| 温度对P110钢在饱含CO_2/H_2S水介质中腐蚀行为影响 |
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| 作者单位： | ;1.吉林油田分公司油气工程研究院 |
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| 摘 要： | 利用高温高压釜失重实验、电化学阻抗谱、Tafel曲线以及扫描电镜等技术,研究了温度对P110钢在饱含CO_2和H_2S气体的吉林油田采出水中的腐蚀行为影响。结果表明,随着温度的升高,P110钢的腐蚀速率首先增大;当温度高于50℃后,腐蚀速率又呈现下降的趋势。这主要是由于低温下所成腐蚀膜的致密性较差,当温度高于50℃后腐蚀膜由明显的晶态FeCO_3组成,且温度越高,腐蚀膜的晶态特征越明显、晶粒越细,膜对基体的腐蚀保护作用越强。
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| 关 键 词： | P110钢 电化学阻抗谱 CO2腐蚀 地层水 |
Influences of Temperature on the Corrosion Behaviors of P110 Steel in the Stratum Water of Jilin Oilfield Containing the Saturated CO_2 and H_2S Gases |
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| Affiliation: | ,Jilin Oilfield Branch oil and Gas Engineering Research Institute |
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| Abstract: | The influences of temperature and pressure on the corrosion behaviors of P110 steel in the stratum water of Jilin oilfield containing saturated CO_2 and H_2S gases, were investigated by using high temperature and high pressure corrosion experiment, electrochemical impedance spectra, mass loss, Tafel curve and scanning electron microscopy, respectively. The results showed that the corrosion rate of P110 steel initially increased, and it decreased when the temperature was over 50℃. The main reason was attributed to the film compactness was worse when the temperature was below 50℃, and it became better in the case of over 50℃. |
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| Keywords: | P110 steel Electrochemical impedance spectra(EIS) Carbon dioxide corrosion(CO2 corrosion) Stratum water |
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