First project.
The major threat of the EC process using DC is that an impermeable oxide film may be formed on the cathode during the electrolysis. This leads a “cathode passivation”, which decreases the ionic transfer between the anode and cathode directly, hindering the metal dissolution and indirectly preventing metal hydroxide formation.
The solution is using Pulsed DC. The research I will do is how to control the current density during the EC process by adjusting the pulse width/duty cycle (PWM) in the dc pulse.