油田设施受产出水和CO2/H2S腐蚀严重.以长庆某天然气井产出水为腐蚀介质,采用失重法研究了不同腐蚀影响因素对N80钢的作用规律.结果表明,随着介质温度的升高,腐蚀速率先增加后降低,并在60℃时达到最大;Cl-的影响与温度具有基本相似的规律,在Cl-含量为30 g/L时腐蚀速率最大;随着pH值的增大,腐蚀速率持续减小,并在pH值为8.0左右时达到最低;随着CO:分压的增大,腐蚀速率呈单调增大趋势;随着H2S分压的增大,腐蚀速率先下降后又缓慢升高.
Weight loss method was used to investigate the effects of various factors on the corrosion behavior of tubular steel N80 in produced water of a natural gas well in Changqing area. Results show that under the experimental conditions, the corro-sion rate first increased and then decreased with the increase of temperature, and the maximum corrosion rate was recorded at 60 ℃. The effect of Cl- was similar to that of temperature, and the maximum corrosion rate was recorded at a Cl- concentration of 30 g/L. Besides, the corrosion rate constantly decreased with in-creasing pH value and reached a minimum value at a pH value of 8.0. Moreover, the corrosion rate of the tubular steel monoton-ously increased with increasing partial pressure of CO2, but it ini-tially decreased and then slowly increased with increasing partial pressure of H2S.
参考文献
| [1] | Masamura K;Hashizume S;Sakai J .Polarization behavior of high-Aaloy OCTG in CO2 environment as affected by chlorides and sulfides[J].CORROSION,1987,43(06):359. |
| [2] | 张清,李全安,文九巴,尹树峰,白真权.C02/H2S对油气管材的腐蚀规律及研究进展[J].腐蚀与防护,2003(07):277-281. |
| [3] | 焦卫东,张耀宗,张清.CO2/H2S对油气管材的腐蚀规律[J].化工机械,2003(04):250-253. |
| [4] | 徐鸿麟 .油管钢高温高压CO<,2>/H<,2>S及CO<,2>腐蚀行为研究[D].兰州理工大学,2005. |
| [5] | 王凤平.API N-80钢在含CO<,2>多相介质中的腐蚀规律[C].第二届石油石化工业用材研讨会论文集,2001:109-110. |
| [6] | 周计明 .油管钢在含CO<,2>/H<,2>S高温高压水介质中的腐蚀行为及防护技术的作用[D].西北工业大学,2002. |
| [7] | 杨怀玉,陈家坚,曹楚南,曹殿珍.H2S水溶液中的腐蚀与缓蚀作用机理的研究Ⅲ.不同pH值H2S溶液中碳钢的腐蚀电化学行为[J].中国腐蚀与防护学报,2000(02):97-104. |
| [8] | Fierro G;Ingo G M;Mancla F .XPS-investigation on the corrosion behavior of 13Cr martensitic stainless steel in CO2-H2S-Cl-environment[J].CORROSION,1989,45(10):814. |
| [9] | X. -P. Guo;Y. Tomoe .Electrochemical behavior of carbon steel in carbon dioxide-saturated diglycolamine solutions[J].Corrosion: The Journal of Science and Engineering,1998(11):931-939. |
| [10] | Ma H Y;Cheng X L;Li G Q et al.The influence of hydrogen sulfide on corrosion of iron under different conditions[J].Corrosion,2000,56(42):1 669-1 683. |
| [11] | 白真权,李鹤林,刘道新,王献昉.模拟油田H2S/CO2环境中N80钢的腐蚀及影响因素研究[J].材料保护,2003(04):32-34. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%