Construction of T-shaped Microstructure on Aluminum Alloy Surface

The T-shaped groove and the square-column microstructure of the aluminum alloy surface were constructed by EDM. It was found that the contact angle of the square column formed by the two processes can reach 147.62°, and the surface of the part exhibits high viscosity at the same time. Successfully achieved the preparation of highly viscous hydrophobic surfaces. At the same time, solutions of different PH were prepared to further characterize the chemical stability of the samples. It is found that the contact angle increases first and then decreases with the increase of PH, and the variation range is about 10°, which indicating that the sample has good chemical stability. Finally, the surface morphology was observed by scanning electron microscopy and the hydrophobic surface wetting mechanism was further analyzed. This paper aims to construct a good, stable functional surface and offer the basic research for subsequent functional observations of other functionalities that may be available.