Patent ID: 7569133

Claim:
A process for removing a coating from a surface region of a component, arranging the component and an electrode in an electrolyte; electrically connecting the component, the electrode, and a current generator; generating a pulsed current or pulsed voltage by the current generator; forming a sequence of current/voltage pulses by a plurality of different blocks with a block having a current pulse; combining a plurality of current/voltage pulses in sequence during the electrolytic coating removal; arranging an ultrasound probe within the electrolyte such that ultrasound excitation improves the hydrodynamics of the coating removal process and thereby assists the electrochemical reaction, and wherein a positive and a negative current/voltage pulses are used for the electrolytic coating removal; wherein a block is defined by a plurality of current pulses, pulse duration, pulse interval, current level, and pulse shape, applying at least a first block which includes at least two consecutives pulses of the same polarity with an interval between the pulses, and applying at least a second block which includes at least two consecutive pulses of the same polarity with an interval between the pulses, wherein the second block is different at least in the current level compared to the first block.