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Nano-composite coating based on endogenous precipitation method and preparation process thereof

A nano-composite and preparation process technology, applied in the field of metal coating preparation, can solve the problems of poor treatment effect, complex process, easy agglomeration of nanoparticles, etc., and achieves the effect of simple preparation process, improved hardness, and improved quality.

Active Publication Date: 2021-12-10
CISDI RES & DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the above-mentioned shortcoming of prior art, the object of the present invention is to provide a kind of nanocomposite coating based on endogenous precipitation method and its preparation process, for solving In the prior art, nano-particles are added to the electroplating process to prepare nano-composite coatings. The process of preparing nano-composite coatings is complex, the existing particle uniform dispersion technology has poor treatment effects, and the nano-particles are easy to agglomerate, etc., to achieve large-scale industrialization

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Examples

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Embodiment 1

[0063] In this embodiment, a nanocomposite coating based on the endogenous precipitation method is electroplated on the surface of the Q235 steel substrate. The thickness of the composite coating is 32 μm, and the mass percentage of the coating composition is 29% Cu and 71% Ni.

[0064] The preparation process steps of the nano-composite coating in this embodiment are: ultrasonic cleaning-alkali washing to remove oil-water washing-acid washing-water washing-electroplating-water washing-drying. The specific operation is as follows:

[0065] Degreasing is treated in 80°C alkaline washing solution (including sodium hydroxide solution 10g / L, sodium carbonate solution 20g / L) for 10 minutes, pickling is soaking in 10% dilute sulfuric acid for 10s to remove the surface oxide film, washing is using Cleaning with deionized water; electroplating is nickel-copper alloy electroplating solution, the pH value of the electroplating solution is 3.8, the temperature is 50°C, and the current de...

Embodiment 2

[0068] In this embodiment, a nano-composite coating based on the endogenous precipitation method is electroplated on the surface of the Q235 steel substrate. The thickness of the composite coating is 45 μm, and the mass percentage of the coating composition is 20% Cu and 80% Ni.

[0069] The preparation process steps of the nano-composite coating in this embodiment are: ultrasonic cleaning-alkali washing to remove oil-water washing-acid washing-water washing-electroplating-water washing-drying. The specific operation is as follows:

[0070] Degreasing is treated in 80°C alkaline washing solution (including sodium hydroxide solution 10g / L, sodium carbonate solution 20g / L) for 10 minutes, pickling is soaking in 10% dilute sulfuric acid for 10s to remove the surface oxide film, washing is using Cleaning with deionized water; electroplating is nickel-copper alloy electroplating solution, the pH value of the electroplating solution is 4.3, the temperature is 40°C, and the current d...

Embodiment 3

[0077] In this embodiment, a nano-composite coating based on the endogenous precipitation method is electroplated on the surface of the Q235 steel substrate. The thickness of the composite coating is 23 μm, and the mass percentage of the coating composition is 22% Cu and 78% Ni.

[0078] The preparation process steps of the nano-composite coating in this embodiment are: ultrasonic cleaning-alkali washing to remove oil-water washing-acid washing-water washing-electroplating-water washing-drying. The specific operation is as follows:

[0079] Degreasing is treated in 70°C alkaline washing solution (including sodium hydroxide solution 20g / L, sodium carbonate solution 10g / L) for 5 minutes, pickling is soaking in 5% dilute sulfuric acid for 20s to remove the surface oxide film, washing is using Cleaning with deionized water; electroplating is nickel-copper alloy electroplating solution, the pH value of the electroplating solution is 3.5, the temperature is 30°C, and the current den...

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Abstract

The invention discloses a nano-composite coating based on an endogenous precipitation method and a preparation process thereof. The nano-composite coating is a nickel-copper coating and comprises the following components including, by mass, 10%-40% of Cu, 60%-90% of Ni and 4%-23% of a copper nanoparticle strengthening phase. The preparation process of the nano-composite coating comprises the following steps that a metal matrix is subjected to ultrasonic cleaning and alkali washing for oil removal, then washed with water, subjected to acid pickling for surface oxidation film removal, washed with water, then electroplated with nickel-copper alloy electroplating liquid, washed with water after electroplating and dried; and the proportion of an endogenous and precipitated nano-particle strengthening phase can be adjusted by controlling the components, temperature and pH value of the electroplating liquid. In the nano-composite coating, the nano-particle strengthening phase is subjected to endogenous precipitation and is adjustable in proportion, so that the problems of complex process, uniform particle distribution, easiness in agglomeration and the like of traditional additional nano-particles are solved, the hardness and the wear resistance of the coating are improved, and the protection effect of the coating on the matrix is improved.

Description

technical field [0001] The invention relates to the technical field of metal coating preparation, in particular to a nanocomposite coating based on an endogenous precipitation method and a preparation process thereof. Background technique [0002] In industry, electroplating process is usually used to prepare a layer of other metals or alloys on the metal surface. Electroplating is a surface processing method that uses the principle of electrolysis to plate a layer of metal or alloy on the metal surface in a salt solution containing pre-plated metal, using the base metal to be plated as the cathode, to play the role of protection, insulation, decoration, etc. Compared with single-metal coatings, alloy coatings have more excellent surface properties. For example, nickel-copper alloys have good ductility, machinability, and good corrosion resistance in seawater and certain acidic and alkaline media. [0003] The traditional nanocomposite coating is to add water-insoluble nano...

Claims

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Application Information

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IPC IPC(8): C25D3/56
CPCC25D3/562
Inventor 易泉秀陈欣王水根冯科
Owner CISDI RES & DEV CO LTD
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