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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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含氟化氫高炉煤气对三号結构鋼的高溫腐蝕
, PP. 90-97
Abstract:
合氟铁矿在高炉中冶炼时,炉顶煤气中含有微量的氟化氢(6—14p.p.m.);本研究观察了含氟模拟煤气对三号结构钢的腐蚀情况。所用合成煤气的成分为0.05—5％HF,1.5—2.5％H_2,0—1％H_2O,6—8％CO_2,19—23％CO,余为N_2;实验的温度范围为250—530℃。在～390℃以下,腐蚀产物为FeF_2,有保护作用。煤气中氢的存在,能阻止FeF_2的生成。在～390℃以上,所生成的FeF_2即被水蒸气转化为Fe_3O_4;即使在原先干燥的合成煤气中,组份中的CO_2和H_2作用所生成的水蒸气,已足够推动此转化反应到完毕。所以在～390℃以上,腐蚀产物都为Fe_3O_4。以上所得的各实验结果,都与热力学计算的结果相符。将氟化氢浓度自0.05％提高到5％,在390℃以下,腐蚀作用并不显著地增加。
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