Corrosion potential (E_corr) and corrosion current density (i_corr) of oxide films formed on CS in different solutions at 290 °C.

	OCP (V)	E corr (V)	i corr (A cm−2)
T (blank)	−0.531	−0.540	5.085 × 10−8
T (20Zn)	−0.118	−0.121	4.826 × 10−9
T (40Zn)	−0.356	−0.357	1.310 × 10−8
T (30Al)	−0.674	−0.681	4.948 × 10−8
T (20Zn + 20Al)	−0.348	−0.349	7.035 × 10−9