Abstract
In this study, the high temperature corrosion features of heat resistant stainless steels in COG (Coke Oven Gas) combustion environment are presented. These stainless steels were modified Mo - Re 1 and HK-40. They were used as radiant tubes in continuous annealing lines at cold rolled steel plants. These steels were severely corroded in a COG combustion environment. According to exposed temperatures of the alloys, these alloys exhibited various morphologies. Under the penetrated area due to severe corrosion, there was a large scale deposit. Considering a few possible modes of degradation, it was concluded that spalling of oxide layers was mainly responsible for the severe degradation.
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