Degradation of alumina formed on Fe–15Cr–10Al alloy induced by chlorine and sulfur in atmospheres
气氛中硫和氯导致Fe-15Cr-10Al合金表面氧化铝膜退化

The corrosion behavior of Fe–15Cr–10Al alloy was examined at 700 °C in the reducing H2--CO2 and H2--HCl--H2S--HClatmosphere. As a result, the minor addition of HCl and H2S to a H2--CO2 atmosphere induced the degradation of protective alumina and the growth of Fe, Cr and Al oxide mixtures on the surface of Fe–15Cr–10Al alloy, which was attributed to the formation of sulfides and chlorides in the scales during corrosion procedure. The equilibrium partial pressures of chlorine, oxygen and sulfur in the mixed gases were calculated to estimate the possible reactions between the alloy components and the multi–reactants, and their corrosion mechanisms were also interpreted.