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Corrosion of Fe-(9~37) wt.%Cr Alloys at 700-800 oC in (N2, H2O, H2S)-Mixed Gas
Version 1
: Received: 18 October 2016 / Approved: 18 October 2016 / Online: 18 October 2016 (08:04:51 CEST)
A peer-reviewed article of this Preprint also exists.
Kim, M.J.; Abro, M.A.; Lee, D.B. Corrosion of Fe-(9~37) wt. %Cr Alloys at 700–800 °C in (N2, H2O, H2S)-Mixed Gas. Metals 2016, 6, 291. Kim, M.J.; Abro, M.A.; Lee, D.B. Corrosion of Fe-(9~37) wt. %Cr Alloys at 700–800 °C in (N2, H2O, H2S)-Mixed Gas. Metals 2016, 6, 291.
Abstract
Fe-(9, 19, 28, 37)wt.% Cr alloys were corroded at 700 and 800 oC for 70 h under 1 atm of N2, 1 atm of N2/3.2%H2O-mixed gas, and 1 atm of N2/3.1%H2O/2.42%H2S-mixed gas. The corrosion rate of Fe-9Cr alloy increased with the addition of H2O, and furthermore with the addition of H2S in N2 gas. Fe-9Cr alloy was always nonprotective. In contrast, Fe-(19, 28, 37) wt.%Cr alloys were protective in N2 and N2/H2O-mixed gas because of formation of the Cr2O3 layer. They were, however, nonprotective in N2/H2O/H2S-mixed gas because sulfidation dominated to form the outer FeS layer and the inner Cr2S3 layer containing some FeCr2S4.
Keywords
Fe-Cr alloy; oxidation; sulfidation; H2S corrosion
Subject
Chemistry and Materials Science, Metals, Alloys and Metallurgy
Copyright: 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.
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