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本文对转化管外壁腐蚀原因进行了分析。结果表明,炉内投放锅炉烟垢清除剂造成了炉管外表面发生盐类粉尘腐蚀和保护膜破坏,但炉管外壁局部腐蚀破坏是高温下氧、硫沿晶腐蚀破坏。
In this paper, the cause of corrosion on the outer wall of conversion tube is analyzed. The results show that the boiler soot removal agent caused the salt dust corrosion and the protective film destruction on the outer surface of the furnace tube. However, the local corrosion damage on the outer wall of the furnace tube was caused by the corrosion of oxygen and sulfur along the crystal at high temperature.