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Tin-zinc alloy electroplating method

A zinc alloy and plating solution technology, applied in electrolysis process, electrolysis components, cells, etc., can solve the problems of cyanide system pollution, poor coating quality, hexavalent chromium can not be naturally degraded, etc., to reduce pollution and strong corrosion resistance Effect

Inactive Publication Date: 2012-08-15
东莞市闻誉实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of hexavalent chromium plating are also obvious: the cathode current efficiency of chromium plating is extremely low, only 8% to 16%, and a large amount of hydrogen is precipitated to form acid mist, which is harmful to the environment and the health of workers; hexavalent chromium cannot be degraded naturally , it accumulates in organisms and human body, causing long-term harm
The cyanide system is seriously polluted and the plating solution is unstable, resulting in poor coating quality

Method used

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  • Tin-zinc alloy electroplating method
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  • Tin-zinc alloy electroplating method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] After the steel plate is pretreated, use the following plating bath, the temperature of the plating bath is 15°C, the stirring speed of the plating solution is 10m / min, and the cathode current density is 50A / dm 2 Electroplating treatment is carried out under certain conditions.

[0039]

Embodiment 2

[0041] After the steel plate is pretreated, use the following plating bath, the temperature of the plating bath is 20°C, the stirring speed of the plating solution is 10m / min, and the cathode current density is 100A / dm 2 Electroplating treatment is carried out under certain conditions.

[0042]

Embodiment 3

[0044] After the pretreatment of the steel plate, use the following plating bath, the temperature of the plating bath is 25°C, the stirring speed of the plating solution is 50m / min, and the cathode current density is 5A / dm 2 Electroplating treatment is carried out under certain conditions.

[0045]

[0046]

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Abstract

The invention aims to provide a tin-zinc alloy electroplating method. The method is performed under the following conditions: plating bath temperature: 15-25 DEG C; plating solution stirring speed: 50-200m / min; and cathodic current density: 5-100A / dm2. The tin-zinc alloy electroplating method is obtained by selection of a plating bath temperature, a cathode current density and the like and the use of a specific tin-zinc alloy plating bath, and the tin-zinc alloy plating obtained using the method has strong corrosion resistance and reduced pollution, and is an ideal substitute for cadmium plating.

Description

technical field [0001] The invention relates to a tin-zinc alloy electroplating method. Background technique [0002] Electroplating is the process of plating a thin layer of other metals or alloys on the surface of certain metals using the principle of electrolysis. It is a process of using electrolysis to attach a layer of metal film to the surface of metal or other material parts to prevent corrosion and improve Abrasion resistance, conductivity, light reflection and aesthetic enhancement. [0003] A technology that uses electrolysis to deposit a metal coating with good adhesion but different properties from the base material on mechanical products. The electroplating layer is uniform than the hot-dip layer, and is generally thinner, ranging from a few microns to tens of microns. Through electroplating, decorative protection and various functional surface layers can be obtained on mechanical products, and workpieces that are worn and processed incorrectly can also be re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/56C25D3/60C25D5/00C25D21/12
Inventor 叶伟炳
Owner 东莞市闻誉实业有限公司
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