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Corrosion and creep behaviour of alloy 800H in sulphidizing/oxidizing/carburizing environments at 700°C – Part I: Corrosion behaviour in the stress free and the stressed state
Author(s) -
Stroosnijder M. F.,
Guttmann V.,
de Wit J. H. W.
Publication year - 1990
Publication title -
materials and corrosion
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.487
H-Index - 55
eISSN - 1521-4176
pISSN - 0947-5117
DOI - 10.1002/maco.19900410903
Subject(s) - carburizing , metallurgy , materials science , creep , alloy , corrosion , oxidizing agent , stress corrosion cracking , grain boundary , stress (linguistics) , deformation (meteorology) , austenite , composite material , microstructure , chemistry , linguistics , philosophy , organic chemistry
The corrosion behaviour of the austenitic 32Ni‐20Cr steel Alloy 800H was investigated in several S‐O‐C bearing gas mixtures simulating coal gasification environments at 700°C for up to 5000 h. It is shown that relatively small changes in oxygen and sulphur activities can cause a significant change in corrosion behaviour. Moreover creep deformation leads to a marked enhancement of the corrosive attack which takes place particularly along grain boundaries lying perpendicular to the stress axis.