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首页> 外文期刊>Corrosion Engineering, Science and Technology >Corrosion kinetics of pipeline carbon steel weld immersed in aqueous solution containing H2S
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Corrosion kinetics of pipeline carbon steel weld immersed in aqueous solution containing H2S

机译：浸泡在含H 2 S水溶液中的管道碳钢焊缝的腐蚀动力学

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摘要

One important challenge in the petroleum industry is reduce the problem produced by the corrosion of structures or pipeline steel caused by contact with the aggressive fluids, such as aqueous solution containing H2S or CO2. In this work, the corrosion of weldment of API X52 pipeline steel immersed in NACE solution saturated with H2S was studied. In the corrosion tests, the electrochemical techniques, polarisation curves and linear polarisation resistance were carried out in samples of API X52 pipeline steel focus in the three different zones of the weldment: heat affected zone, weld bead and base metal. In addition, a superficial analysis was made in order to identify the film of corrosion products. The temperature increment and the H2S dissolved in the NACE solution increase the corrosion rate of the three different zones. The heat affected zone was the more affected by the corrosion test and the phases mackinawite, troilite and pirrothite were identified in the film of corrosion products.
机译：石油工业的一项重要挑战是减少因与腐蚀性流体（例如含有H 2 S或CO 2 < / sub>。在这项工作中，研究了API X52管线钢在浸入H 2 S的NACE溶液中的焊缝的腐蚀。在腐蚀测试中，在API X52管线钢焦点的样品中，在焊接的三个不同区域（热影响区，焊缝和母材）中进行了电化学技术，极化曲线和线性极化电阻的测试。另外，进行了表面分析以鉴定腐蚀产物的膜。温度升高和NACE溶液中溶解的H 2 S会增加三个不同区域的腐蚀速率。热影响区受腐蚀试验的影响更大，并且在腐蚀产物膜中鉴定出了马氏体，三叶草和软锰矿的相。

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