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A method for preparing ni-co nanocomposite multilayer alloy

A nano-composite, ni-co technology, applied in coatings, electrolytic coatings, etc., can solve the problems of no solution, coating microstructure control, lack of performance design, and no leap-forward improvement in performance, to slow down the speed, facilitate Effects of structural design and regulation, good corrosion resistance and wear resistance

Active Publication Date: 2019-04-26
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent applications with application numbers 200810246694.1, 200810143741.X, and 201210230700.0 have studied nickel-based alloys, and their performance has been improved. However, due to the lack of corresponding research on coating microstructure control and performance design, the corrosion resistance of coatings has been affected. The key factor of stability - the formation of through holes has not been fundamentally inhibited, and its performance has not been improved by leaps and bounds
In order to realize the uniform dispersion of nanoparticles and the effective preparation of multilayer alloys, people have conducted many convenient researches and explored various methods, but so far, there is no recognized satisfactory solution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Mix 2nm TiO with a mass ratio of 1:1 2 The nanopowder is made into a paste with distilled water, 5wt.% benzyltriethylammonium chloride is added, and the grinding medium is zirconia grinding balls, which are ground in a ball mill for 20 minutes, and the material is discharged to obtain pretreated TiO 2 nanoparticles.

[0022] Take 800mL of deionized water, add NiSO under magnetic stirring 4 ·6H 2 O 200g, CoSO 4 ·7H 2 O 20g, NiCl 2 ·6H 2 O 15g, H 3 BO 3 30g, add the pretreated TiO 2 Nanoparticles 15g, dilute to 1L with deionized water after feeding, mechanically stir for 60min, then ultrasonically disperse for 15min to mix evenly;

[0023] The electrolyte is heated to 70°C, the steel sheet is used as the cathode and the nickel plate is used as the anode, and the three-current cycle step method is used for electrodeposition under mechanical stirring, and the deposition parameter is i 1 =5A / dm 2 , t 1 = 1 min; i 2 =3A / dm 2 , t 2 = 10min; i 3 =3A / dm 2 , t 3...

Embodiment 2

[0025] According to the mass ratio of 1:1 ratio will be 20nm SiO 2 The nano-powder is made into a paste with distilled water, and 2wt.% of N,N,N-trimethyl-1-tetradecylammonium bromide is added, and the grinding medium is zirconia grinding balls, and it is ground in a ball mill for 50 minutes to produce material, to obtain the pretreated SiO 2 nanoparticles.

[0026] Take 900mL of deionized water, add NiSO under magnetic stirring 4 ·6H 2 O 250g, CoSO 4 ·7H 2 O 30g, NiCl 2 ·6H 2 O 20g, H 3 BO 3 20g, add pretreated SiO 2Nanoparticles 25g, dilute to 1L with deionized water after feeding, stir mechanically for 30min, then ultrasonically disperse for 10min and mix evenly;

[0027] The electrolyte is heated to 60°C, the steel sheet is used as the cathode and the nickel plate is used as the anode, and the three-current cycle step method is used for electrodeposition under mechanical stirring, and the deposition parameter is i 1 =6A / dm 2 , t 1 = 5min; i 2 =5A / dm 2 , t ...

Embodiment 3

[0029] Adjust the 150nm TiN nano powder into a paste with distilled water according to the mass ratio of 1:1, add 0.1wt.% cetyltrimethylammonium chloride, use zirconia grinding balls as the grinding medium, and grind in a ball mill for 30 minutes , and discharged to obtain pretreated TiN nanoparticles.

[0030] Take 850mL of deionized water, add NiSO under magnetic stirring 4 ·6H 2 O 300g, CoSO 4 ·7H 2 O 40g, NiCl 2 ·6H 2 O 35g, H 3 BO 3 15g, add 40g of pretreated TiN nanoparticles, dilute to 1L with deionized water after adding, mechanically stir for 90min, then ultrasonically disperse for 20min and mix well;

[0031] The electrolyte was heated to 55°C, with the steel sheet as the cathode and the nickel plate as the anode, and under mechanical stirring, the three-current cycle step method was used for electrodeposition, and the deposition parameter was i 1 =5.9A / dm 2 , t 1 = 3min; i 2 =4A / dm 2 , t 2 = 5min; i 3 =2A / dm 2 , t 3 =5min; repeat cycle N=15, take out...

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Abstract

The invention provides a method of preparing a Ni-Co nano compound multi-layered alloy. The method comprises the following steps of: S1, preparing a Ni-Co nano compound electrolyte; and S2, putting a plating article in the Ni-Co nano compound electrolyte, performing electrodeposition by means of a three current cyclic step change method, taking out the plating article after electrodeposition, washing the plating article thoroughly and naturally airing the plating article. According to the method of preparing the Ni-Co nano compound multi-layered alloy provided by the invention, the obtained plating layer is a multi-layered structure. Nanoparticles are uniformly dispersed, and the invention provides a novel method for electrodepositing preparation of the corrosion-resistant wear-resistant compound multi-layered alloy.

Description

technical field [0001] The invention relates to a method for preparing a nanocomposite coating, in particular to a method for preparing a Ni-Co nanocomposite multilayer alloy, and belongs to the technical field of material surface engineering. Background technique [0002] Ni-Co alloy has been widely used in the field of material surface engineering because of its good corrosion resistance and wear resistance. For example, spraying a Ni-Co alloy layer on the inside and outside of the butterfly valve stainless steel sealing ring can improve its wear resistance and prolong the service life of the valve. At the same time, with its good machinability, it can correct the workpiece size deviation and provide more accurate parts size. , enhance the sealing. However, with the development of nanocomposite technology, by introducing TiO into the alloy 2 ,α-Al 2 o 3 , SiO 2 , SiC, TiN and other nanoparticles have greatly improved the performance of the alloy, and its hardness and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D3/56C25D15/00
CPCC25D3/562C25D15/00
Inventor 李保松骆鸿张薇薇
Owner HOHAI UNIV
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