Investigating the steel–cement interface in high-temperature, high-pressure carbon dioxide environments

IF 1.3 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Science-Poland Pub Date : 2024-03-21 DOI:10.2478/msp-2023-0045

Ge Zhu

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Abstract

This study investigates the impact of high-temperature, high-pressure carbon dioxide on the steel-cement interface, crucial in engineering structures and carbon capture storage systems. Experiments conducted on N80 steel and ordinary portland cement in synthetic aquifer brine revealed that CO2 exposure significantly exacerbates steel corrosion and cement degradation. The corrosion current density of steel increased to 1.2 μA/cm2 after six months in CO2, compared to 0.3 μA/cm2 in unexposed samples. Cement samples showed a marked decline in mechanical properties, with hardness reducing from 1.25 GPa (giga-Pascal) in control samples to 0.65 GPa after six months. The steel—cement interface integrity also diminished, as evidenced by a decrease in acoustic impedance from 45.0 M-Rayl to 34.0 M-Rayl over six months. These results emphasize the need for advanced materials and strategies to enhance the durability and safety of structures in CO2-rich environments.

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研究高温高压二氧化碳环境中的钢-水泥界面

本研究调查了高温高压二氧化碳对钢材-水泥界面的影响，这对工程结构和碳捕获存储系统至关重要。在合成含水层盐水中对 N80 钢和普通硅酸盐水泥进行的实验表明，二氧化碳暴露会显著加剧钢的腐蚀和水泥的降解。在二氧化碳中暴露 6 个月后，钢的腐蚀电流密度增至 1.2 μA/cm2，而未暴露样品的腐蚀电流密度仅为 0.3 μA/cm2。水泥样品的机械性能明显下降，硬度从对照样品的 1.25 GPa（千兆帕斯卡）降至六个月后的 0.65 GPa。钢-水泥界面的完整性也有所降低，六个月后声阻抗从 45.0 M-Rayl 降至 34.0 M-Rayl，就是证明。这些结果表明，需要采用先进的材料和策略来提高富二氧化碳环境中结构的耐久性和安全性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Materials Science-Poland MATERIALS SCIENCE, MULTIDISCIPLINARY-

自引率

18.20%

发文量

期刊介绍： Material Sciences-Poland is an interdisciplinary journal devoted to experimental research into results on the relationships between structure, processing, properties, technology, and uses of materials. Original research articles and review can be only submitted.