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首页> 外文期刊>International Journal of Electrochemical Science >Effect of Cooling Rate on Microstructure and Corrosion Behavior of Low Alloy Steel under H2S/CO2-saturated Saline Solution Environment
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Effect of Cooling Rate on Microstructure and Corrosion Behavior of Low Alloy Steel under H2S/CO2-saturated Saline Solution Environment

机译：H 2 S / CO 2 饱和盐溶液环境下冷却速率对低合金钢组织和腐蚀行为的影响

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摘要

The effect of cooling rate on microstructure and corrosion behavior of low alloy steel exposed to H2S and CO2-saturated saline solution environment are investigated by means of immersion tests and electrochemical experiments. The microstructure, corrosion kinetics, surface morphology and cross- section morphology have been examined using optical microscope (OM), scanning electron microscope (SEM), energy-dispersive spectroscopy (EDS) and X-ray diffraction (XRD). The results show that the microstructure is refined with increasing cooling rate, the corrosion resistant performance is good. The corrosion products are FeCO3, mackinawite, troilite and pyrrhotite, and mackinawite dominates the corrosion phases. It is seen that there is very compact corrosion products formed on the sample surface with immersion time, which will lead to decrease corrosion rate and effectively protect the steel substrate.
机译：通过浸没试验和电化学实验，研究了冷却速率对暴露于H2S和CO2饱和盐溶液环境下的低合金钢组织和腐蚀行为的影响。使用光学显微镜（OM），扫描电子显微镜（SEM），能量色散光谱（EDS）和X射线衍射（XRD）对微观结构，腐蚀动力学，表面形貌和截面形貌进行了检查。结果表明，随着冷却速率的提高，组织得到细化，耐蚀性能良好。腐蚀产物为FeCO3，马基诺石，三叶草和黄铁矿，并且马基诺土占主导。可以看出，随着时间的推移，在样品表面上会形成非常致密的腐蚀产物，这将导致腐蚀速率降低，并有效地保护钢基材。

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