Process for pulse electroplating of zinc-nickel alloy through ytterbium-containing electrolyte

A technology for pulse electroplating and electroplating of zinc-nickel, which is applied in the field of zinc-nickel alloy electrolyte, can solve problems such as harmfulness of multilayer films, and achieve the effects of high compactness, reduced production process links, and high comprehensive performance.

Inactive Publication Date: 2014-05-21
WUXI XINSANZHOU STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005]Because the deposition of zinc-nickel alloy belongs to abnormal co-deposition, the traditional view is that when the nickel content in the zinc-nickel alloy coating reaches 13%, the coating has the best corrosion resistance , so the main problem solved by conventional zinc-nickel alloy additives is to try to control the nickel content in the coating to around 13% in the abnormally co-deposited zinc-nickel alloy electrolyte. is harmful

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The specific steps are: before the steel plate is electroplated, the parts are polished and washed with water, degreased, then washed with water, rust removed, put into the electroplating bath after washing, and the electrolyte is stirred or left standing, After electrolysis, the parts are taken out from the electrolytic solution, washed with water, and dried. The pH value of the plating solution is 3.5, the power supply mode of plating is pulse output power supply, the temperature is room temperature, and the time is 25 minutes.

[0021] The electroplating power supply mode is output pulse power supply, and the specific parameters are: control the average current density to 0.4A / dm 2 , The duty cycle of the first pulse is 0.01, the working time is 10s, the duty cycle of the second pulse is 0.2, the working time is 20s, the average output current of the reverse pulse is 0.2A / dm 2 , the duty cycle is 0.1, the working time is 5s; the temperature is room temperature.

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Embodiment 2

[0024] The surface electroplating method of the nut comprises that the nut is polished and washed with water and degreased before the electroplating, then washed with water, derusted, put into the electroplating solution of the electroplating tank after being washed with water, and the electrolytic solution is stirred Or let it stand still, and after electrolysis, take out the parts from the electrolyte, wash them with water, and dry them. The pH value of the plating solution is 3.5, the power supply mode of plating is pulse output power supply, the temperature is room temperature, and the time is 20 minutes.

[0025] The electroplating power supply mode is output pulse power supply, and the specific parameters are: control the average current density to 0.8A / dm 2 , The duty ratio of the first pulse is 0.1, the working time is 30s, the duty ratio of the second pulse is 0.4, the working time is 60s, the average current of reverse pulse output is 0.4A / dm 2 , the duty cycle is 0.2...

Embodiment 3

[0028] The surface electroplating method of the pump chamber lining comprises: before the pump chamber lining is electroplated, the parts are polished and washed with water, degreased, then washed with water, rust removed, put into the electroplating tank electroplating solution after being washed with water, and The electrolytic solution is stirred or left to stand, and after electrolysis, parts are taken out of the electrolytic solution, washed with water, and dried. The pH value of the plating solution is 3.5, the power supply mode of plating is pulse output power supply, the temperature is room temperature, and the time is 30 minutes.

[0029] The electroplating power supply mode is output pulse power supply, and the specific parameters are: control the average current density to 0.6A / dm 2 , The duty cycle of the first pulse is 0.05, the working time is 20s, the duty cycle of the second pulse is 0.3, the working time is 40s, the average output current of the reverse pulse ...

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Abstract

The present invention relates to a process for pulse electroplating of a zinc-nickel alloy through a ytterbium-containing electrolyte, wherein the electroplating electrolyte is a zinc-nickel alloy electrolyte, and contains 1-2 g / L of ytterbium chloride or 1.5-3 g / L of ytterbium nitrate as an additive, and the power supply manner of the electroplating is output pulse power supply. With the electroplating process, the zinc-nickel alloy nanometer multilayer film improved by plating ytterbium on the plated part surface has characteristics of high hardness, high corrosion resistance, high wear resistance, high high-temperature oxidation resistance, high compactness and high comprehensive performance. In addition, the electroplating process and the electrolyte have advantages of no requirement of post-plating treatment process, cost saving, efficiency, rapidness and convenient operation.

Description

technical field [0001] The invention relates to a zinc-nickel alloy electrolytic solution, which is used for pulse electroplating a zinc-nickel alloy electroplating process with an ytterbium-containing electrolytic solution on the surface of iron and steel parts. Background technique [0002] Corrosion and anti-corrosion are related to economic development and people's life safety. Surface engineering technology is the most economical and effective means and method to solve the corrosion and protection of mechanical parts and materials. With the rapid development of modern industry and science and technology, the performance requirements for mechanical parts and material surfaces are getting higher and higher, and surface treatment technology has also developed rapidly. Surface engineering technology can use chemical, physical or electrochemical methods to treat the surface of parts or materials to form various protective layers on the surface and improve the service life of...

Claims

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Application Information

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IPC IPC(8): C25D5/18C25D3/56
Inventor 林永峰
Owner WUXI XINSANZHOU STEEL
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