Methods and systems of electrochemical machining

A method of electrochemically machining a workpiece, the method comprising:

• applying a first potential to a tool electrode of an electrochemical machining system to generate a primary electric field, wherein the electrochemical machining system comprises a workpiece opposite the tool electrode, at least one bias electrode, and at least one fluid delivery channel within the at least one bias electrode;
• wherein the primary electric field is generated within an electrolyte solution between the tool electrode and the workpiece;
• applying at least one second potential to the at least one bias electrode;
• and
• delivering a charged electrolyte solution through the at least one fluid delivery channel into the electrolyte solution, wherein the applying at least one second potential and the delivering the charged electrolyte solution generates at least one secondary electric field adjacent to the primary electric field and quenches at least one location of the primary electric field.