Preparation method for electrodeposition of Ni-Co/SiC nanocomposite coatings under three-electrode system

A three-electrode system and nano-composite technology, applied in coatings, electrolytic coatings, etc., can solve the problems of grain coarsening, inability to maintain stable performance, and weak stability of nanoparticles at high temperature, etc., to achieve fine grain size, The effect of high hardness and low cost

Active Publication Date: 2018-12-28
CENT SOUTH UNIV
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Problems solved by technology

[0004] Although these processes can successfully prepare Ni-Co / SiC nanocomposite coatings, the nanoparticles themselves are not stable at high temperatures, and cannot maintain stable performance at high temperatures; microscopic exfoliation
The existing process cannot solve the problem of particle agglomeration well, but in comparison, nanoparticles have smaller particle size and larger specific surface area, and are more likely to form larger aggregates, and their impact is far greater than that of micron particles

Method used

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  • Preparation method for electrodeposition of Ni-Co/SiC nanocomposite coatings under three-electrode system
  • Preparation method for electrodeposition of Ni-Co/SiC nanocomposite coatings under three-electrode system
  • Preparation method for electrodeposition of Ni-Co/SiC nanocomposite coatings under three-electrode system

Examples

Experimental program
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Effect test

Embodiment 1

[0044] Example 1 Preparation of electrodeposited Ni-Co / SiC nanocomposite coating under a three-electrode system

[0045] Preparation of nanoparticle SiC dispersion: using 500mg / L cationic additive cetyltrimethylammonium bromide (critical micelle concentration 9.2×10 -4 mol / L) as a dispersant, add nano-SiC with different concentrations of 0g / L, 5g / L, 10g / L, 15g / L, and 20g / L respectively, and then sonicate until the nanoparticles are completely dispersed into the solution, and then stir for 24h to complete Then add 300 mg / L non-ionic surfactant Triton X-100, and conduct ultrasound again for 3 hours to obtain stable and uniform nanoparticle SiC dispersions with different concentrations;

[0046] Preparation of modified electroplating solution: The electroplating solution was mixed with nanoparticle SiC dispersions of different concentrations to obtain a modified electroplating solution. The composition of the modified electroplating solution is shown in Table 1;

[0047] Prepara...

Embodiment 2

[0054] Example 2 Preparation of electrodeposited Ni-Co / SiC nanocomposite coating under a three-electrode system

[0055] Preparation of nanoparticle SiC dispersion: using 500mg / L cationic additive cetyltrimethylammonium bromide (critical micelle concentration 9.2×10 -4 mol / L) as a dispersant, after adding nano-SiC, ultrasonicate until the nanoparticles are completely dispersed into the solution, then stir for 24h, then add 300mg / L non-ionic surfactant Triton X-100, and then ultrasonicate for 3h To obtain a stable and uniform nanoparticle SiC dispersion;

[0056] Preparation of the modified electroplating solution: the electroplating solution was mixed with the nanoparticle SiC dispersion to obtain the modified electroplating solution. The composition of the modified electroplating solution is shown in Table 2;

[0057] Preparation of Ni-Co / SiC nanocomposite coating: Firstly, two nickel sheets with 99.9% nickel content and cobalt sheets with 99.9% cobalt content are rolled tog...

Embodiment 3

[0064] Example 3 Preparation of electrodeposited Ni-Co / SiC nanocomposite coating under a three-electrode system

[0065] Preparation of nanoparticle SiC dispersion: using 500mg / L cationic additive cetyltrimethylammonium bromide (critical micelle concentration 9.2×10 -4 mol / L) as a dispersant, after adding nano-SiC, ultrasonicate until the nanoparticles are completely dispersed into the solution, then stir for 24h, then add 300mg / L non-ionic surfactant Triton X-100, and then ultrasonicate for 3h To obtain a stable and uniform nanoparticle SiC dispersion;

[0066] Preparation of the modified electroplating solution: the electroplating solution was mixed with the nanoparticle SiC dispersion to obtain the modified electroplating solution. The composition of the modified electroplating solution is shown in Table 3;

[0067]Preparation of Ni-Co / SiC nanocomposite coating: Firstly, two nickel sheets with 99.9% nickel content and cobalt sheets with 99.9% cobalt content are rolled toge...

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Abstract

The invention discloses a preparation method for electrodeposition of Ni-Co/SiC nanocomposite coatings under a three-electrode system. The preparation method includes the following steps of (1) preparation of nano-particle SiC dispersion liquid; (2) preparation of modified electroplating liquid; and (3) preparation of the Ni-Co/SiC nanocomposite coatings. Under the three-electrode system, nano-SiCparticles are co-deposited with base metal through an electrochemical method to prepare the Ni-Co/SiC nanocomposite coatings. The preparation method has convenient sampling, easy process operation, low cost, large hardness, abrasion resistance and corrosion resistance, and is a high precision surface enhancement technology. The prepared deposited Ni-Co/SiC nanocomposite coatings have wide application prospects in surface material protection.

Description

technical field [0001] The invention belongs to the field of surface material protection, in particular to a method for preparing an electrodeposited Ni-Co / SiC nanocomposite coating under a three-electrode system, and in particular to the application of this technology for high-precision surface strengthening of materials. Background technique [0002] In recent years, the continuous development of surface treatment technology has promoted the rapid progress of high-tech industries and other industrial chains, and has become an important means of product value-added and new material research and development, as well as an effective measure to improve the performance, quality and prolong the service life of electromechanical products. . [0003] Due to the electrodeposited Ni-Co alloy exhibits good magnetic, high temperature, mechanical and electrocatalytic properties. Therefore, it has been widely used in many fields in recent years. However, with the continuous developmen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D15/00C25D3/56
CPCC25D3/56C25D15/00
Inventor 李海普姚晶晶崔东红杨兆光张凤琳黄聪
Owner CENT SOUTH UNIV
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