其中第一、二节热器管内主要为溶解氧腐蚀，而盘管内主要为高温蒸汽的冲刷+腐蚀。
The heating tubes in the 1st section mainly suffer from corrosion of dissolved oxygen while those in the 2nd section suffer from erosion corrosion of high-temperature steam.
避免安装在热源处及热蒸汽，腐蚀性气体的场所，以免影响寿命。
To avoid using nearby the hot or heat source place, where has the corrosive gas.
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