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Materials 2015, 8(5), 2127-2138; doi:10.3390/ma8052127

Corrosion Behavior of Cast Iron in Freely Aerated Stagnant Arabian Gulf Seawater

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
Received: 12 February 2015 / Revised: 28 March 2015 / Accepted: 16 April 2015 / Published: 27 April 2015
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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
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Sherif, E.-S.M.; Abdo, H.S.; Almajid, A.A. Corrosion Behavior of Cast Iron in Freely Aerated Stagnant Arabian Gulf Seawater. Materials 2015, 8, 2127-2138.

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