| Title |
Corrosion of Inconel 713 Alloy in an Ar-1% SO2 Atmosphere between 800 and 1100℃ |
| Authors |
(Sang Hwan Bak); (Dong Bok Lee) |
| DOI |
https://doi.org/10.3365/KJMM.2013.51.7.505 |
| ISSN |
1738-8228(ISSN), 2288-8241(eISSN) |
| Keywords |
alloys; casting; corrosion; oxidation; scanning electron microscopy; IN 713 superalloy |
| Abstract |
The Ni-based superalloy, Inconel 713, was corroded between 800 and 1100℃ for up to 100 h in an Ar-1% SO2 atmosphere. It displayed good corrosion resistance, because the corrosion progressed mainly via oxidation rather than sulfidation. The corrosion products were α-Al2O3, Cr2O3, TiO2, NiO, NiAl2O4, and NiCr2O4. Sulfur was sometimes weakly segregated around the scale-alloy interface. Preferential oxidation occurred along the grain boundaries of the matrix. Except in these areas, uniform oxidation occurred, forming thin scales. The formed scales were prone to spallation. |