Volume 8, No. 3, September 2020
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Corrosion Protection on High-Temperature Sulfidation of Fe-Base Alloys

Min Jung Kim, Dong Bok Lee
School of Advanced Materials Science & Engineering, Sungkyunkwan University, Suwon 16419, Korea.
Abstract: Fe-20%Ni-25%Cr alloys were aluminized through the pack-cementation technique by immersing them in the pack that consisted of the source metal, an activator, an inert filler. After aluminized Fe-20%Ni-25%Cr alloys were corroded at 800 oC for 10-100 hr in (0.9448 atm N2 + 0.031 atm H2O + 0.0242 atm H2S)-mixed gas condition. Pack-cementation is a good surface treatment technique for development of corrosion resistance coating to be utilized at high temperature corrosive condition. The corroded test coupons were characterized by a scanning electron microscope (SEM), Energy Dispersive X-Ray Spectrometer (EDS), an electron probe micro-analyzer (EPMA), an X-ray diffractometer (XRD) with Cu-Kα radiation. The aim of this study is to study the microstructural transformation of the pack-cementation aluminized coating before and after corrosion. Pack-cementation aluminized in the formation of Fe3Al intermetallic compound layer on the matrix. The Fe3Al intermetallics have reasonable corrosion and oxidation-resistance, because of the aluminized coating corroded mainly to α-Al2O3 through the selective oxidation of Al in the outer Fe3Al coating.

Key words: Sulfidation, aluminizing, pack-cementation, corrosion.

Cite: Min Jung Kim, Dong Bok Lee, "Corrosion Protection on High-Temperature Sulfidation of Fe-Base Alloys," International Journal of Materials Science and Engineering, Vol. 8, No. 3, pp. 93-98, September 2020. doi: 10.17706/ijmse.2020.8.3.81-86.

Copyright © 2020 by the authors. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).


General Information

ISSN: 2315-4527 (Print)
Abbreviated Title: Int. J. Mater. Sci. Eng.
Editor-in-Chief: Prof. Emeritus Dato' Dr. Muhammad Yahaya
DOI: 10.17706/ijmse
Abstracting/ Indexing: Ulrich's Periodicals Directory, Google Scholar, Crossref
E-mail: ijmse@iap.org