Hot Corrosion of T122 and 347HFG Steels in Na2SO4 Salts at 800 and 900 °C

Chun Yu Xu; Dong Bok Lee

doi:10.4028/www.scientific.net/AMR.711.128

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 711Hot Corrosion of T122 and 347HFG Steels in Na2SO4...

Hot Corrosion of T122 and 347HFG Steels in Na₂SO₄ Salts at 800 and 900 °C

Abstract:

The T122 steel (ferritic Fe-Cr-W alloy) and 347HFG stainless steel (austenitic Fe-Cr-Ni alloy) were corroded in the Na₂SO₄ salt at 800 and at 900 °C, and their hot corrosion behavior was studied. They displayed good corrosion resistance owing to the formation of the protective Fe₃O₄ and (Fe_0.6Cr_0.4)₂O₃scales. These oxides effectively suppressed sulfidation by the Na₂SO₄ salt. The oxide scales that formed were thin and loosely adherent. The displayed good corrosion resistance was mainly attributed to the large amount of Cr in the alloys.

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Periodical:

Advanced Materials Research (Volume 711)

Pages:

128-133

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.711.128

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Online since:

June 2013

Authors:

Chun Yu Xu, Dong Bok Lee

Keywords:

Chromium, Hot Corrosion, Na₂SO₄ Salt, Steel

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