An Investigation of Hot Corrosion Phenomenon and Test Method for High Alloy Application
March 5th, 2025
Dan Tanguay, Jake Beavers, Joe Schreiner, Levi Kempka, C Paul Qiao
L.E. Jones Company
Menominee, MI 49858
Cobalt-based alloys have been conventionally used for elevated temperature clad applications such as power plant equipment and diesel engine. Two general types of cobalt clad materials include Laves phase strengthened and primary carbides strengthened. The former type includes Tribaloy 400 while later type includes Stellite 6, as an example, respectively. One of the materials challenges encountered during service for these clad materials is hot corrosion or erosion resistant to the power plant or diesel engine service environment.
An investigation of hot corrosion resistant to compare primarily intermetallic strengthened J513 alloy to conventional Tribaloy 400 and Stellite 6 was conducted with a newly established LEJ hot corrosion test procedure. This project has been established based upon observations of field engine run components that under the same diesel engine service condition, hot corrosion and thermal fatigue cracking took place in Tribaloy 400 while thermal fatigue cracking occurred in J513.
Fractographic examination has been carried out with actual engine run parts and lab tested samples. The results obtained from this investigation will assist a better understanding of hot corrosion in these alloys and, establishment of an effective testing method for ranking clad alloys in terms of hot corrosion resistance.
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