The effect of temperature, time and rotation speed of FT-GTL process water on the corrosion rate of API X-120 carbon steel was investigated. Electrochemical impedance spectroscopy and potentiodynamic polarization techniques were used to determine the carbon steel corrosion rate under temperatures ranging from 293 to 323 K and rotation speed of 0, 500, 1000, 2000 rpm when the immersion time was 0.5, 1, and 2 h. The corrosion rate increased with temperature and rotation speed but decreased with immersion time. SEM, XRD, and XPS analyses of the corroded surfaces confirmed the formation of iron oxide and ferric oxide as the main components of the protective layer.

中文翻译：

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API-X120碳钢合金在低COD浓度的GTL FT工艺水环境中的腐蚀行为

研究了FT-GTL工艺用水的温度，时间和转速对API X-120碳钢腐蚀速率的影响。当浸入时间为0.5、1和2小时时，使用电化学阻抗谱和电位动力学极化技术确定碳钢在293至323 K的温度和0、500、1000、2000 rpm的转速下的腐蚀速率。腐蚀速率随温度和转速的增加而增加，但随浸入时间的延长而减小。腐蚀表面的SEM，XRD和XPS分析证实形成了氧化铁和氧化铁作为保护层的主要成分。