Method for obtaining micro-nano SiO2 particle containing coating on surface of aluminium and aluminium alloy

A technology of aluminum alloy surface and particle coating, applied in metal material coating process, coating, liquid chemical plating, etc. Effect

Active Publication Date: 2013-01-30
柳州一阳科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there is no micro-nano SiO in China that is easy to operate, low in cost, less polluting, and has good comprehensive performance of the coating, which is especially suitable for various aluminum and aluminum alloy workpieces. 2 Particle Composite Plating Technology

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Put the pure aluminum sheet with the specification of 30mm×15mm×5mm into nickel sulfate 30g / L, sodium hypophosphite 35g / L, sodium acetate 20g / L, trisodium citrate 20g / L, ammonium chloride 10g after pretreatment / L, SiO 2 In the plating solution of 20g / L nanoparticles, the pH of the plating solution is 11, the stirring speed is 100r / min, the controlled temperature is 50°C, and the plating time is 30 minutes. Take out the sample and rinse it with cold water and dry it to get micro-nano SiO 2 Particle composite coating, the coating is uniform, the surface is flat and smooth without burrs, dense and firm, good bonding, high hardness, and strong wear resistance.

Embodiment 2

[0028] The 6063 aluminum sheet with a size of 15mm×10mm×5mm was pretreated and placed in 25g / L of nickel sulfate, 30g / L of sodium hypophosphite, 18g / L of sodium acetate, 18g / L of trisodium citrate, and 10g of ammonium chloride. / L,, lactic acid 2g / L, SiO 2 In the plating solution containing 10 g / L of nanoparticles, the pH of the plating solution is 4.5, the stirring speed is 100 r / min, the controlled temperature is 80° C., and the plating time is 30 minutes. Take out the sample and rinse it with cold water and dry it to get Ni-P-SiO 2 Composite coating, the coating has a flat surface, dense and firm, good bonding, high hardness and strong wear resistance.

Embodiment 3

[0030] The 6063 aluminum sheet with a size of 20mm×10mm×2mm was pretreated and placed in 28g / L of nickel sulfate, 32g / L of sodium hypophosphite, 20g / L of sodium acetate, 20g / L of trisodium citrate, and 12g of ammonium chloride. / L,, lactic acid 3g / L, SiO 2 In the plating solution of 12g / L nanoparticles, the pH of the plating solution is 5, the stirring speed is 120r / min, the control temperature is 80°C, and the plating time is 30 minutes. Take out the sample and rinse it with cold water and dry it to get Ni-P-SiO 2 Composite coating, and then put the sample in a vacuum heat treatment furnace at 400 ° C for 2 hours, then slowly take it out and cool it to room temperature naturally, the obtained coating has a smooth surface, dense and firm, good bonding, higher hardness, stronger wear resistance, Has heat-resistant properties.

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Abstract

A method for obtaining a micro-nano SiO2 particle containing coating on a surface of aluminium and aluminium alloy. Samples are firstly subjected to alcohol immersing, chemical removing for oil and alkali, acid erosion, water washing and zinc dipping, and finally pre-treated by acetone and alcohol ultrasonic cleaning; SiO2 nanometer particles are placed in a non-ionic surface active agent OP-21 to immerse; and then the samples are subjected to composite chemical plating and washed by cold water to obtain the finished product. The method is reasonable in technology and easy to operate, can produce the coating just by using equipment of traditional nickel-phosphorous chemical plating technology, and has relatively good economic benefit and popularization prospect. The obtained coating is compact and firm, and has advantages of good combinability, uniform surface, high hardness, wear resistance, heat resistance and high comprehensive properties; and hardness and wear resistance of the obtained coating are all higher than that of single nickel-phosphorus coatings. The active agent is nontoxic, environmentally-friendly, highly-efficient, simple in formula, easy to operate and low in cost.

Description

technical field [0001] The invention relates to the technical field of surface modification of pure aluminum and aluminum alloys, in particular to obtaining micronano SiO on the surface of aluminum and aluminum alloys 2 Method of particle coating. . Background technique [0002] In recent years, as an important surface treatment method, electroless nickel plating has been widely used in aviation, aerospace, electronics industry, petrochemical industry, machinery, textile, automobile industry and other fields. With the development of nanomaterials science, new opportunities have been brought to surface composite coating technology. Traditional electroless plating has the disadvantages of low hardness and poor wear resistance. Nano chemical composite plating is a new surface treatment technology developed on the basis of traditional chemical plating; nano chemical composite coating is a composite coating with special functions. The coating not only has the excellent propert...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C18/36C23C18/18
Inventor 李伟洲杨剑冰李月巧胡治流刘伟
Owner 柳州一阳科技股份有限公司
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