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Method for preparing super-hydrophobic nickel/silicon carbide composite coating on metal surface

A metal surface, composite coating technology, applied in coatings, electrolytic coatings, cells, etc., can solve problems affecting anti-corrosion, self-cleaning and anti-icing, and achieve anti-freezing water resistance, cost reduction, and good coating wear resistance Effect

Inactive Publication Date: 2019-03-26
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] As mentioned above, nickel metal is widely used in electrical, aviation, aerospace and other industrial fields, but due to its hydrophilicity, it affects its anti-corrosion, self-cleaning and anti-icing properties

Method used

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  • Method for preparing super-hydrophobic nickel/silicon carbide composite coating on metal surface
  • Method for preparing super-hydrophobic nickel/silicon carbide composite coating on metal surface

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The method for preparing a superhydrophobic nickel / silicon carbide composite coating on a metal surface, the specific steps are as follows:

[0031] Polish the copper sheet workpiece with 400 mesh, 800 mesh and 1200 mesh sandpaper first, then ultrasonically clean it with absolute ethanol for 10 minutes, and finally wash it with pure water, dry it, and set it aside.

[0032] Put 260g / L of nickel sulfate, 40g / L of nickel chloride, 40g / L of boric acid and 5g / L of saccharin into a container, add distilled water, stir well and shake evenly, and use it as the basic electroplating solution.

[0033] Put nickel powder (250nm) and silicon carbide powder (50nm) into the ball mill at a ratio of 5:1, the ball milling speed is 200rpm, the ball-to-material ratio is 4:1, the ball milling time is 4h, and the mixed powder is added Into the electroplating solution, the concentration is 2g / L, stir with a magnetic stirrer at 100 rpm for 30min.

[0034] The treated copper sheet is used as ...

Embodiment 2

[0036] The method for preparing a superhydrophobic nickel / silicon carbide composite coating on a metal surface, the specific steps are as follows:

[0037] Polish the copper sheet workpiece with 400 mesh, 800 mesh and 1200 mesh sandpaper first, then ultrasonically clean it with absolute ethanol for 10 minutes, and finally wash it with pure water, dry it, and set it aside.

[0038] Put 260g / L of nickel sulfate, 40g / L of nickel chloride, 40g / L of boric acid and 5g / L of saccharin into a container, add distilled water, stir well and shake evenly, and use it as the basic electroplating solution.

[0039] Put nickel powder (250nm) and silicon carbide powder (50nm) into the ball mill at a ratio of 5:1, the ball milling speed is 200rpm, the ball-to-material ratio is 4:1, the ball milling time is 4h, and the mixed powder is added Into the electroplating solution, the concentration is 4g / L, stir with a magnetic stirrer at 100 rpm for 30min.

[0040] The treated copper sheet is used as ...

Embodiment 3

[0042] The method for preparing a superhydrophobic nickel / silicon carbide composite coating on a metal surface, the specific steps are as follows:

[0043] Polish the stainless steel workpiece with 400-mesh, 800-mesh and 1200-mesh sandpaper, then ultrasonically clean it with absolute ethanol for 10 minutes, and finally wash it with pure water, dry it, and set it aside.

[0044] Put 260g / L of nickel sulfate, 40g / L of nickel chloride, 40g / L of boric acid and 5g / L of saccharin into a container, add distilled water, stir well and shake evenly, and use it as the basic electroplating solution.

[0045] Put nickel powder (250nm) and silicon carbide powder (50nm) into the ball mill at a ratio of 5:1, the ball milling speed is 200rpm, the ball-to-material ratio is 4:1, the ball milling time is 4h, and the mixed powder is added Into the electroplating solution, the concentration is 6g / L, stir with a magnetic stirrer at 100 rpm for 30min.

[0046] The treated copper sheet is used as the...

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Abstract

The invention discloses a method for preparing a super-hydrophobic nickel / silicon carbide composite coating on a metal surface. The method comprises the following steps: putting a solvent containing 240-280g / L of nickel sulphate, 40-60g / L of nickel chloride, 40-60g / L of boric acid and 5-10g / L of saccharin into a container, adding distilled water, controlling the temperature to be 40-65 DEG C, sufficiently stirring and shaking uniformly, adding ammonia water to control the pH value to 3.8-4.5, thereby obtaining a base electroplating solution; putting nickel powder and silicon carbide in a proportion of 5 to 1 into a ball mill to mix, taking and adding 2-20g / L of mixed powder into the electroplating solution; taking conductive metal such as stainless steel and copper as a cathode, taking pure nickel or graphite carbon as an anode, and electroplating in an environment with vertical magnetic fields; and cleaning a plated workpiece with distilled water after electroplating is completed, performing blow-drying, thereby obtaining a nickel / silicon carbide composite coating with a super-hydrophobic function on the surface of the metal workpiece. The electroplating solution is simple in component, is convenient in preparation, and is stable enough in processing process; and the prepared coating has a contact angle of 150-160 degrees, and has a rolling angle smaller than 10 degrees.

Description

technical field [0001] The invention relates to an electrodeposition processing technology, in particular to a method for preparing a superhydrophobic nickel / silicon carbide composite coating on a metal surface. Background technique [0002] Superhydrophobic surface generally means that the contact angle of water is greater than 150°, and the rolling angle is less than 10°. There are many superhydrophobic phenomena in nature, such as the surface of lotus leaves, the wings of cicadas and butterflies, etc., all have obvious superhydrophobic properties. The superhydrophobic surface has important characteristics such as waterproof, anti-fog, anti-snow, anti-pollution, anti-oxidation, anti-corrosion and self-cleaning, etc., and has extremely broad application prospects in many fields such as scientific research, production, and life. Superhydrophobic technology is also of great practical significance for anti-corrosion, anti-rust and anti-fouling in the construction industry, au...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D5/08C25D3/56C25D15/00B22F9/04C25D21/12
Inventor 沈理达徐铭阳王开
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS