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The scaling of pure cerium and of a cobalt-base alloy containing approximately 15 wt% cerium was studied at 600-800 o C in H 2 -CO 2 mixtures providing at equilibrium an oxygen pressure of 10 -24 atm at 600 o C and of 10 -20 atm at 700 and 800 o C. Scaling of Co-15Ce formed internal oxidation region where the Ce-rich phase...
The sulfidation behavior of a Co-Ce alloycontaining approximately 15 wt.% Ce has been studied at600-800°C in H2-H2S mixturesproviding a sulfur pressure of 10-8 atm, butalso of 10-7 atm at 800°C. At 600 and 700°C the alloy corrodes moreslowly than pure cobalt, but more rapidly than purecerium. At 800°C under 10-8 atmS2, which is below the stability of thecobalt sulfides, the alloy corrodes quite slowly,...
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