For example, the mole fraction of divacancies needed to support a current of 0.2 mA/cm2 (1.3 mA/in.2 ) is 102 . This number is approximately 100 times larger than the equilibrium mole fraction of monovacancies at the melting point of a metal. Even with these assumptions, the value of 0.2 mA/cm2 (1.3 mA/in.2 ) is 10 to 100 times lower than experimentally measured dealloying currents.