首页> 外文期刊>International Journal of Electrochemical Science >Corrosion Behaviour of 2205 Duplex Stainless Steel in Oilfield Production Fluid Containing Sulphate-reducing Bacteria
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Corrosion Behaviour of 2205 Duplex Stainless Steel in Oilfield Production Fluid Containing Sulphate-reducing Bacteria

机译:2205双相不锈钢在含硫酸盐还原菌的油田生产液中的腐蚀行为

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The corrosion behaviour of 2205 duplex stainless steel (DSS) in sulphate reducing-bacteria (SRB)-freeand SRB-containing oil-field production fluid are performed via electrochemical techniques,microscopic imaging, and X-ray photoelectron spectroscopy (XPS). The results show that thecorrosion morphology of 2205 DSS in oil field production fluid is pitting corrosion, and the pitbecomes deeper in case of bacteria. The corrosion mechanism of 2205 DSS varies depending on theSRB growth stage. Corrosion is inhibited in the steady growth stage, but it is greatly accelerated duringthe other stages. Observed results of XPS demonstrate that the passivation film obtained in thepresence of SRB comprises sulphides of Cr and Fe. The sulphide-containing passivation film is moreeasily penetrable by aggressive anion and the local corrosion is accelerated compared to the sulphide-free passivation film.
机译:通过电化学技术,显微成像和X射线光电子能谱(XPS)对2205双相不锈钢(DSS)在无硫酸盐还原细菌(SRB)和含SRB的油田采出液中的腐蚀行为进行了研究。结果表明:2205 DSS在油田采出液中的腐蚀形态为点蚀,在细菌的作用下,点蚀变深。 2205 DSS的腐蚀机理取决于SRB的生长阶段。腐蚀在稳定的生长阶段被抑制,但在其他阶段则大大加速了。 XPS的观察结果表明,在SRB存在下获得的钝化膜包含Cr和Fe的硫化物。与不含硫化物的钝化膜相比,含硫化物的钝化膜更容易被侵蚀性阴离子渗透,并且局部腐蚀得以加速。

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