Corrosion of heat exchanger alloys in equilibrated and non-equilibrated sulphidizing gas mixtures at 600 C
This paper presents the results of corrosion tests carried out on a series of Fe-12% Cr alloys in coal gasification environments at 600 C. The effects of both Si and Ti on corrosion resistance are assessed using data obtained from a commercial 12%Cr alloy, Type 410, three specially cast model 12%Cr alloys containing 2.7% Si and with Ti levels of 0%, 0.4% and 0.7%, respectively, and higher alloy heat exchanger materials, an 800-type, and an FeCrAl oxide dispersion strengthened (ODS) alloy. Tests were carried out in mixed sulphur-containing, low-pO(2) gases under either thermodynamic equilibrium conditions (H(2)-based) or conditions where equilibrium was not established (CO-based). The kinetics of corrosion are presented in terms of weight-change and metal-loss measurements and the synergistic influences of Si and Ti are discussed and corrosion resistance compared with that exhibited by the higher alloy materials.
Bibliographic Reference: Paper presented: Corrosion 98, San Diego (US), March 22-27, 1998
Availability: Available from (1) as Paper EN 41761 ORA
Record Number: 199811380 / Last updated on: 1998-11-10
Original language: en
Available languages: en