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Method for forming high-thermal-conducting hydrophilic nano ceramic film on surface of aluminum

A nano-ceramic and aluminum surface technology, which is applied in the coating process of metal materials, etc., can solve the problems of corrosion resistance of the coating film, poor odorlessness, easy to wear molds, etc., and achieves strong temperature resistance, improved applicability, and good implementation effect Effect

Active Publication Date: 2015-05-20
苏州容电储能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional inorganic hydrophilic coating film is cheap, and the coating film has good hydrophilicity, but the corrosion resistance and odor-free property of the coating film are poor, and the mold is easy to wear during processing

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022]The method for forming a high thermal conductivity hydrophilic nano-ceramic film on the aluminum surface is as follows: first, the aluminum surface is degreased, that is, the grease on the metal aluminum surface is removed with an alkaline degreasing solution. After that, the acid etching process is carried out, that is, the oxide layer on the surface of the metal aluminum and the residual alkaline degreasing solution are removed with an acid solution. Next, a chemical oxidation process is carried out, that is, an oxidizing solution with a certain ratio is used to promote the formation of a hydrophilic nano-ceramic film on the surface of the metal aluminum. After that, it enters the drying process, that is, the chemically oxidized sample is taken out, rinsed with deionized water, and then dried. Finally, a highly thermally conductive hydrophilic nano-ceramic film is formed on the aluminum surface.

[0023] Specifically, the proportion of the alkaline degreasing solution...

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PUM

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Abstract

The invention relates to a method for forming a high-thermal-conducting hydrophilic nano ceramic film on the surface of aluminum. The method is characterized in that the high-thermal-conducting hydrophilic nano ceramic film is obtained by effectively regulating and controlling the contents of an oxidizing agent, an activating agent, a pH regulating agent and an additive in a chemical oxidizing solution, the oxidizing temperature and the oxidizing time in the chemical oxidizing process. The hydrophilic nano ceramic film with a thickness of 0.01-100mu m can be formed on the surface of aluminum. The contact angle between the hydrophilic nano ceramic film and water is 0-30 degrees, the thermal conductivity of the hydrophilic nano ceramic film is 0.1-50W / (m.K) and is much higher than that of the traditional organic hydrophilic coating, and the temperature resistance of the hydrophilic nano ceramic film is good. The hydrophilic nano ceramic film can resist the high temperature of 600 DEG C, can retard flame, can be firmly combined with the substrate of aluminum, can not peel off even if being cleaned ultrasonically for 30 minutes and is improved in applicability greatly.

Description

technical field [0001] The invention relates to a method for forming a ceramic film on an aluminum surface, in particular to a method for forming a high-thermal-conductivity hydrophilic nano-ceramic film on the aluminum surface. Background technique [0002] When the air conditioner heat exchanger is working, it will form a "water bridge" due to the condensation of water vapor on the surface of the fins, thus affecting heat transfer and air flow. At the same time, during long-term use, the fins will form "white powder" due to corrosion, which will affect their service life. In order to solve the problems of "water bridge" and "white powder", the surface of the fins is treated with hydrophilicity, so that a hydrophilic corrosion-resistant film is formed on the surface of the fins, and the condensed water droplets spread rapidly on the surface to form extremely thin water droplets. The film can avoid the formation of "water bridge", reduce wind resistance, prevent oxidation...

Claims

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Application Information

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IPC IPC(8): C23C22/34C23C22/56C23C22/78
CPCC23C22/34C23C22/56C23C22/78
Inventor 谢贤宁林群严玲张顺中
Owner 苏州容电储能科技有限公司