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Study on Corrosion Characteristics of Q235B Carbon Steel in Mixed Amine Absorbents

混合アミン吸収液中のQ235B炭素鋼の腐食特性に関する研究 (AI 翻訳)

Zhiping Hu, Haobo Ren, Hao Chen, Tianshun Zhou, Lei Yan, Xiaoli He, H. Liu, Shun-an Cao, Yubin Zeng

Processes📚 査読済 / ジャーナル2026-05-18#CCUSOrigin: CN
DOI: 10.3390/pr14101626
原典: https://doi.org/10.3390/pr14101626

🤖 gxceed AI 要約

日本語

本研究では、CCUSにおける混合アミン吸収液によるQ235B炭素鋼の腐食挙動を系統的に調査した。温度が主要因であり、腐食速度は温度上昇とともに増加した。CO2負荷量30 L/Lで腐食速度が最大となり、主な腐食生成物はFe3O4とFe2O3であった。これらの結果はCCUS設備の腐食防止に貢献する。

English

This study investigated the corrosion behavior of Q235B carbon steel in a mixed amine system for CCUS. Temperature was the dominant factor; corrosion rate increased with temperature. Under CO2-saturated conditions, the corrosion rate peaked at 30 L/L CO2 loading. The main corrosion products were Fe3O4 and Fe2O3, forming loose porous films. This provides data for corrosion prevention in CCUS equipment.

Unofficial AI-generated summary based on the public title and abstract. Not an official translation.

📝 gxceed 編集解説 — Why this matters

日本のGX文脈において

この研究はCCUS技術の実用化における重要な課題である配管や装置の腐食問題に取り組んでいる。日本のGX政策ではCCUSの推進が掲げられており、本研究成果は国内のCCUSプロジェクトの安定運転に寄与する可能性がある。

In the global GX context

This paper addresses a critical operational challenge in CCUS systems: corrosion of carbon steel by amine absorbents. As CCUS scales globally, understanding material degradation is essential for safe and cost-effective deployment. This study provides mechanistic insights that can inform equipment design and maintenance.

👥 読者別の含意

🔬研究者:Materials scientists and CCUS engineers can use the corrosion mechanisms to develop better inhibitors or materials.

🏢実務担当者:CCUS plant operators can use the corrosion rate data to schedule maintenance and select materials.

📄 Abstract（原文）

Against the global carbon neutrality backdrop, amine-based CO2 capture technology is critical for industrial greenhouse gas emission reduction. However, mixed amine absorbents can cause severe corrosion of Q235B carbon steel, restricting the stable operation of carbon capture, utilization, and storage (CCUS) projects. This study systematically investigated the corrosion behavior of Q235B carbon steel in a novel mixed amine system under simulated industrial conditions using weight loss tests, electrochemical measurements (EIS, potentiodynamic polarization), and advanced characterizations (FT-IR, 13C NMR, SEM-EDS, XRD). The temperature was the dominant factor: corrosion rate increased significantly with rising temperature. Under CO2-saturated conditions, 15–30% absorbent concentrations showed no significant effect on corrosion rate owing to similar molar loading and pH. At 60 °C and 30% concentration, the corrosion rate peaked at 30 L/L CO2 loading. Carbamate accumulation promoted corrosion at low loading, while increased bicarbonate inhibited corrosion at high loading. The main corrosion products (Fe3O4, Fe2O3) formed loose, porous films with poor protectiveness. This work clarifies the electrochemical corrosion mechanism and provides data support for corrosion prevention in CCUS equipment.

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