Abstract
Hot-corrosion behavior and morphological development of AISI 1020 steel with 2 mg cm−2 mixtures of various NaCl/Na2SO4 ratios at 700°C were investigated by means of weight gain measurements, Optical Microscope (OM), X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy dispersive X-ray spectroscopy (EDS). The weight gain kinetics of the steel with mixtures of salt deposits display a rapid growth rates, compared with the weight gain kinetics of AISI 1020 steel without salt deposit in dry air oxidation, and follow a steady-state parabolic law for 49 h. Chloridation and sulfidation produced by a molten NaCl/Na2SO4 on the steel induced hot-corrosion mechanism attack, and are responsible for the formation of thicker scale. The most severe corrosion takes place with the 70 wt.% NaCl mixtures in Na 2SO4. The typical Fe2O3 whisker growth in outer part scale was attributed to the FeCl3 volatilization. The formation of FeS in the innermost scale is more pronounced as the content of Na 2SO4 in the mixture is increased.
REFERENCES
- 1. G. Liu, Y. Zhang, Z. Ni and R. Huang, Const. Build. Materials 115, 1–5 (2016) https://doi.org/10.1016/j.conbuildmat.2016.03.213, Google ScholarCrossref, CAS
- 2. D. Lindberg, J. Niemi, M. Engblom, P. Yrjas, T. Lauren and M. Hupa, Fuel Process. Technology 141, 285–298 (2016) https://doi.org/10.1016/j.fuproc.2015.10.011, Google ScholarCrossref, CAS
- 3. L. Zheng, Z. Maicang and D. Jianxin, Maters. Design 32, 1981–1989 (2011) https://doi.org/10.1016/j.matdes.2010.11.067, Google ScholarCrossref, CAS
- 4. N. Arivazhagan, S. Narayanan, S. Singh, S. Prakash and G. M. Reddy, Maters. Design 34, 459–468 (2012) https://doi.org/10.1016/j.matdes.2011.08.034, Google ScholarCrossref, CAS
- 5. C. C. Tsaur, J. C. Rock, C. J. Wang, Y. H. Su, Maters. Chem. Physics 89, 445–453 (2005) https://doi.org/10.1016/j.matchemphys.2004.10.002, Google ScholarCrossref, CAS
- 6. Y. Niu, F. Gesmundo, F. Viani, W. Wu, Oxid. Metals 42, 265–284 (1994) https://doi.org/10.1007/BF01052027, Google ScholarCrossref, CAS
- 7. M.A. Clevinger, K.M. Kessel and C.G. Messina, in: H.M. Ondik (Ed.), Phase Diagrams for Ceramists, (The American Ceramic Society Inc., Columbus, Ohio, 1989), p. 109, Google Scholar
- 8. C. J. Wang and J. Y. Pan, Maters. Chem. Physics 82, 965–973 (2003) https://doi.org/10.1016/j.matchemphys.2003.08.017, Google ScholarCrossref, CAS
- 9. N. Birks, G. H. Meier and F. S. Pettit, Introduction to the high-temperature oxidation of metals 2nd Ed., (Cambridge University Press, Cambridge, 2006), pp. 83–86, Google ScholarCrossref
- 10. C. J. Wang and Y. C. Chang, Maters. Chem. Physics 76,151–161 (2002) https://doi.org/10.1016/S0254-0584(01)00515-6, Google ScholarCrossref, CAS
- 11. J. G. Speight, Lange’s Handbook of Chemistry 16th Ed., (Mc. Graw-Hill, New York, 2005), pp. 38–142, Google Scholar
- 12. V. Buscaglia, P. Nanni and C. Bottino, Corros. Science 30, 327–349 (1990) https://doi.org/10.1016/0010-938X(90)90042-4, Google ScholarCrossref, CAS
- 13. S. Mrowec and K. Przybylski, Oxid. Metals 23, 107–139 (1985) https://doi.org/10.1007/BF00659899, Google ScholarCrossref, CAS
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