Liang Lihua, Ren Yuanyuan, Tian Yuan, Garcí José Alberto Alvarado, Zhang Pu, Zhu Xiaoli
College of Urban and Environmental Science, Northwest University, Xi'an, 710127, China.
Shaanxi Key Laboratory of Earth Surface System and Environmental Carrying Capacity, Xi'an, China.
Environ Sci Pollut Res Int. 2023 May;30(22):62590-62601. doi: 10.1007/s11356-023-26446-y. Epub 2023 Mar 22.
The corrosion behavior of Q235B carbon steel is investigated in water, LB medium, and oilfield produced water adding Pseudomonas fluorescens FSYZ01. After immersion at 30 °C for 13 days, the weight loss of carbon steel with this strain decreased by 32.23%, 54.07%, and 78.34%, respectively. X-ray diffraction (XRD) results show that P. fluorescens FSYZ01 inhibited conversion of iron oxides by hindering oxygen from approaching metal surface. Fourier transform infrared (FT-IR) and X-ray photoelectron spectrometer (XPS) results show that specific functional groups and bonds reacted with Fe(II/III) to form a dense and stable chelate-oxide protective layer, thereby inhibiting corrosion. Pyrolysis gas chromatography-mass spectrometer (Py-GCMS) results demonstrate the bacteria degraded C to C alkanes in oil. The inhibitory mechanism of crude oil-degrading bacteria P. fluorescens FSYZ01 on the carbon steel corrosion was proposed, so as to slow corrosion of oilfield produced water system pipeline and prolong its service life, helping to comprehend the microbial corrosion in the actual environment.
研究了Q235B碳钢在水、LB培养基以及添加荧光假单胞菌FSYZ01的油田采出水中的腐蚀行为。在30℃浸泡13天后，含有该菌株的碳钢失重分别降低了32.23%、54.07%和78.34%。X射线衍射（XRD）结果表明，荧光假单胞菌FSYZ01通过阻碍氧气接近金属表面抑制了铁氧化物的转化。傅里叶变换红外光谱（FT-IR）和X射线光电子能谱（XPS）结果表明，特定的官能团和化学键与Fe（II/III）反应形成致密且稳定的螯合物-氧化物保护层，从而抑制腐蚀。热解气相色谱-质谱联用仪（Py-GCMS）结果表明，该细菌将原油中的C降解为C烷烃。提出了原油降解菌荧光假单胞菌FSYZ01对碳钢腐蚀的抑制机制，以减缓油田采出水系统管道的腐蚀并延长其使用寿命，有助于理解实际环境中的微生物腐蚀。
