An Electrochemical Study of the Corrosion Behaviour of T91 Steel in Molten Nitrates
Abstract
:1. Introduction
2. Experimental Procedure
2.1. Testing Material
2.2. Corrosion Studies
3. Results and Discussion
3.1. Open Circuit Potential
3.2. Potentiodynamic Polarization Curves
3.3. Linear Polarization Resistance Measurements
3.4. Electrochemical Impedance Spectroscopy Measurements
3.5. Corroded Surface Analysis
4. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Testing Temperature (°C) | Ecorr (mV) | Icorr (mA/cm2) | βa (mV/dec) | βc (mV/dec) |
---|---|---|---|---|
300 | 60 | 0.01 | 295 | 420 |
400 | −10 | 0.05 | 360 | 490 |
500 | −70 | 0.41 | 420 | 570 |
Time (h) | Re (ohm cm2) | CPEdl (F/cm2) | ndl | Rct (ohm cm2) | CPEf (F/cm2) | nf | Rf (ohm cm2) |
---|---|---|---|---|---|---|---|
0 | 3.2 | 8.14 | 0.91 | 10.32 | 4.12 | 0.92 | 12,840 |
250 | 3.4 | 1.78 | 0.90 | 14.59 | 2.65 | 0.94 | 15,797 |
500 | 3.4 | 2.10 | 0.90 | 14.28 | 2.44 | 0.95 | 17,869 |
750 | 3.5 | 2.36 | 0.89 | 13.69 | 2.14 | 0.96 | 18,050 |
1000 | 3.6 | 2.37 | 0.89 | 13.56 | 2.15 | 0.96 | 18,306 |
Time (h) | Re (ohm cm2) | CPEdl (F/cm2) | ndl | Rdl (ohm cm2) | CPEf (F/cm2) | nf | Rf (ohm cm2) |
---|---|---|---|---|---|---|---|
0 | 3.2 | 3.72 | 0.9 | 12.66 | 1.21 | 0.9 | 2808 |
250 | 4.3 | 2.56 | 0.8 | 9.94 | 2.20 | 0.9 | 10,348 |
500 | 4.2 | 2.72 | 0.8 | 7.36 | 2.03 | 0.9 | 11,659 |
750 | 4.3 | 2.75 | 0.8 | 7.65 | 1.93 | 0.9 | 12,476 |
1000 | 4.2 | 2.74 | 0.7 | 7.91 | 1.93 | 0.9 | 12,717 |
Time (h) | Re (ohm cm2) | CPEdl (F/cm2) | ndl | Rdl (ohm cm2) | CPEf (F/cm2) | nf | Rf (ohm cm2) |
---|---|---|---|---|---|---|---|
0 | 4.7 | 1.88 | 0.8 | 6.0 | 1.55 | 0.8 | 196 |
250 | 6.3 | 2.09 | 0.7 | 3.8 | 1.05 | 0.7 | 694 |
500 | 4.6 | 3.29 | 0.7 | 3.1 | 2.05 | 0.7 | 665 |
750 | 4.7 | 5.72 | 0.7 | 2.5 | 2.32 | 0.7 | 655 |
1000 | 4.0 | 1.28 | 0.7 | 5.4 | 8.99 | 0.7 | 750 |
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Lopez-Dominguez, D.; Gomez-Guzman, N.B.; Porcayo-Calderón, J.; Lopez-Sesenes, R.; Larios-Galvez, A.K.; Sarmiento-Bustos, E.; Rodriguez-Clemente, E.; Gonzalez-Rodriguez, J.G. An Electrochemical Study of the Corrosion Behaviour of T91 Steel in Molten Nitrates. Metals 2023, 13, 502. https://doi.org/10.3390/met13030502
Lopez-Dominguez D, Gomez-Guzman NB, Porcayo-Calderón J, Lopez-Sesenes R, Larios-Galvez AK, Sarmiento-Bustos E, Rodriguez-Clemente E, Gonzalez-Rodriguez JG. An Electrochemical Study of the Corrosion Behaviour of T91 Steel in Molten Nitrates. Metals. 2023; 13(3):502. https://doi.org/10.3390/met13030502
Chicago/Turabian StyleLopez-Dominguez, D., N. B. Gomez-Guzman, J. Porcayo-Calderón, R. Lopez-Sesenes, A. K. Larios-Galvez, E. Sarmiento-Bustos, E. Rodriguez-Clemente, and J. G. Gonzalez-Rodriguez. 2023. "An Electrochemical Study of the Corrosion Behaviour of T91 Steel in Molten Nitrates" Metals 13, no. 3: 502. https://doi.org/10.3390/met13030502