Experimental Study on Wear-resistant Superhydrophobic Surface of 5083 Aluminum Magnesium Alloy Prepared by Mask Electrolysis

Abstract

In order to improve the wear resistance of 5083 Al-Mg alloy super hydrophobic surface. A predetermined pattern of insulating mesh is attached to the metal substrate to electrochemical reactions occur on the metal surface not covered by the insulating layer, resulting in a superhydrophobic surface with a surface frame structure. One-factor experiments were conducted to investigate the effects of processing time in electrochemical etching on surface wettability and mechanical robustness of aluminum and magnesium alloys. AA5083 Al-Mg alloy was electrolytically machined with square mask in 0.4 mol/L NaCl solution as electrolyte, and its surface was superhydrophobic. Linear wear experiments were carried out and the hydrophobic property of contact angle 150.1° rolling angle 12.5° was maintained for 7 minutes after wear exceeding 25 cycle processing parameters of 1 A/cm2. SEM electron microscope image analysis of electrolytically processed aluminum and magnesium alloy surface shows that the mask electrolysis method can effectively improve the wear resistance of the superhydrophobic surface, while the frame structure produced by the mask electrolysis will not destroy the hydrophobic property of the original surface.