EIS study of corrosion behavior of hot-dip galvanized steel in 5 NaCl aqueous solution

摘要

Corrosion behaviour of hot-dip galvanized steel in 5% NaC1 aqueous solution was studied by electrochemical impedance spectrum (EIS) technique. The results revealed that corrosion behaviour of hot-dip galvanized steel has a great relationship with immersion time. With the increase of immersion time, corrosion products are constantly changing, and the impedance of corrosion products are different. Parameters fitted by equivalent circuit show that the impedance of corrosion products increased at first, then decreased.