Tin-containing steel had lower corrosion current and higher
impedance than tin-free steel. EIS and corrosion morphology
results showed that tin-containing steel could form a more
uniform and compact rust layer with higher Rp. The formation
of protective rust layer needed a shorter immersed period compared
to tin-free steel. All the results showed that corrosion
resistance of tin-containing steel was higher than that of tinfree
steel.