| Cr13钢在CO_2/H_2S环境中腐蚀规律试验研究 |
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| 引用本文： | 耿捷,赵永峰.Cr13钢在CO_2/H_2S环境中腐蚀规律试验研究[J].石油矿场机械,2013(11):66-71. |
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| 作者姓名： | 耿捷 赵永峰 |
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| 作者单位： | [1]中油国际（乍得）有限责任公司采油厂,北京100034 [2]中国石油技术开发公司,北京100028 |
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| 摘 要： | 通过模拟腐蚀环境,采用慢应变速率拉伸方法研究Cr13钢在CO2/H2S环境中的力学性能以及腐蚀规律;利用金相显微镜、扫描电子显微镜观察拉伸断口的微观形貌,分析其断裂机理。试验结果表明：Cr13钢在空气、50g/L的Cl-水溶液、pH为5.0的饱和CO2溶液中的应力腐蚀敏感性不高,表现为韧性开裂;介质的pH从5.0降到4.0,可使Cr13钢在Cl-水溶液中及饱和CO2溶液中的应力腐蚀开裂敏感性增强,使Cr13钢从韧性断裂变为脆性断裂;H2S促进了Cr13钢在水溶液和饱和CO2溶液中的应力腐蚀开裂的敏感性。
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| 关 键 词： | Cr13钢 CO2 H2S腐蚀 慢应变速率 腐蚀开裂 |
Experimental Study of Corrosion Law of Crl3 Steel in CO2/H2 S Corrosion Environment |
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| GENG Jie,ZHAO Yong-feng.Experimental Study of Corrosion Law of Crl3 Steel in CO2/H2 S Corrosion Environment[J].Oil Field Equipment,2013(11):66-71. |
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| Authors: | GENG Jie ZHAO Yong-feng |
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| Affiliation: | 1. Oil Production Plant, CNPC International (Chad) Co. , Ltd. , Beijing 100034, China ; 2. China Petroleum Technology Development Company ,Beijing 100028,China) |
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| Abstract: | The mechanical property of Crl3 Steel was investigated by SSRT method in a simulated CO2/HzS corrosion environment,its fracture mechanism was analyzed by means of watching mi- crostructure of tensile fracture in metallurgical microscope, SEM. Experimental result indicated that SCC sensitivity of Crl3 Steel in air, 50 g/L Cl- solution or saturated, pH = 5, CO2 solution was no high,its fracture mode was toughness crack, pH value of media decreased from 5.0 to 4.0, SCC sensitivity of Crl3 Steel in Cl- solution or saturated COz solution was reinforced,its fracture mode was changed from toughness crack into brittle rupture. The existence of H2S facilitated SCC sensitivity of Crl3 Steel in Cl- solution or saturated CO2 solution. |
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| Keywords: | Crl 3 steel CO2 / H2 S corrosion slow strain rate test （SSRT） stress corrosion cracking |
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