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Method for processing silicon carbide-nickel composite corrosion-resistant coating on surface of metal substrate

A technology for corrosion-resistant coatings and metal substrates, which can be applied to devices, coatings, and anti-corrosion coatings for coating liquid on the surface. It can solve problems such as the inability of nickel to grow, silicon carbide to conduct electricity, and limit processing, and achieve excellent strength and hardness. , Excellent heat resistance, the effect of improving heat resistance

Inactive Publication Date: 2021-06-04
CHANGCHUN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The electrodeposited nickel coating has excellent corrosion resistance due to its self-passivation ability, and has excellent strength and hardness; if the silicon carbide nanoparticle coating can be combined with the electrodeposited nickel coating, the corrosion resistance of the metal will be further enhanced; However, the temperature and potential during electrodeposition of nickel are insufficient to make SiC conductive, and Ni cannot grow directly on SiC coating, thus limiting the processing of SiC-Ni composite corrosion-resistant coatings.

Method used

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  • Method for processing silicon carbide-nickel composite corrosion-resistant coating on surface of metal substrate
  • Method for processing silicon carbide-nickel composite corrosion-resistant coating on surface of metal substrate
  • Method for processing silicon carbide-nickel composite corrosion-resistant coating on surface of metal substrate

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Embodiment 1

[0028] Such as figure 1 As shown, a method of processing a silicon carbide-nickel composite corrosion-resistant coating on the surface of a metal substrate in this embodiment, the metal substrate used is 40Cr steel, and the specific steps are as follows:

[0029] The surface of 40Cr steel was polished with 600 mesh, 1000 mesh, 1500 mesh, and 2000 mesh sandpaper in sequence, and then polished on a polishing machine until the surface of 40Cr steel was smooth. The 40Cr steel was ultrasonically cleaned in deionized water for 10 minutes, and then Dry in a drying oven at 50°C for 10 minutes;

[0030] Use a laser to process a number of mastoid protrusions with the same center distance on the smooth surface of the 40Cr steel, and form pits around the protrusions. Rinse the 40Cr steel with deionized water for 3-5 minutes, and then dry it in a drying oven at 50 °C 10min; the parameters of laser processing in this embodiment are: laser power 10w, spot diameter 50μm, laser wavelength 106...

Embodiment 2

[0035] The 40Cr steel of the silicon carbide-nickel composite corrosion-resistant coating that embodiment 1 makes is used scanning electron microscope as sample to carry out the microcosmic morphology characterization, specifically as follows image 3 (c), where image 3 (a) is a scanning electron microscope image of the metal substrate surface after laser processing; image 3 (b) is a scanning electron microscope image of the metal substrate surface self-assembled to form a silicon carbide nanoparticle coating after laser processing; from image 3 It can be seen in the figure that the silicon carbide nanoparticle coating is self-assembled in the pits on the smooth surface of 40Cr steel, and finally a nickel coating is formed on the silicon carbide nanoparticle coating after nickel electrodeposition; and then using the electrochemical workstation The performance test is carried out, the specific steps are: put the sample in the electric furnace and heat it at 600°C for 10 hou...

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Abstract

The invention discloses a method for processing a silicon carbide-nickel composite corrosion-resistant coating on a surface of a metal substrate. The method comprises the following steps of: primarily grinding the surface of the metal substrate, carrying out polishing until the surface of the metal substrate is smooth, and processing several mastoid bulges with completely consistent center distances on the smooth surface of the metal substrate by using laser; placing the metal substrate subjected to laser treatment in a silicon carbide nanoparticle-acetone turbid liquid, enabling the solution to be completely evaporated, and enabling the silicon carbide nanoparticles to be self-assembled in the pits in the smooth surface of the metal substrate to form a silicon carbide nanoparticle coating; and then electrically depositing nickel on the mastoid protrusions of the metal substrate, wherein in the electro-deposition process, the nickel is tiled and grows in the horizontal direction and is connected with one another to form a nickel coating covering the silicon carbide nanoparticle coating. Compared with the prior art, the coating processed on the surface of the metal substrate has the corrosion resistance of high-temperature damage resistance.

Description

technical field [0001] The invention relates to the technical field of corrosion-resistant surface coating processing, in particular to a method for processing a silicon carbide-nickel composite corrosion-resistant coating on the surface of a metal substrate. Background technique [0002] Metal plays an irreplaceable role in modern industrial production and daily life. Metals of various compositions are used in a wide variety of industries including automobiles, kitchen utensils, ships, the aerospace industry and medical devices. With the development of industrial modernization, people's requirements for the use performance and process performance of metals are constantly improving. The traditional metal surface properties can no longer meet the requirements of multifunctional composites. At present, the surface modification of metals has become a research hotspot. People put forward higher requirements for the performance of metal surfaces, especially for the properties of...

Claims

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Application Information

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IPC IPC(8): C25D3/12C25D5/34B05D1/18C21D10/00C09D1/00C09D5/08C09D5/10
CPCB05D1/18C09D1/00C09D5/08C09D5/10C09D5/18C21D10/005C25D3/12C25D5/34
Inventor 李晶林瓯川杜锋杜新吴思阳陈佳琦张龙飞
Owner CHANGCHUN UNIV OF SCI & TECH
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