通过对某海上油田三相分离器进行现场调研，结合 X 射线衍射分析、硬度测试及阴极保护模拟计算对其罐体出现腐蚀和焊缝开裂的原因进行分析。结果表明：造成分离器罐体内壁底部腐蚀的主要原因是涂层与阴极保护失效状态下的 CO2腐蚀、H2 S 腐蚀和典型的垢下腐蚀；焊缝开裂原因主要在于焊缝补焊后未进行热处理，局部硬度过高发生硫化物应力腐蚀开裂。
The reasons of bottom corrosion and weld-cracking of a three-phase separator tank were investigated via in situ investigation,X-ray diffraction analysis,hardness testing and cathodic protection simulation calculation.The results showed that the main causes of the separator tank bottom corrosion were CO2 corrosion,H2 S corrosion and typical under-deposit corrosion while the coating and cathodic protection failed to protect the steel wall.The main reason of the cracking near the weld seam was induced by sulfide stress corrosion cracking under the combination effect of too-high local hardness and lack of suitable heat treatment after welding repair process.
参考文献
| [1] | <海洋石油工程设计指南>编委会.海洋石油工程设计指南[M].北京:石油工业出版社,2012 |
| [2] | 孔磊,刘立红,耿佳明.三相分离器的腐蚀分析及防护建议[J].内江科技,2012(10):71-71,73. |
| [3] | 刘学勤;刘鹤霞;李勃 等.中原油田三相分离器损坏因素研究[J].腐蚀与防护,1998,19(5):225-229. |
| [4] | 姜海一,李智慧,王金庆,王志高.天然气处理厂分离器开裂原因分析[J].石油化工设备,2012(04):98-101. |
| [5] | 高灵清,张永辉.三相分离器失效分析研究[J].材料开发与应用,1998(01):31. |
| [6] | 陈强.克拉玛依油田原油集输站三相分离器检测及其缺陷预防[J].中国石油和化工标准与质量,2011(03):67. |
| [7] | SALEH A;HASAN S;ABDUL A F.Enhance-ment of cathodic protectin system for internal surface of process vessels[A].Houston:NACE,2013 |
| [8] | 中国腐蚀与防腐学会.石油工业中的腐蚀与防护[M].北京:化学工业出版社,2001:16. |
| [9] | NE?IC S;POSTLETHWAITE J;OLSEN S .An elec-trochemical model for prediction of corrosion of mild steel in aqueous carbon dioxide solutions[J].Corro-sion,1996,52:280. |
| [10] | 陈惠玲,李晓娟,魏雨.碳钢在含氯离子环境中腐蚀机理的研究[J].腐蚀与防护,2007(01):17-19. |
| [11] | 朱元良.碳钢垢下腐蚀机理及防护技术研究[M].上海:上海交通大学出版社,2013 |
| [12] | 薛俊鹏 .H2 S 分压及 Cl- 浓度对管材腐蚀及应力腐蚀开裂的影响研究[D].北京:北京科技大学,2012. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%