Electroplating method for carbon nano-tube/cobalt-phosphorus composite coating with characteristics of high hardness, corrosion resistance, wear resistance and low friction coefficient

A low friction coefficient, carbon nanotube technology, used in coatings, electrolytic coatings, etc., can solve the problem of not considering the corrosion resistance of the coating, the corrosion resistance of the coating cannot be satisfied, and the corrosion resistance of the coating is not ideal. and other problems, to achieve the effect of low cost, small investment, excellent wear resistance and anti-friction 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

[0006] However, the above method does not consider the corrosion resistance of the prepared coating, and the corrosion resistance of the prepared coating is not ideal.
However, in practical applications, corrosion of materials is ubiquitous, and the performance of the coating prepared by the above method in terms of corrosion resistance cannot meet the requirements of practical applications.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A kind of preparation method of carbon nanotube / cobalt composite coating, concrete steps are as follows:

[0026] Modification treatment of carbon nanotubes includes: purification: put a certain amount of carbon nanotubes in a solution mixed with concentrated sulfuric acid (volume concentration 98%) and concentrated nitric acid (volume concentration 37%) at a volume ratio of 3:1, and reflux at 80°C for 2 hours , and then vacuum dried; sensitization: the purified carbon nanotubes in 10g / LSnCl 2 2H 2 Sensitization treatment in O+40g / LHCl solution for 30min; activation: put the sensitized carbon nanotubes in 0.5g / LPdCl 2 Activation treatment in solution (containing 1.0ml concentrated hydrochloric acid) for 30min. Ultrasonic waves are used for thorough dispersion in each process.

[0027] Configuration prepares the electroplating solution of carbon nanotube / cobalt composite coating, and its composition is to comprise in every liter of plating solution: cobalt sulfate 60g...

Embodiment 2

[0030] A kind of preparation method of carbon nanotube / cobalt composite coating, concrete steps are as follows:

[0031] Modification treatment of carbon nanotubes includes: purification: put a certain amount of carbon nanotubes in a solution mixed with concentrated sulfuric acid and concentrated nitric acid at a volume ratio of 1:1, reflux at 80°C for 10 hours, and then vacuum dry; sensitization: purify carbon nanotubes in 10g / LSnCl 2 2H 2 Sensitization treatment in O+40g / LHCl solution for 30min; activation: put the sensitized carbon nanotubes in 0.5g / LPdCl 2 Activation treatment in solution (containing 1.0ml concentrated hydrochloric acid) for 30min. Ultrasonic waves are used for thorough dispersion in each process.

[0032]Configure the electroplating solution for preparing carbon nanotube / cobalt composite coating. Its components include: cobalt sulfate 20g, sodium dihydrogen phosphate 30g, sodium chloride 50g, boric acid 10g, sodium dodecylbenzenesulfonate in every lite...

Embodiment 3

[0035] A kind of preparation method of carbon nanotube / cobalt composite coating, concrete steps are as follows:

[0036] Modification treatment of carbon nanotubes includes: purification: put a certain amount of carbon nanotubes in a solution mixed with concentrated sulfuric acid and concentrated nitric acid at a volume ratio of 3:1, reflux at 80°C for 8 hours, and then vacuum dry; sensitization: purify carbon nanotubes in 10g / LSnCl 2 2H 2 Sensitization treatment in O+40g / LHCl solution for 30min; activation: put the sensitized carbon nanotubes in 0.5g / LPdCl 2 Activation treatment in solution (containing 1.0ml concentrated hydrochloric acid) for 30min. Ultrasonic waves are used for thorough dispersion in each process.

[0037] Configuration prepares the electroplating solution of carbon nanotube / cobalt composite coating, and its composition is to comprise in every liter of plating solution: cobalt sulfate 40g, sodium dihydrogen phosphate 50g, sodium chloride 70g, boric acid ...

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Abstract

The present invention relates to an electroplating preparation method for a carbon nano-tube/cobalt-phosphorus composite coating with characteristics of high hardness, corrosion resistance, wear resistance and low friction coefficient. According to the electroplating preparation method, a platinum net is adopted as an anode, a work-piece requiring plating is adopted as a cathode, a mixed solution containing 20-60 g/l of a cobalt salt, 2-10 g/l of carbon nano-tubes, 30-70 g/L of sodium dihydrogen phosphate, 50-100 g/l of a sodium salt, 10-30 g/l of boric acid, 1-4 g/l of saccharin, 0.01-0.2 g/l of a surfactant, 10-100 g/l of a complexing agent, and the balance of distilled water is adopted as an electroplating solution, electroplating is performed after the electroplating solution is subjected to an ultrasonic vibration treatment, and the carbon nano-tubes are further subjected to a sensitization activation treatment. The prepared carbon nano-tube/cobalt-phosphorus composite coating has characteristics of high hardness, excellent wear resistance, low friction coefficient, excellent corrosion resistance and simple preparation method, and is widely used in the fields of automotives, machinery, precision manufacturing and aerospace.

Description

technical field [0001] The invention relates to the technical field of electroplating, in particular to an electroplating method for a carbon nanotube / cobalt-phosphorus composite coating with high hardness, corrosion resistance, wear resistance and low friction coefficient. Background technique [0002] With the rapid development of modern automobile industry, machinery industry, aviation and aerospace industry, more and more high-load cylinder pistons and sliding parts are used under the action of dry friction, hydraulic pressure and lubricating oil medium. Electroplating coating materials with high hardness, high temperature resistance, corrosion resistance and fatigue wear resistance on the surface of sliding parts can greatly improve the service life of equipment and increase economic costs. [0003] Carbon nanotubes (CNTs) have attracted much attention because of their unique structures and properties. Many studies have shown that CNTs are ideal functional and reinforci...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D15/00
Inventor 林永峰
Owner WUXI XINSANZHOU STEEL
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