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中国腐蚀与防护学报  2010, Vol. 30 Issue (3): 213-216    
  研究报告 本期目录 | 过刊浏览 |
高含H2S/CO2环境中P110钢应力腐蚀
崔世华,李春福,王朋飞,邓洪达
西南石油大学 油气藏地质与开发工程国家重点实验室 成都 610500
STRESS CORROSION CRACKING OF P110 IN ENVIRONMENT OF HIGH CONTENTS OF H2S AND CO2
CUI Shihua, LI Chunfu, WANG Pengfei, DENG Hongda
State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500
全文: PDF(1003 KB)  
摘要: 

用恒载荷拉伸法,结合腐蚀电化学测试技术和断口扫描电镜(SEM)分析技术,研究了P110钢在H2S/CO2NACE标准溶液中的硫化物应力腐蚀 (SSCC)行为。结果表明,随着溶液中的H2S含量增高,P110钢的自腐蚀电位(E corr})急剧下降,至极小值后缓慢升高,约5 h后达到稳定值直至断裂,试样呈解理状脆性断口;随溶液中通入CO2量的增大,P110 钢的自腐蚀电位(Ecorr)稍有增高,自腐蚀电流(Icorr})减小,试样断裂时间延长,断口由脆性解理向韧窝状韧性转化。这种现象的产生与H2S/CO2在钢表面的竞争吸附及P110钢在应力腐蚀环境中表面膜的拉伸破裂与再生有关。

关键词 P110H2S/CO2硫化物应力腐蚀开裂    
Abstract

The constant load tensile test, with combination of electrochemical corrosion technology and SEM analysis method, were performed to study sulfide stress corrosion cracking (SSCC) of P110 steel in H2S/CO2 NACE standard solution. The results show that, with the increase H2S content, the corrosion Ecorr of P110 steel dropped sharply and increaseed slowly again after reaching minimum point. Then the corrosion Ecorr increased to constant point about five hours until fracture phenomenon occurring, and the sample appear brittle cleavage fracture. With the content of CO2 increasing in the solution, the Ecorr potentials of steel P110 increased, the corrosion current decreased, the time of fracture extended and the brittle cleavage fracture transformed to toughness dimples. The generation of this phenomenon has the relevant combination of competitive adsorption of H2S/CO2 in steel surface and tensile breakdown and regeneration of P110 surface membrance in stress corrosion environmental.

Key wordsP110    H2S/CO2    sulfide stress corrosion cracking
收稿日期: 2008-11-24     
ZTFLH: 

TG172

 
基金资助:

 油气藏地质及开发工程国家重点实验室资助项目(PLN0609)

通讯作者: 李春福     E-mail: Lichunfulo@163.com
Corresponding author: LI Chunfu     E-mail: Lichunfulo@163.com
作者简介: 崔世华,男,1983年生,硕士生,研究方向为油气田中的H_2O与CO_2腐蚀研究

引用本文:

崔世华,李春福,王朋飞,邓洪达. 高含H2S/CO2环境中P110钢应力腐蚀[J]. 中国腐蚀与防护学报, 2010, 30(3): 213-216.
CUI Shi-Hua. STRESS CORROSION CRACKING OF P110 IN ENVIRONMENT OF HIGH CONTENTS OF H2S AND CO2. J Chin Soc Corr Pro, 2010, 30(3): 213-216.

链接本文:

https://www.jcscp.org/CN/      或      https://www.jcscp.org/CN/Y2010/V30/I3/213

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