Metal air battery including a composite anode

A method to produce a metal air battery, the method comprising:

• forming a corrosion resistant coating on a surface of an anode core to form a first composite anode, the anode core comprising a first metal and the corrosion resistant coating comprising a second metal that is different from the first metal;
• forming a cathode configured to discharge a positive charge from the metal air battery;
• forming a deplating electrode configured to at least partially electropolish the corrosion resistant coating from the first composite anode over two or more stages, wherein an initial portion of the corrosion resistant coating is configured to be removed during initial operation and one or more subsequent portions of the corrosion resistant coating are configured to be removed during one or more subsequent operations;
• providing a battery housing;
• and
• storing an electrolyte in the battery housing in contact with the cathode, the first composite anode, and the deplating electrode, wherein the electrolyte is configured to precipitate the corrosion resistant coating during electropolishing of the first composite anode.