Additives and the corrosion resistance of aluminosilicate refractories in molten Al-5Mg

摘要

Additives such as BaSO{sub}4, CaF{sub}2, and AlF{sub}3 have been used in aluminosilicate refractories to reduce the detrimental reactions (corrosion) occurring between molten aluminum alloys and these refractories. In this article, the effects ofthese additives and Na{sub}2O on the behavior of a simple aluminosilicate ceramic in molten Al-5Mg are presented. Because these refractories usually contain several oxides in addition to aluminum and silica, the analysis of their corrosion behavior can be complicated or even inconclusive. Thus, only aluminosilicates with a mullite-like composition were selected for study.