Corrosion of 316L in Liquid Tellurium at 551°C
Résumé
Grade 316L stainless steel was exposed to liquid tellurium at 551 o C. Corrosion was rapid, leading to more than 100$\mu$ m loss of steel section in 30 min. The corrosion product was a mixed telluride scale, which thickened according to parabolic kinetics whilst simultaneously dissolving at its outer surface into the liquid tellurium. A mathematical model based on diffusion-controlled scale growth coupled with dissolution at a rate controlled by liquid phase diffusion is shown to describe scaling and dissolution kinetics successfully.
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