The Influence of Si Content upon the Corrosion Resistance of Fe-12Cr and Fe-12Cr-12Ni Alloys Exposed in a Reducing/Sulphidizing Atmosphere at 450 C
Many materials programmes have been directed at assisting in the selection of the most economic materials having sufficient durability for components operating with metal temperatures of 300 to 550 C. In highly reducing/sulphidizing gases, low-alloy steels corrode too fast to permit their long-term use at greater than about 250 C. There is a cost incentive in improving the performance of less expensive alloys by elemental additions which ensure the formation of an adherent protective scale. Results are presented here of a study concerned with the corrosion of some 12%Cr "model" alloys with Si additions of 1.3 to 4% exposed in a non-equilibrated CO-rich gas, of the type found in a dry-feed entrained slagging gasifier, at 450 C. Significant improvements in corrosion resistance of the higher Si alloys are discussed and compared with results on selected, more expensive commercial alloys.
Bibliographic Reference: Paper presented: 4th International Colloquium on "High Temperature Corrosion", Las Embiez (FR), May 1996
Availability: Available from (1) as Paper EN 39619 ORA
Record Number: 199610602 / Last updated on: 1996-05-27
Original language: en
Available languages: en