Leached superabrasive elements, subterranian tools with leached superabrasive elements, and related systems and methods

A subterranean tool comprising a superabrasive element produced by a process comprising:

• providing a superabrasive element comprising:
• a superabrasive face;
• and
• a superabrasive side surface extending around an outer periphery of the superabrasive face;
• wherein a protective covering is positioned over at least a portion of the superabrasive element;
• leaching a metallic material from at least a volume of the superabrasive element to produce a leached volume in the superabrasive element by:
• exposing at least a portion of the superabrasive element to a processing solution;
• exposing an electrode to the processing solution;
• applying a charge to the electrode such that a voltage is generated between the superabrasive element and the electrode and the voltage is applied to the processing solution;
• leaching a portion of the superabrasive element;
• and
• removing the protective covering from the superabrasive element.

A superabrasive element produced by a process comprising:

• leaching a metallic material from at least a volume of a polycrystalline diamond table of the superabrasive element to produce a leached volume in the polycrystalline diamond table, the polycrystalline diamond table comprising the metallic material disposed in interstitial spaces defined within the polycrystalline diamond table, the leaching comprising:
• exposing at least a portion of the polycrystalline diamond table to a processing solution exhibiting a pH below approximately 1;
• applying a charge to an electrode in communication with the processing solution;
• generating a voltage between the polycrystalline diamond table and the electrode;
• and
• leaching a region of the polycrystalline diamond table to a depth underlying a superabrasive face of the superabrasive element.