| dc.description.abstract | The development of a hydrophobic surface on an aluminum substrate as a self-cleaning surface has been carried out. In this research, a hydrophobic aluminum surface was fabricated using a combination of boiling and STA modification technique which is environmentally friendly. The specimens in circular shape with a diameter of 14 mm were cut from a 1 mm thick aluminum sheet and were then cleaned using ultrasonic cleaner. Afterward, the specimens were boiled for 10 minutes in water. Following this, the specimens were immersed in STA-ethanol-deionized water solution at a temperature of 60o C for 5, 10, 15 and 20 hours. Surface morphology, roughness, and hardness of the hydrophobic aluminum surface were examined. The surface morphology analysis presents the existence of rough microstructure on the coated aluminum surface. While the roughness value increase with the increase of immersion times, the surface hardness value does not appear to change significantly for immersion time up to 15 hours and slightly decrease for the longer immersion time. The water contact angle of 133o and rolling angle of 13o was achieved which indicates the ultra-hydrophobicity of the aluminum surface has been obtained. | en_US |
