The Corrosion Behavior of Pure Iron under Solid Na2SO4 Deposit in Wet Oxygen Flow at 500 °C
Abstract
:1. Introduction
2. Results
2.1. Mass Gain Measurements
2.2. Electrochemical Corrosion
2.3. Corrosion Products and Morphologies
3. Discussion
3.1. The Interaction between Electrochemical Corrosion Reaction and Chemical Corrosion Reaction
3.2. The Corrosion Behavior of the Pure Fe under a Na2SO4 Deposit in an Atmosphere of H2O + O2
3.3. Thermodynamic Calculation
Reactions | Conditions |
---|---|
4Fe + 3O2 + 2H2O + 2Na2SO4 → NaFeO2 + 2H2SO4 | PH2SO4 < 19,090.3 Pa |
H2SO4 + Fe → FeSO4 + H2 | PH2 < 1.02 PH2SO4 |
6FeSO4 + O2 + 6H2O → 2Fe3O4 + 6H2SO4 | PH2SO4 < 42,116.9 Pa |
5FeSO4 + O2 + 5H2O → Fe2O3 + Fe3O4 + 5H2SO4 | PH2SO4 < 41,040.8 Pa |
4Fe + 3O2 + 2Na2SO4 → 4NaFeO2 + 2SO3 | PSO3 < 42,491.1 Pa |
4. Experimental Section
4.1. Materials and Experimental Conditions
4.2. Mass Gain Measurements
4.3. Electrochemical Experiments
5. Conclusions
Acknowledgments
Author Contributions
Conflicts of Interest
References
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Tang, Y.; Liu, L.; Fan, L.; Li, Y.; Wang, F. The Corrosion Behavior of Pure Iron under Solid Na2SO4 Deposit in Wet Oxygen Flow at 500 °C. Materials 2014, 7, 6144-6157. https://doi.org/10.3390/ma7096144
Tang Y, Liu L, Fan L, Li Y, Wang F. The Corrosion Behavior of Pure Iron under Solid Na2SO4 Deposit in Wet Oxygen Flow at 500 °C. Materials. 2014; 7(9):6144-6157. https://doi.org/10.3390/ma7096144
Chicago/Turabian StyleTang, Yanbing, Li Liu, Lei Fan, Ying Li, and Fuhui Wang. 2014. "The Corrosion Behavior of Pure Iron under Solid Na2SO4 Deposit in Wet Oxygen Flow at 500 °C" Materials 7, no. 9: 6144-6157. https://doi.org/10.3390/ma7096144