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Zn-Ni-Al2O3 nano composite deposit and its preparation process

A nano-composite and coating technology, applied in coatings, electrolytic coatings, cells, etc., can solve the problems of easy agglomeration and uneven dispersion of nanoparticles, and achieve good hardness and corrosion resistance, excellent corrosion resistance, and bright coating. Effect

Inactive Publication Date: 2009-12-09
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problems of uneven dispersion and easy agglomeration of nanoparticles in the plating solution in the prior art plating process, the present invention provides a Zn-Ni-Al 2 o 3 Preparation method of nanocomposite coating

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  • Zn-Ni-Al2O3 nano composite deposit and its preparation process

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specific Embodiment approach 1

[0011] Specific embodiment one: Zn-Ni-Al in this embodiment 2 o 3 In the nanocomposite coating, the nano alumina accounts for 1%-30% of the total volume of the coating, and Ni accounts for 10%-20% of the total mass of the Zn-Ni alloy.

specific Embodiment approach 2

[0012] Specific embodiment two: this embodiment prepares Zn-Ni-Al according to the following method 2 o 3 Nano-composite coating: a. Add nano-alumina particles to the Zn-Ni alloy plating solution, and control the amount of nano-alumina to 1-50g L -1 , magnetic stirring for 6 to 24 hours, ultrasonic oscillation for 0.1 to 1 hour; b. Pour the dispersed composite plating solution into the electrolytic cell for electroplating, with the nickel plate or zinc plate as the anode and the workpiece to be plated as the cathode, while using physical methods Composite plating is carried out while dispersing the plating solution. During electroplating, the magnetic stirring is intermittent stirring, stirring for 10-30s, standing still for 1-3min, the rotating speed is 100-1000 rpm, the ultrasonic frequency is 25-100kHz, and the ultrasonic intensity is 10-100W. dm -2 .

[0013] In this embodiment, the Zn-Ni alloy plating solution may use other acidic systems or alkaline Zn-Ni alloy platin...

specific Embodiment approach 3

[0022] Specific embodiment three: the difference between this embodiment and specific embodiment two is that the composition and process conditions of the acid potassium chloride system Zn-Ni alloy plating solution are: nickel chloride: 110g L -1 , Zinc chloride: 70g L -1 , Potassium chloride: 130g L -1 , Ammonium chloride: 110g L -1 , Additive: 3ml·L -1 , adjust the pH value = 4.5, the temperature is 35 ° C; the cathode current density is 6A dm -2 .

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Abstract

The invention discloses a preparation method of Zn-Ni-Al2O3 nano composite coating, relating to a Zn-Ni-Al2O3 nano composite coating and a preparation process thereof. In view of the problem of uneven dispersion and easy aggregation of nanoparticles in the plating solution in the prior art, in the Zn-Ni-Al2O3 nanocomposite coating of the present invention, nano-alumina accounts for 1% to 30% of the total volume of the coating, Ni accounts for 10% to 20% of the total mass of the Zn-Ni alloy. The preparation method is as follows: a. Add nano-alumina particles into the Zn-Ni alloy plating solution, magnetically stir and ultrasonically oscillate; b. Pour the composite plating solution into the electrolytic cell for electroplating, and disperse the plating solution by physical methods. Composite plating. The invention obtains the Zn-Ni-Al2O3 nanocomposite coating with uniform dispersion of nano-alumina, bright coating, better hardness and corrosion resistance than the Zn-Ni alloy coating.

Description

technical field [0001] The present invention relates to a kind of Zn-Ni-Al 2 o 3 Preparation process of nanocomposite coating. Background technique [0002] With the development of national defense and civilian industries, people have higher and higher requirements for the corrosion resistance of steel materials and various parts. Zn-Ni alloy coatings with a nickel content of 10% to 15% are due to their excellent corrosion resistance. It is widely used in the automobile industry, aerospace, light industry, home appliances and other industries, which greatly improves the corrosion resistance of the product and saves raw materials. [0003] Composite plating is a process in which metal and solid particles are co-deposited by electrodeposition or electroless plating to obtain a composite material layer. The coating is to strengthen the properties of the original metal coating while maintaining the properties of the original matrix metal coating, and to modify the original co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D15/00C25D21/10
Inventor 安茂忠郑环宇卞军军
Owner HARBIN INST OF TECH