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首页> 外文期刊>Journal of Materials Engineering and Performance >Effect of Ti Microalloying on the Corrosion Behavior of Low-Carbon Steel in H2S/CO(2)Environment
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Effect of Ti Microalloying on the Corrosion Behavior of Low-Carbon Steel in H2S/CO(2)Environment

机译：Ti微合金对H2S / CO（2）环境低碳钢腐蚀行为的影响

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摘要

The corrosion behavior of two types of low-carbon steel (denoted steel A and steel B) in H2S/CO(2)was investigated through immersion tests, and the effect of Ti microalloying on the corrosion mechanism was analyzed. The microstructures, corrosion kinetics, corrosion surface morphologies, corrosion phases, cross-sectional morphologies and elemental distributions of the materials were studied by scanning electron microscopy (SEM), transmission electron microscopy (TEM), electron backscatter diffraction (EBSD), energy-dispersive spectroscopy (EDS), x-ray diffraction (XRD) and electron probe microanalysis (EPMA). The results showed that the corrosion rate of steel B with Ti microalloying was lower than that of steel A; the amount and formation rate of corrosion products in these two materials were different. As the immersion time increased, the corrosion products changed from iron-rich mackinawite to sulfur-rich pyrrhotite. In the early stage of corrosion, the corrosion products were primarily mackinawite, which controlled the corrosion phase through the entire process. After 384 h of immersion, pyrrhotite was observed, which can effectively protect the steel substrate, providing excellent corrosion resistance. The corrosion products in steel B with Ti microalloying were more compact than those in steel A. Moreover, Ti enrichment in the oxide film was observed in steel B, which can further improve its corrosion resistance. The results from this study can provide an important reference for the oil and gas industry.
机译：通过浸渍试验研究了两种类型的低碳钢（表示钢A和钢B）的腐蚀行为，分析了Ti微合金对腐蚀机制的影响。通过扫描电子显微镜（SEM），透射电子显微镜（TEM），电子反向散射衍射（EBSD），能量分散研究了材料的微观结构，腐蚀动力学，腐蚀表面形态，腐蚀阶段，横截面形态和元素分布。光谱学（EDS），X射线衍射（XRD）和电子探针微分析（EPMA）。结果表明，具有Ti微合金化的钢B的腐蚀速率低于钢A的腐蚀速率;这两种材料中腐蚀产物的量和形成速率不同。随着浸入时间的增加，腐蚀产品从富含铁富含铁富含硫的Pyrrhotite的腐蚀产品。在腐蚀的早期阶段，腐蚀产物主要是MackInawite，通过整个过程控制腐蚀阶段。在浸渍384小时后，观察到PyrrHotite，可有效保护钢基材，提供出色的耐腐蚀性。具有Ti微合金化的钢B中的腐蚀产物比钢铁A更紧凑。此外，在钢B中观察到氧化物膜中的Ti富集，这可以进一步提高其耐腐蚀性。本研究的结果可以为石油和天然气行业提供重要参考。

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