Surface texturing of aluminium alloy AA2024-T3 by picosecond laser: Effect on wettability and corrosion properties
By Ahuir-Torres, J. I.; Arenas, M. A.; Perrie, W.; Dearden, G.; Damborenea, J. de
Published in Surface and Coatings Technology
2017
Abstract
Abstract The effects of laser texturing on the corrosion and wettability of AA2024-T3 using an {IR} Nd:Vanadate picosecond (ps) laser was studied. Three types of texture patterns were generated: dimples with 5% and 50% area density (percentage of surface area textured); cross groove patterns with an area density of 64%; and concentric ring patterns with an area density of 70%. For the higher area densities, the surface character changed from hydrophilic to hydrophobic. The evolution of the open circuit potential over time, potentiodynamic polarization curves and electrochemical impedance spectroscopy were then investigated and analysed. The results revealed that ultrashort ps laser surface texturing did not modify the corrosion behaviour of {AA} 2024-T3 in the test solution.