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温度对SM80SS套管钢在CO_2/H_2S共存环境中的高温高压腐蚀行为影响

Total Corrosion Control(2009)

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Abstract
用失重法、扫描电镜(SEM)、X射线能谱(EDS)及X射线能谱(XRD)对温度对SM80SS特级抗硫套管钢在CO2/H2S共存条件下的腐蚀行为进行了试验研究,结果表明:在试验条件下,低温(40℃)时,腐蚀速率较小,腐蚀产物为FeCO3和FeS0.9,膜颗粒细小、比较致密,平均腐蚀速率较小;温度逐渐升高至100℃左右时,腐蚀产物为FeCO3和FeS0.9,膜颗粒粗大、疏松,平均腐蚀速率最大;高温(150℃)时,腐蚀速率较小,腐蚀产物为FeO(OH)和FeCO3、FeS0.9,膜颗粒较小、致密,但比低温时明显粗大,平均腐蚀速率较小;高低温时腐蚀产物都有较好的局部腐蚀阻碍作用,腐蚀形式为均匀腐蚀。
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Key words
CO2/H2S,corrosion product film,corrosion mechanism,temperature,SM80SS super anti-sulfide tubing steel
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