Abstract
AbstractThe local corrosion of alumina-graphite refractories at the slag-metal interface was studied by immersion tests and by direct observation using a high temperature X-ray radiographic technique. Combining these investigations with microscopic studies, a mechanism for the local corrosion was developed. The mechanism is based on the cyclic dissolution of alumina and graphite into the slag and metal phase, respectively. During the dissolution of the alumina, the motion of the slag film induced by the Marangoni effect and the evolution of gas bubbles can accelerate the dissolution process.
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