Metallic material surface treating method

A metal material and surface treatment technology, which is applied to the surface treatment of aluminum alloy, stainless steel, aluminum, steel, magnesium alloy, magnesium, and copper. It can solve the problems of multiple equipment, complex process, and high operation requirements, and achieve simple processing methods. , simple ingredients, promote the effect of heat dissipation

Inactive Publication Date: 2009-02-18
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method requires two treatments of electrogalvanizing on the surface and spraying organic transparent coating. The process is complicated, there are many equipments, and the operation requirements are high.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The copper profile was immersed in 20% sodium hydroxide solution for 1 minute, water for 3 minutes, 15% sulfuric acid solution for 1 minute and water for 3 minutes, washed with water and then immersed in 20% copper oxide nanoparticle dispersion (through Marlvern laser particle size analyzer test, the average particle size is 150 nanometers), soaked for 5 minutes, took it out, dried at 100°C, and treated at 900°C for 10 minutes. Corrosion occurred after 5 hours, and the treated profiles were still free of corrosion after 48 hours.

Embodiment 2

[0033] The iron profile was immersed in 20% sodium hydroxide solution for 1 minute, water for 3 minutes, 15% sulfuric acid solution for 1 minute and water for 3 minutes, washed with water and then immersed in 10% iron oxide nanoparticle dispersion (through Marlvern laser particle size analyzer Test, the average particle size is 80 nanometers), soaked for 10 minutes, taken out, dried at 150°C, and treated at 500°C for 30 minutes. Tested with a 60-degree gloss meter, the surface gloss of the untreated profile is 30 degrees, and the surface gloss of the treated profile is 65 degrees.

Embodiment 3

[0035] The aluminum plate was successively immersed in 20% sodium hydroxide solution for 1 minute, water for 3 minutes, 15% sulfuric acid solution for 1 minute and water for 3 minutes, and after washing with water, 25% aluminum oxide nanoparticle dispersion (via Marlvern Laser particle size analyzer test, the average particle size is 10 nanometers), dried at 95°C, and treated at 300°C for 20 minutes. The water drop test was carried out on the aluminum plate before and after treatment. The water droplets on the surface of the aluminum plate before treatment were in the shape of beads, and the water droplets on the aluminum plate after treatment were completely wetted and spread.

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PUM

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Abstract

The invention discloses a surface treatment method for a metal material, which comprises the following steps: metal to be treated is dipped into 20 percent sodium hydroxide solution, and the soaking time is between 1 and 5 minutes; the metal is dipped into water, and the soaking time is between 2 and 10 minutes; the metal is dipped into 10 to 30 percent sulphuric acid solution, and the soaking time is between 1 and 5 minutes; the metal is dipped into the water, and the soaking time is between 2 and 10 minutes; the metal washed and treated by the water is then dipped into a metal oxide nanoparticle dispersion liquid with a mass concentration of between 10 and 30 percent, and the soaking time is between 5 and 10 minutes; the treated metal is dried at a temperature of between 80 and 200 DEG C, the surface of the metal is covered with a layer of dispersion liquid wet film which forms an oxide dry-film through the drying and high-temperature treatment, and the dry-film has functions of antisepsis, decoration, protection, heat dissipation promotion, fouling resistance and so on.

Description

technical field [0001] The invention relates to the technical field of metal surface treatment, in particular to a surface treatment method for copper, steel, stainless steel, aluminum, magnesium, aluminum alloy and magnesium alloy materials. Background technique [0002] The existing metal surface treatment methods are as follows: [0003] The stainless steel products to be treated are pretreated, and the stainless steel products are used as anodes, and the constant potential value is controlled for anodic polarization treatment. The electrolyte solution is HNO↓[3], or the stainless steel products are used as cathodes, and the constant potential value is controlled for cathode electrode Then as an anode, control its constant potential value for anodic polarization treatment, and continue to change its constant potential value for passivation treatment. The electrolyte solution is also HNO↓[3]. This invention uses an electrochemical method to process stainless steel in a ni...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D7/24B05D7/14B05D3/00B05D3/10
Inventor 江琦
Owner SOUTH CHINA UNIV OF TECH
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