CAJ | 학술논문

火电厂烟气脱硫系统的设备腐蚀问题比较严重,选材较为关键.为此,选用304不锈钢和2205双相不锈钢,考察了其在烟气脱硫模拟介质(死亡绿液)中不同温度和不同浸泡时间的腐蚀行为.结果表明:304不锈钢在死亡绿液中随温度变化腐蚀性很敏感,易发生点蚀,不宜用作烟气脱硫装置及其零部件;2205双相不锈钢在烟气脱硫模拟介质中不同温度和时间范围内都有良好的耐蚀性,可用作烟气脱硫装置及其零部件的材料.
화전엄연기탈류계통적설비부식문제비교엄중,선재교위관건.위차,선용304불수강화2205쌍상불수강,고찰료기재연기탈류모의개질(사망록액)중불동온도화불동침포시간적부식행위.결과표명:304불수강재사망록액중수온도변화부식성흔민감,역발생점식,불의용작연기탈류장치급기령부건;2205쌍상불수강재연기탈류모의개질중불동온도화시간범위내도유량호적내식성,가용작연기탈류장치급기령부건적재료.
The corrosion behavior of 304 and 2205 stainless steels in simulated medium of flue gas desulphuri-zation system (green death solution) was investigated at different temperature and immersion time by using an electrochemical test rig. It was found that 300 stainless steel was very sensitive to var-ying temperature and was prone to pitting at elevated tempera-ture, which made it infeasible to be used for fabricating flue gas desulphurization equipments. Contrary to the above, 2205 duplex stainless steel showed good corrosion resistance in the green death solution at different temperature and immersion time, showing promising application as frameworks of flue gas desulphnrization equipments.