研究了3种700℃超超临界燃煤锅炉备选高温合金Inconel 740,CCA617,GH 2984在760℃现役机组煤灰腐蚀介质中的高温腐蚀行为.结果表明:镍基合金Inconel 740和CCA 617均能形成保护性的Cr2O3氧化膜,局部点蚀为其主要失效形式.点蚀区域氧化膜为多层结构,由外到内依次为Ni(Co)O、Cr2O3(TiO、Al2O3)以及少量内层硫化物:较高Cr、Al含量提高了Inconel 740合金的耐蚀性能;挥发性产物与氧化膜微区溶解降低了CCA 617合金氧化膜的致密性.GH 2984合金因含有较多的Fe未能形成保护性的氧化膜,氧化膜分层生长,且出现了严重的剥落现象.
参考文献
| [1] | Viswanathan R,Bakker W T.Materials for boilers in ultra supercritical power plants[A].Proceedings of 2000 International Joint Power Generation Conference[C].Miami Beach,Florida,2000 |
| [2] | Baker B A,Smith G D.Corrosion resistance of alloy 740 as superalloy tubing in coal-fired ultra-supercritical boilers[A].The NACE Annual Conference 2004[C].New Orleans,LA,2004 |
| [3] | 林富生,谢锡善,赵双群等.我国700℃超超临界锅炉过热器管用高温合金选材探讨[J].动力工程学报,2011,31(12):960 |
| [4] | Gosia S,Diana M F,J(o)rg M,et al.Nickel-base superalloys for ultrasupercritical coal-fired power plants:Fireside corrosion.Laboratory studies and power plant exposures[J].Fuel,2013,108:521 |
| [5] | 赵双群,谢锡善,Smith G.新型镍基高温合金在模拟燃煤锅炉环境中的腐蚀[J].金属学报,2004,40(6):659 |
| [6] | Natesan K,Park J H.Fireside and steamside corrosion of alloys for USC plants[J].Int.J.Hydrogen Energy,2007,32:3689 |
| [7] | Smith G D,Patel S J,Farr N C,et al.The corrosion resistance of Nickel-containing alloys in coal-fired boiler environment[A].The NACE Annual Conference 99[C].San Antonio,TX,1999 |
| [8] | 王淑荷,杜秀魁,郭建亭等.舰用GH984合金在不同环境中的腐蚀性能[J].腐蚀科学与防护技术,2002,14(5):284 |
| [9] | 石声泰,李守臣,曹铁.硫酸钙沉积导致铁基和镍基合金的热腐蚀[J].中国腐蚀与防护学报,1983,3(3):133 |
| [10] | 赵双群,谢锡善.粉煤燃烧环境中过热器管材的高温腐蚀[J].特殊钢,2003,24(6):36 |
| [11] | Martti A,Pasi V,Raili T,et al.Effective new chemicals to prevent corrosion due to chlorine in power plant superheaters[J].Fuel,2008,87:647 |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%