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    王霞, 张仁勇, 上官昌淮, 陈勇彬. 两种套管钢在含CO2模拟油田地层水中的腐蚀行为[J]. 机械工程材料, 2013, 37(5): 69-72.
    引用本文: 王霞, 张仁勇, 上官昌淮, 陈勇彬. 两种套管钢在含CO2模拟油田地层水中的腐蚀行为[J]. 机械工程材料, 2013, 37(5): 69-72.
    shu
    WANG Xia, ZHANG Ren-yong, SHANGGUAN Chang-huai, CHEN Yong-bin. Corrosion Behaviour of Two Casing Steels in Simulative Oil Field Formation Water Containing CO2[J]. Materials and Mechanical Engineering, 2013, 37(5): 69-72.
    Citation: WANG Xia, ZHANG Ren-yong, SHANGGUAN Chang-huai, CHEN Yong-bin. Corrosion Behaviour of Two Casing Steels in Simulative Oil Field Formation Water Containing CO2[J]. Materials and Mechanical Engineering, 2013, 37(5): 69-72.
    shu

    两种套管钢在含CO2模拟油田地层水中的腐蚀行为

    Corrosion Behaviour of Two Casing Steels in Simulative Oil Field Formation Water Containing CO2

      摘要
    • 摘要: 在含CO2模拟油田地层水的腐蚀环境中, 研究了温度、CO2分压(pCO2)以及合金元素对L80和K55两种套管钢腐蚀速率的影响, 并对腐蚀形貌进行了观察。结果表明: 随温度和pCO2的升高, K55钢的腐蚀速率增大, 温度超过90°后腐蚀速率又有所降低, 而L80钢的腐蚀速率对温度和pCO2不敏感; L80和K55钢的最大腐蚀速率分别为0.162 5, 0.983 6 mm·a-1; 高铬含量使L80钢比K55钢具有更为优越的耐蚀性能; K55钢的腐蚀产物以形状规则、堆垛疏松的FeCO3为主, L80钢腐蚀后的表面只有极其微小的蚀坑。

       

      Abstract: The effects of temperature, partial pressure of CO2(pCO2) and alloying elements on corrosion rate of casing steels L80 and K55 in simulative oil field formation water containing CO2 were studied, and the corrosion morphology was observed .The results show that the corrosion rate of K55 steel increased with the increase of temperature and pCO2, and then decreased after temperature was over 90°, and L80 steel was not sensitive to temperature and pCO2. The maximum corrosion rate of L80 steel and K55 steel were 0.162 5, 0.983 6 mm·a-1, respectively. The corrosion resistance of L80 steel was superior to K55 steel because of high Cr content. The corrosion products of K55 steel was stacking-loose FeCO3 with regular shape, only tiny etch pit was found on L80 steel surface.

       

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