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Preparation technology for dual-pulse electrodeposition based graphene/nickel based composite coating

A technology of composite coating and preparation process, which is applied in the direction of coating, electrolytic coating, etc., can solve the problems that graphene cannot be added and lubrication cannot be used to improve the friction and wear properties of carbon steel alloys, so as to achieve grain refinement and avoid direct Contact, evenly distributed effect

Inactive Publication Date: 2015-08-19
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing technology cannot add graphene to alloy carbon steel uniformly and stably, and the lubricating effect of graphene cannot be used to improve the friction and wear properties of carbon steel alloys

Method used

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  • Preparation technology for dual-pulse electrodeposition based graphene/nickel based composite coating
  • Preparation technology for dual-pulse electrodeposition based graphene/nickel based composite coating
  • Preparation technology for dual-pulse electrodeposition based graphene/nickel based composite coating

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Effect test

Embodiment 1

[0040] The present invention is based on the graphene / nickel-based composite coating preparation process of double-pulse electrodeposition, comprising the following steps:

[0041] 1) Grinding and cleaning the carbon structural steel plate; 2) mixing 20ml of concentrated sulfuric acid (98%wt), 5ml of phosphoric acid (85%wt) and 1g of graphite powder in an Erlenmeyer flask under ice-water bath conditions, to be mixed After uniformity, slowly add 5g of potassium permanganate, and the reaction lasts for 50-70 minutes in an ice-water bath; then raise the temperature of the water area to 30-40°C, enter a medium-temperature reaction, and continue for 20-40 minutes; then slowly add to the Erlenmeyer flask Solution volume is equal (about 25ml) deionized water, raise the temperature of water bath to 90-100 ℃ and react for 15-30min, the suspension gradually turns brown; add about 1 / 15 of the suspension volume ( The hydrogen peroxide (30%wt) of about 3ml) produces a large number of bubbl...

Embodiment 2

[0044] The present invention is based on the graphene / nickel-based composite coating preparation process of double-pulse electrodeposition, comprising the following steps:

[0045] 1) Grinding and cleaning the carbon structural steel plate; 2) mixing 20ml of concentrated sulfuric acid (98%wt), 5ml of phosphoric acid (85%wt) and 1g of graphite powder in an Erlenmeyer flask under ice-water bath conditions, to be mixed After uniformity, slowly add 6g of potassium permanganate, and the reaction lasts for 50-70 minutes in an ice-water bath; then raise the temperature of the water area to 30-40°C, enter a medium-temperature reaction, and continue for 20-40 minutes; then slowly add 2 times of Erlenmeyer flask Deionized water with the inner solution volume (about 46ml), raise the temperature of the water bath to 90-100°C and react for 15-30min, the suspension gradually turns brown; add dropwise about 1 / 13 of the suspension volume ( The hydrogen peroxide (30%wt) of about 6ml) produces ...

Embodiment 3

[0048] The present invention is based on the graphene / nickel-based composite coating preparation process of double-pulse electrodeposition, comprising the following steps:

[0049] 1) Grinding and cleaning the carbon structural steel plate; 2) mixing 20ml of concentrated sulfuric acid (98%wt), 5ml of phosphoric acid (85%wt) and 1g of graphite powder in an Erlenmeyer flask under ice-water bath conditions, to be mixed After uniformity, slowly add 6.25g of potassium permanganate, and the reaction lasts for 50-70 minutes in an ice-water bath; then raise the temperature of the water area to 30-40°C, enter a medium-temperature reaction, and continue for 20-40 minutes; then slowly add 1.5 times of conical The volume of the solution in the bottle (about 37ml) of deionized water, raise the temperature of the water bath to 90-100°C and react for 15-30 minutes, the suspension gradually turns brown; add about 1 / 10 of the volume of the suspension to the obtained suspension (about 7ml) of h...

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Abstract

The invention discloses a preparation technology for a dual-pulse electrodeposition based graphene / nickel based composite coating. The technology includes the steps of: subjecting a plated sample to sand paper grinding and polishing treatment, and conducting ultrasonic cleaning; preparing grapheme by a chemical reduction method or liquid phase plasma method; adding the prepared graphene into a plating solution, and preparing a graphene / nickel based composite coating by dual-pulse electrodeposition. The dual-pulse electrodeposition method adopts an intelligent multi-set commutation pulse electroplating power supply, the anode is a nickel plate, the cathode is a to-be-plated sample, and they are placed on the left and right, mechanical stirring is adopted for stirring in the electroplating process , and the content of graphene added into the plating solution is 0.05-0.4g / L. With the grapheme provided by the invention, the average grain size of the composite coating is reduced, and the composite coating hardness is greatly improved compared with the matrix and the pure Ni coating, and antifriction performance and wear resistance are excellent and can meet the performance requirement of carbon steel for frictional wear under different working conditions. The technology can be applied to aerospace, machinery, automobile and other fields.

Description

technical field [0001] The invention relates to the technical field of material surface modification, and provides a graphene / nickel-based composite coating preparation process based on double-pulse electrodeposition. Background technique [0002] In high-tech fields such as aerospace and aviation, with the continuous expansion of people's exploration scope, the requirements for lubrication technology are becoming more and more stringent. Due to a large amount of friction loss in aerospace vehicles, energy loss and system quality increase, making aerospace transportation capacity And the scope of exploration is limited, which requires that lubrication technology not only meet the requirements of working in extreme environments, but also meet the requirements of minimum friction loss, longest service life and minimum structure. In this context, it is particularly important to reduce friction and wear through appropriate methods to achieve the purpose of energy saving and emis...

Claims

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Application Information

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IPC IPC(8): C25D15/00C25D5/18C01B31/04
Inventor 陈娟娟李建亮熊党生何勇季钰涓张永康
Owner NANJING UNIV OF SCI & TECH
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