Discharge Characteristic of Micro-Arc Oxidation on Aluminum Alloy under the Changing Electrolyte Temperature

The electrolyte temperature has a great influence on the performance of coating prepared by micro-arc oxidation (MAO). behavior MAO discharge in changing been investigated. Compared to constant conventional process, process different characteristics under temperature. amplitude pulse voltage was detected study change characteristic constant-current control power supply. Three successive stages were differentiated variable versus time. Since there significant changes sound, sound signals acquired and audio analysis used describe at stages. Optical emission spectroscopy (OES) employed situ unveil how micro-discharge changed with increasing. Scanning electron microscopy (SEM) characterize morphology coatings 6N01 aluminum alloy normal constant-temperature A mode film growth given effects whole process.