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100 hr tests on eight different steels have been carried in a bummer rig with a controlled combustion environment. Injection of a salt solution, K(2)S0(4) (9.0 g/liter) and NaCl (6.0 g/liter), created a high temperature corrosion environment similar to what can be expected during the co-combustion of sulphur containing coal and chlorine containing biomass. The test results indicate that the most corrosion resistant steels are the austenitic -the higher the chromium and nickel contents the better performance. A detrimental effect of molybdenum can be observed, a fact explained by selective chloride attack on this alloy metal. Low-alloyed steels performed very bad. As a general feature the oxide layers produced were very porous and of little to no protective value. AC66 is the alloy which perform the best and is recommended for applications with conditions similar to the tested.

Additional information

Authors: CAPPELN F, Technical University of Denmarks, Lyngby (DK);PETRUSHINA I, Technical University of Denmarks, Lyngby (DK);BAXTR D, JRC-Institute Advanced Materials, Clean Technologies Unit, Petten (NL)
Bibliographic Reference: ART 90440. Progress in Molten Salt Chemistry, Vol 1 (2000) pp.127-134-ELSEVIER
Record Number: 200013195 / Last updated on: 2001-03-23
Original language: en
Available languages: en
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