超級13Cr馬氏體不銹鋼在CO2及H2S/CO2環境中的腐蝕行為

呂祥鴻; 趙國仙; 張建兵; 謝凱意

doi:10.13374/j.issn1001-053x.2010.02.010

超級13Cr馬氏體不銹鋼在CO₂及H₂S/CO₂環境中的腐蝕行為

doi: 10.13374/j.issn1001-053x.2010.02.010

1. 西安石油大學材料科學與工程學院, 西安 710065;
2. 西安石油大學機械工程學院, 西安 710065;
3. 衡陽華菱鋼管有限公司, 衡陽 421001

基金項目:

教育部新世紀優秀人才支持計劃資助項目（No.NCET-07-0686）；國家自然科學基金資助項目（No.50704026）；西安石油大學科技基金研究項目（No.YS29030407）

詳細信息

作者簡介:
呂祥鴻(1971-),男,副教授,博士,E-mail:lxhong71@sina.com.cn

中圖分類號: TG172.8
計量
- 文章訪問數: 240
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- PDF下載量: 24
- 被引次數: 0
出版歷程
- 收稿日期: 2009-06-29

Corrosion behaviors of super 13Cr martensitic stainless steel under CO₂ and H₂S/CO₂ environment

1. School of Material Science and Engineering, Xi'an Shiyou University, Xi'an 710065, China;
2. School of Mechanical Engineering, Xi'an Shiyou University, Xi'an 710065, China;
3. Hengyang Valin MPM Co. Ltd., Hengyang 421001, China

摘要

摘要: 在模擬油田腐蝕環境中,通過高溫、高壓、CO₂和H₂S/CO₂腐蝕實驗及電化學測試,研究超級13Cr馬氏體不銹鋼的腐蝕行為.結果表明:在CO₂腐蝕環境中,隨著溫度的升高,超級13Cr的均勻腐蝕速率呈稍微上升的趨勢,點蝕輕微;在H₂S、CO₂共存條件下,超級13Cr的均勻腐蝕速率變化不大,點蝕嚴重,當Cl^-的質量濃度為160g·L^-1時,其最大點蝕深度可達28μm.超級13Cr的點蝕電位明顯高于普通13Cr的點蝕電位,溫度升高、Cl^-的質量濃度增大和H₂S氣體的存在降低了超級13Cr的點蝕電位,而CO₂對超級13Cr的點蝕電位影響不大;在N₂、CO₂環境中,超級13Cr的回復電位都在鈍化區間,且回復電位較高,具有良好的再鈍化能力.H₂S氣體的存在同樣使超級13Cr的回復電位和點蝕電位顯著降低.
- 馬氏體不銹鋼 /
- 氣體腐蝕 /
- 均勻腐蝕 /
- 點蝕
Abstract: The corrosion behaviors of super 13Cr martensitic stainless steel were studied with high temperature and high pressure CO₂ and H₂S/CO₂ test as well as electrochemical measurement at the simulated oilfield corrosion environment.The results show that with increasing temperature the uniform corrosion rate of super 13Cr martensitic stainless steel increases subsequently under CO₂ corrosion environment,and the pitting is very slight.Under H₂S/CO₂ corrosion environment,the uniform corrosion rate of super 13Cr martensitic stainless steel changes little,but the pitting becomes severe.When the Cl^- mass concentration is 160 g·L^-1,the max pitting depth comes to 28 μm.The pitting potential of super 13Cr martensitic stainless steel is bigger than that of common 13Cr,and it decreases with increasing temperature and Cl^- mass concentration as well as the presence of H₂S,while it changes slightly in CO₂ corrosion environment.The recovery potential of super 13Cr martensitic stainless steel is in the passivation zone under N₂ and CO₂ corrosion environment,and the higher recovery potential indicates that super 13Cr martensitic stainless steel possesses the superior re-passivation ability.At the same time,the presence of H₂S makes the recovery potential and pitting potential decrease remarkably.
- martensitic stainless steel /
- gas corrosion /
- uniform corrosion /
- pitting