在实验室规模的流化床(FBC)中分别燃烧低S(097 m ass％）与低Cl(0026 mass％)，中S(168 ss％）与高Cl(042 mass％)，高S(448 mass％）与高Cl(041 mass％)三种煤各1000小时后，对放置于接近沸腾床位置的 A210-C碳钢管的退化情况进行了研究.结果表明，(1)碳钢退化明显受温度影响，随表面温度的升高显著加快；(2)碳钢退化明显受飞行粒子带来的冲蚀影响；（3)燃烧低S低Cl煤对碳钢的耗损影响最小，而燃烧高S高Cl煤对碳钢耗损影响最大.同时根据对腐蚀产物的观测分析，对不同煤种燃烧产生的环境中碳钢的退化机制进行探讨.
Degradation of A210 C carbon steel was investigated after 1000 h exposure under a laboratory-scale fluidized-bed combustor (FBC) firing three different coals respectively:low S (0.97 mass%) and C (0.026 mass %) coal,low S (1.68 mass %) and high Cl (0.42 mass %) coal，and high S (4.48 mass %) and CI (0.41 mass%) coal.There were several observations:(1) Degradation is strongly temperature dependent,which significantly increases with increase of the surface temperature of the metal,(2) erosion induced by flying particles makes a great contribution to metal recession,(3) the environment by firing the low S and low Cl coal is the slightest aggressive,while the one firing the high S and high Cl coal is the most corrosive.Morphological evidences obtained in the work are helpful to interpret the effect of the coal-fired atmospheres on the recession of the carbon steel.
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