Table 2: The pitting potential ( ), corrosion potential ( ) with respect to SCE, and corrosion current density ( ) extracted from potentiodynamic polarization curve.

Solution type (V) (V) (μA/cm2)

pH = 4.00.121 (0.010)−0.628 (0.011)1.38 (0.014)
pH = 6.750.260 (0.012)−0.641 (0.014)1.02 (0.006)
NaCl0.052 (0.008)−0.534 (0.016)1.58 (0.011)