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Molecules 2014, 19(7), 9962-9974; doi:10.3390/molecules19079962

A Comparative Study on the Electrochemical Corrosion Behavior of Iron and X-65 Steel in 4.0 wt % Sodium Chloride Solution after Different Exposure Intervals

College of Engineering, King Saud University, P.O. Box 800, Al-Riyadh 11421, Saudi Arabia
Received: 13 May 2014 / Revised: 30 June 2014 / Accepted: 3 July 2014 / Published: 9 July 2014
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Abstract

In this work, the results obtained from studying the anodic dissolution of pure iron and API X-65 5L pipeline steel after 40 min and 12 h exposure period in 4.0 wt % NaCl solutions at room temperature were reported. Potential-time, electrochemical impedance spectroscopy, potentiodynamic polarization, and chronoamperometric current-time at constant potential techniques were employed. It has been found that the iron electrode corrodes in the chloride test solutions faster than the API X-65 5L steel does under the same conditions. Increasing the exposure period for the electrodes from 40 min to 12 h showed a significant reduction in the corrosion parameters for both iron and steel in the 4.0 wt % NaCl solution. Results together confirmed clearly that the X-65 steel is superior to iron against corrosion in sodium chloride solutions. View Full-Text
Keywords: corrosion; chloride solutions; EIS; polarization; steel alloys corrosion; chloride solutions; EIS; polarization; steel alloys
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MDPI and ACS Style

Sherif, E.-S.M. A Comparative Study on the Electrochemical Corrosion Behavior of Iron and X-65 Steel in 4.0 wt % Sodium Chloride Solution after Different Exposure Intervals. Molecules 2014, 19, 9962-9974.

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