Wettability of Aluminum-alloys Surface with Various Surface Roughness and Thickness Coating

Corrosion continues to be an obstacle in protecting electronic components. A coating with higher hydrophobicity is required to protect the electronic components. A surface with high roughness and thin film coating may improve the hydrophobicity of a surface. Thus, a study was conducted to explore the influence of roughness and coating thickness on the wettability of coated and uncoated Aluminum alloys. They were roughened by using silica carbide abrasive paper and coated with spray paint-polymer coating. It was found that roughness and coating thickness strongly influenced the wettability Al-alloys due to air trap and its geometrical structured (P-V, W and D).