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.
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.
参考文献
| [1] | 郑卫京;刘继向;裴耀先 等.火电厂烟气脱硫装置腐蚀与防护[J].电力环境保护,1999,15(04):43-47. |
| [2] | Bernd Beckers,孙长庆,Winfried Heimann,Malin Snis.不锈钢在烟气脱硫装置中长时间使用经验[J].石油和化工设备,2004(03):40-42. |
| [3] | 何立波,左军,林伯川,陈恩鉴.烟气湿法脱硫系统中热管的耐腐蚀实验研究[J].腐蚀科学与防护技术,2003(02):111-112. |
| [4] | 闫爱军,王卫瀚,俞明芳,樊喜堂,贺科峰,姚卉芳.湿法脱硫后烟气对钢烟囱的腐蚀试验研究[J].热力发电,2006(09):57-60. |
| [5] | Miszczyk A;Darowicki K .Use of impedance spectroscopy to evaluate the durability of protective coatings after thermal shock[J].Corrosion Science,1998,40(04):663-672. |
| [6] | D.P. Le;W.S. Ji;J.G. Kim;K.J. Jeong;S.H. Lee .Effect of antimony on the corrosion behavior of low-alloy steel for flue gas desulfurization system[J].Corrosion Science: The Journal on Environmental Degradation of Materials and its Control,2008(4):1195-1204. |
| [7] | 葛红花,周国定,吴文权.316不锈钢在模拟冷却水中的钝化模型[J].中国腐蚀与防护学报,2004(02):65-70. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%