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Microstructural hot corrosion behaviour of austenitic Fe‐29.7Mn‐8.7Al‐1.04C alloy in fused Na 2 SO 4 and Na 2 SO 4 ‐NaCl mixture
Author(s) -
Tjong Sie Chin
Publication year - 1989
Publication title -
steel research
Language(s) - English
Resource type - Journals
eISSN - 1869-344X
pISSN - 0177-4832
DOI - 10.1002/srin.198900968
Subject(s) - alloy , corrosion , austenite , materials science , metallurgy , sodium , scanning electron microscope , morphology (biology) , austenitic stainless steel , chloride , microstructure , composite material , biology , genetics
A short‐time hot corrosion test was performed on the austenitic Fe‐29.7Mn‐8.7Al‐1.04C alloy in sodium sulphate at 900°C. The corrosion scales formed on the alloy investigated were studied by scanning electron microscopy and X‐ray mapping techniques. The hot‐corrosion scales morphology of the austenitic Fe‐29.7Mn‐8.7Al‐1.04C alloy were characterized by the formation of Al 2 S 3 and α‐MnS sulphides at and beneath the internal alumina scale. No fluxing of the scales was observed. The effect of the addition of sodium chloride to the fused sodium sulphate on the hot corrosion scales morphology was also investigated.