Heat-radiation anticorrosion paint of magnesium alloy LED shell and preparation method thereof

Abstract

A heat-radiation anticorrosion paint of a magnesium alloy LED shell comprises the following chemical components of: by weight, 10-80% of alloy powders, 10-80% of a high molecular resin and 10% of an organic solvent, wherein the above alloy powders contain the following chemical components of: by weight, 10-80% of Al and 1-20% of Re. With the adoption of a tantalum crucible, a preparation method of the paint comprising the following steps of: preparing alloy ingot in an electric resistance furnace, carrying out atomization on the obtained alloy under the protection of argon at the temperature of 500-600 DEG C to obtain a powder of 100-300 meshes; uniformly mixing the above metal powders, the high molecular resin and the organic solvent, and stirring for 120-300 minutes. An application method of the above anticorrosion paint contains steps of: heating the paint to 150-200 DEG C, adding the paint into a high pressure spray gun, spraying the paint onto a preheated magnesium alloy matrix, and cooling. The preparation method has advantages of simple technology and low cost. By the adoption of the preparation method, persistence of the coating can be maintained, and corrosion of a galvanic cell between a metal surface and the matrix is effectively prevented. In addition, the coating is easy to repair and can be continuously used.

Description

technical field [0001] The invention relates to a metal coating and a preparation method thereof. Background technique [0002] In recent years, with the increase of LED luminous efficiency, the cost has dropped significantly, attracting global lighting manufacturers to join in LED light source and market research and development. The United States, Japan, Europe and China Taiwan have all launched semiconductor lighting programs. However, LED lighting has a big problem in practical application, that is, heat dissipation. The problem of heat dissipation has always been the bottleneck in the application of LED lighting, and it has not been solved effectively, and it has become a worldwide problem. Low-power LEDs are well used, such as: instrument lights, signal lights, LCD screen backlight, etc. However, the application of high-power LEDs in the lighting field has just begun, and there are many products but many defects. In the final analysis, there is no good way to solve ...

AI Technical Summary

Problems solved by technology

However, LED lighting has a big problem in practical application, that is, heat dissipation.

The problem of heat dissipation has always been the bottleneck in the application of LED lighting. It has not been solved effectively and has become a worldwide problem.

These four methods have their own shortcomings: the chemical conversion coating is thin, soft, and weak in protection; the anodic oxide film is brittle and porous, and it is difficult to obtain a uniform oxide film layer on complex workpieces; the bonding force of the metal coating is low and Severe pitting tendency; prone to oxidation, evaporation and vaporization, porosity and thermal stress during laser treatment

From this point of view, it is difficult to prepare a corrosion-resistant coating with good thermal conductivity and high heat resistance by a single method.

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