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GBY系列浓硫酸液下泵专用钢铁大量应用于80～****的硫酸，温度可达60-80℃。钢铁在这一浓度和温度范围的硫酸中，表面能产生保护性的硫酸铁膜层。铸铁不适用于超过****的发烟硫酸，可能是由于三氧化硫与铁中所含的硅反应，使铸铁变脆。碳钢不适用于100～102％的发烟硫酸，超过102%的酸则...

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