CYCLIC SULFIDATION-OXIDATION OF 12Cr STEELIN SIMULATED COAL COMBUSTION ENVIRONMENTS
在模拟煤燃烧环境中12Cr钢的循环硫化-氧化

The corrosion of a commercial steel 12Cr has been studied in simulated atmospheres with compositions changing cyclically with time from reducing to oxidizing conditions. The scales are composed of multi-layered mixtures of sulfide and oxides of iron after n cycles, while the fast growth of FeS during the first cycle produces a highest steel consumption. The overall scaling kinetics is controlled by the nature and the thickness of each scale layer and by the activity of iron in scales,affected also by penetration of each oxidant through the scale of the other oxidant (O or S).