An early proof of concept uses urine to create a basic galvanic cell with zinc and copper electrodes ... such a readily-available substance. For example, the urea could be used to feed bacteria ...

An example of galvanic corrosion is a "lasagna cell". This occurs when a piece of aluminum foil is used to cover the moist, salty lasagna cooked in a steel pan. Small holes will develop in the foil ...

For example; In a zinc-copper galvanic cell, the cathode reaction is: The anode is the electrode where oxidation (loss of electrons) occurs. It attracts anions (negatively charged ions ...