

Embodiment 3

[0018] The formulation of the electroplating solution is as follows: zinc sulfate: 300g / L; sodium sulfate: 100g / L; aluminum sulfate: 30g / L; alkyl glycoside: 5g / L; glucose: 5g / L; vanillin: 0.4g / L; Brightener: 0.5g / L.

[0019] The auxiliary brightener is a mixture of sodium dodecylbenzenesulfonate and sodium benzoate, which is formed by mixing sodium dodecylbenzenesulfonate and sodium benzoate with a mass ratio of 1:2.

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Abstract

The invention belongs to the electroplating technology, and relates to an efficient and environment-friendly cyanide-free sulfate galvanization solution. The efficient and environment-friendly cyanide-free sulfate galvanization solution is characterized in that the solute includes zinc sulfate, sodium sulfate, aluminum sulfate and a main brightener, and the solvent is water. The efficient and environment-friendly cyanide-free sulfate galvanization solution provided by the invention overcomes the defect that a traditional brightener is poor in solubility or salt tolerance, and improves the electroplating quality.

Description

technical field [0001] The invention belongs to electroplating technology, and relates to a highly efficient and environment-friendly cyanide-free sulfate zinc plating solution. Background technique [0002] Sulfate galvanizing is one of the more commonly used cyanide-free galvanizing processes at present. It is characterized by simple solution composition, stable performance, high current efficiency, fast deposition speed, and low corrosion to equipment. It is mainly used for electroplating of wire and plate . The sulfate galvanizing solution is usually composed of zinc sulfate, conductive salt (sodium sulfate, magnesium sulfate, etc.), pH buffer (boric acid, aluminum sulfate) and organic additives. Among them, organic additives are generally divided into three categories: the first category usually refers to the main brightener, such as aromatic sulfonamide, thiourea, benzylidene acetone, glucose and quaternary ammonium salt, etc.; the second category refers to the leveli...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D3/22
CPCC25D3/22
Inventor 张骐詹中伟孙志华彭超汤智慧宇波
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS