The corrosion behavior of the SnO2-coated mild steel in HCl solution at different temperature


Ates S. , Baran Aydin E., YAZICI B.

JOURNAL OF ADHESION SCIENCE AND TECHNOLOGY, 2020 (SCI İndekslerine Giren Dergi) identifier identifier

Özet

In the present work, SnO(2)was successfully coated on mild steel (MS) by the sol-gel method at different times (15,30,45 min). These coatings were developed to improve the performance of corrosion protection of MS in a 0.5 M HCl solution. The morphological and structural characterization of obtained electrodes was investigated with the help of characterized by Field-emission scanning electron microscopy (FE-SEM) and the contact angle. The corrosion behavior of uncoated and at 15,30,45 min SnO2-coated MS electrodes were investigated by open circuit potential (OCP)-time, electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization techniques in 0.5 M HCl solution at 20-50 degrees C. Moreover, the potential of zero charges (pzc) of MS was determined using the EIS technique. EIS results indicated that the maximum inhibition efficiency (85%) during the coating time of 30 min at 30 degrees C. As a result, the SnO(2)film effectively protected on the MS against corrosion and reduced its corrosion rate in the HCl solution.