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
Abstract
:1. Introduction
2. Result and Discussion
2.1. Potentiodynamic Polarization Measurements
Material/Time | Parameter | |||||
---|---|---|---|---|---|---|
βc/mVdec−1 | jCorr/μAcm−2 | ECorr/mV | βa/mVdec−1 | Rp/Ωcm2 | RCorr/mmy−1 | |
Iron (40 min) | 70 | 28 | −985 | 80 | 580 | 0.326 |
X-65 (40 min) | 90 | 15 | −823 | 125 | 1517 | 0.174 |
Iron (720 min) | 95 | 18 | −907 | 115 | 1257 | 0.209 |
X-65 (720 min) | 105 | 10 | −862 | 140 | 2609 | 0.116 |
2.2. Chronoamperometric Current-Time (CT) Measurements
2.3. Open-Circuit Potential (OCP) vs. Time Measurements
2.4. Electrochemical Impedance Spectroscopy (EIS) Measurements
Material/Time | Parameter | ||||||
---|---|---|---|---|---|---|---|
RS/Ω cm2 | Q1 (CPEs) | RP1/Ω cm2 | Q2 (CPEs) | RP2/Ω cm2 | |||
YQ1/μF cm−2 | n | YQ2/μF cm−2 | n | ||||
Iron (40 min) | 6.47 | 7.44 | 0.93 | 795 | 6.17 | 0.73 | 1167 |
X-65 (40 min) | 7.73 | 5.51 | 1.0 | 897 | 4.98 | 0.74 | 1293 |
Iron (720 min) | 6.75 | 6.35 | 1.0 | 1102 | 4.69 | 0.72 | 1524 |
X-65 (720 min) | 8.87 | 4.04 | 1.0 | 1223 | 3.74 | 0.80 | 2415 |
3. Experimental Section
3.1. Chemicals and Materials
3.2. Electrochemical Cell
3.3. Electrochemical Corrosion Measurements
4. Conclusions
Acknowledgments
Conflicts of Interest
References
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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. https://doi.org/10.3390/molecules19079962
Sherif E-SM. 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(7):9962-9974. https://doi.org/10.3390/molecules19079962
Chicago/Turabian StyleSherif, El-Sayed M. 2014. "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 19, no. 7: 9962-9974. https://doi.org/10.3390/molecules19079962