On July 11, the reporter learned that the team of Professor Zheng Canying from the Department of Metal Materials Engineering at Dongyi University in South Korea recently announced that the team independently developed a super-hydrophobic technology for aluminum alloy surfaces and applied for related patents.

This technology achieves super-hydrophobic or hydrophilic properties by precisely controlling the surface structure of metal alloys. Among them, the super-hydrophobic properties of the metal surface can be used to prevent the corrosion of marine vessels and the condensation of automobile and aircraft accessories. At the same time, it can also reduce friction, realize the liquid lubrication of the piping system, and reduce the bacterial adhesion of medical instruments; It can be used for heat exchangers and other accessories, which can remove peculiar smell and improve heat exchange efficiency.

Zheng Canying said that it is not easy to maximize the hydrophobicity of metal alloys by changing the metal structure. The existing technology can also significantly improve the hydrophobicity of the aluminum alloy surface, but a polymer coating with lower surface energy is required, and Different post-processing methods such as lubricant filling consume a lot of time and cost and are not conducive to commercial promotion.

Zheng Canying's team has been committed to the research of aluminum alloy surface treatment technology development and industrial application since 2017. The technology developed this time is called the "anodic oxidation method", which maximizes the hydrophobic performance by controlling the morphology and size of the oxide nanostructures on the metal surface. The precisely controlled oxides can make the metal surface have many functions, such as anti-corrosion, anti-icing, anti-frosting, reducing friction, and improving heat resistance, and it will also improve the appearance and color quality. This technology can quickly form mixed nanostructures on a large-area metal surface, with low cost, and with a certain degree of hydrophobicity. There is no restriction on the size of the material, and the economy is outstanding.

The research team has been committed to research on the hydrophilic and hydrophobic properties of metal surfaces, and the relevant research results are expected to be applied to pipe fittings, railings, manholes, lighting accessories in medical, shipbuilding, automotive, aviation and other industries. The team has applied for 15 patents in the past 10 months. It is worth mentioning that some patents have also been successfully applied in the United States.

Link to this article： Super-hydrophobic technology on aluminum alloy surface

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