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Ultrasonic-assisted nano cerium oxide doped Ni-W-TiN composite coating and preparation method thereof

A nano-cerium oxide and composite coating technology, applied in coatings, electrolytic coatings, etc., can solve the problems that Ni-W alloys cannot meet the requirements of long-term protection, achieve excellent protection performance, uniform particle distribution, and reduce agglomeration effects

Inactive Publication Date: 2020-06-26
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the performance of Ni-W alloy can no longer meet the requirements of long-term protection in extreme environments

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Take 500 mL of water and heat it to 50°C, add 22 g of nickel sulfate hexahydrate, 70 g of sodium tungstate dihydrate, 65 g of trisodium citrate dihydrate, 15 g of sodium bromide, dodecylsulfonic acid Sodium 0.005 g, diluted with water to 800 mL to form a plating solution. Take 50 mL of plating solution, then dissolve 2 g of nano-cerium oxide and 5 g of nano-titanium nitride in 50 mL of plating solution and ultrasonically disperse for 15 min, then add it to the remaining plating solution, and adjust the pH value to 8.5 with ammonia water , and then set the volume to 1 L, and continued to stir for 20 min to obtain the required electrolyte.

[0025] Grind and polish the base material step by step with 400, 800, 1500, 3000 mesh sandpaper until bright, then rinse with pure water, treat with lye (60°C) containing surfactant for 2 minutes, rinse, and ultrasonically clean for 3 minutes , etched with dilute hydrochloric acid for 20 s, and finally rinsed with pure water. Finall...

Embodiment 2

[0028] Take 600 mL of water and heat it to 55 °C, add 25 g of nickel sulfate hexahydrate, 74 g of sodium tungstate dihydrate, 70 g of trisodium citrate dihydrate, 20 g of sodium bromide, dodecylsulfonic acid Sodium 0.01 g, diluted with water to 850 mL to form a plating solution. Take 80 mL of plating solution, dissolve 4 g of nano-cerium oxide and 10 g of nano-titanium nitride in the 80 mL of plating solution and ultrasonically disperse it for 20 min, then add it to the rest, adjust the pH value to 8.7 with ammonia water, and then Set the volume to 1L, and continue to stir for 30 minutes to obtain the required electrolyte.

[0029] Grind and polish the workpiece step by step with 400, 800, 1500, 3000 mesh sandpaper until bright, then rinse with pure water, treat with lye (50°C) containing surfactant for 3 minutes, rinse, and ultrasonically clean for 5 minutes. Etched with dilute hydrochloric acid for 30 s, and finally rinsed with pure water. Finally, when the workpiece is ta...

Embodiment 3

[0032] Take 700 mL of water and heat it to 60 °C, add nickel sulfate hexahydrate 27 g / L, sodium tungstate dihydrate 76 g, trisodium citrate dihydrate 75 g, sodium bromide 25 g, dodecyl Dilute 0.02 g of sodium sulfonate to 900 mL with water to form a plating solution. Take 90 mL of plating solution, dissolve 6 g of nano-cerium oxide and 20 g of nano-titanium nitride in the 90 mL of plating solution and ultrasonically disperse for 25 min, then add it to the rest of the plating solution, adjust the pH value to 8.8 with ammonia water , and then set the volume to 1L, and continue to stir for 40 min to obtain the required electrolyte.

[0033] Grind and polish the base material step by step with 400, 800, 1500, 3000 mesh sandpaper until it is bright, then rinse it with pure water, treat it with lye (55°C) containing surfactant for 4 minutes, rinse it, and ultrasonically clean it for 7 minutes , etched with dilute hydrochloric acid for 40 s, and finally rinsed with pure water. Fina...

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Abstract

The invention relates to a preparation method of an ultrasonic-assisted nano cerium oxide doped Ni-W-TiN composite coating. According to the preparation method, the concentration of nickel ions in a plating solution is reduced, the concentration of W ions is increased, the content of a complexing agent is reduced, and the content of W components in the coating is increased; through an ultrasonic-assisted method, the concentration of TiN nano particles is reduced, an SDS auxiliary agent is used, agglomeration is reduced, and the distribution uniformity of the particles in the coating is improved; the corrosion resistance of the Ni-W-TiN coating is improved through doping of nano rare earth oxide CeO2; and meanwhile, the plating solution ratio and the process parameters are optimized. The preparation process comprises the following steps of 1, preparation of an electrolyte; 2, pretreatment of a base material; and 3, electro-deposition. According to the ultrasonic-assisted nano cerium oxide doped Ni-W-TiN composite coating, the agglomeration problem of the nano particles is effectively solved, the dispersion uniformity of the nano particles is improved, and the CeO2 and the TiN are coordinated to improve the protection performance of a Ni-W alloy. The coating has better wear resistance and corrosion resistance, the comprehensive performance is obviously improved, and the coating can better adapt to a severe corrosion environment.

Description

technical field [0001] The invention relates to an ultrasonic assisted nano cerium oxide doped Ni-W-TiN composite coating, in particular to an ultrasonic assisted nano cerium oxide doped Ni-W-TiN composite coating and a preparation method thereof. Background technique [0002] In recent years, compounding nanoparticles in alloys has become a research hotspot in recent years, such as adding TiO to Ni-based alloys (Ni-W, Ni-Co, Ni-B). 2 , α-Al 2 o 3 , SiO 2 , SiC, etc., can not only further improve the hardness and wear resistance of the alloy, but also enhance its corrosion resistance, mechanical strength, thermal stability, etc. Ni-W alloy has good corrosion resistance and wear resistance, has excellent mechanical properties, and is widely used in marine engineering machinery, chemical equipment, aerospace, nuclear facilities and other fields. In recent years, with the progress of science and technology and the development of social economy, my country's nuclear industry...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/56C25D15/00C25D5/34C25D5/20
CPCC25D3/56C25D5/20C25D5/34C25D15/00
Inventor 李保松陈炜章陶然解宪
Owner HOHAI UNIV
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