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1

Deanship of Scientific Research DSR, Advanced Manufacturing Institute AMI, King Saud University, P.O. Box 800, Riyadh 11421, Saudi Arabia

2

Electrochemistry and Corrosion Laboratory, Department of Physical Chemistry, National Research Centre NRC, Dokki, Cairo 12622, Egypt

3

Mechanical Design and Materials Department, Faculty of Energy Engineering, Aswan University, Aswan 81521, Egypt

4

Department of Mechanical Engineering, College of Engineering, King Saud University, P.O. Box 800, Riyadh 11421, Saudi Arabia



These authors contributed equally to this work.





*

Author to whom correspondence should be addressed.



Academic Editor: Steven L. Suib

Abstract In this work, the results obtained from studying the corrosion of cast iron in freely aerated stagnant Arabian Gulf seawater AGS at room temperature were reported. The study was carried out using weight-loss WL, cyclic potentiodynamic polarization CPP, open-circuit potential OCP, and electrochemical impedance spectroscopy EIS measurements and complemented by scanning electron microscopy SEM and energy dispersive X-ray EDX investigations. WL experiments between two and 10 days’ immersion in the test electrolyte indicated that the weight-loss the cast iron increases with increasing the time of immersion. CPP measurements after 1 h and 24 h exposure period showed that the increase of time decreases the corrosion via decreasing the anodic and cathodic currents, as well as decreasing the corrosion current and corrosion rate and increasing the polarization resistance of the cast iron. EIS data confirmed the ones obtained by WL and CPP that the increase of immersion time decreases the corrosion of cast iron by increasing its polarization resistance. View Full-Text

Keywords: Arabian Gulf seawater; cast iron; corrosion; electrochemical measurements; weight-loss Arabian Gulf seawater; cast iron; corrosion; electrochemical measurements; weight-loss





Autor: El-Sayed M. Sherif 1,2,* , Hany S. Abdo 1,3,† and Abdulhakim A. Almajid 1,4,†

Fuente: http://mdpi.com/



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