EFFECT OF ACETIC ACID ON CO2 CORROSION OF CARBON STEEL IN VAPOR-WATER TWO-PHASE HORIZONTAL FLOW
EFFECT OF ACETIC ACID ON CO2 CORROSION OF CARBON STEEL IN VAPOR-WATER TWO-PHASE HORIZONTAL FLOW
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DOI：
10.1080/00986440600642975
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发表时间：
2007-01
影响因子：
2.5
通讯作者：
P. Okafor;S. Nešić
中科院分区：
文献类型：
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作者：
P. Okafor;S. Nešić
采用电化学和质量损失技术，在低压-高温多相流水平回路中，在 2 bar 总压、1.54 bar CO2 分压、pH 5.5 和 80°C 条件下，研究了乙酸对 X 65 和 C 1018 碳钢在汽水两相分层流（Vsg：2 m/s；Vsl：0.1 m/s）中的腐蚀行为的影响。液相由含有不同浓度乙酸（总乙酸500至5000 ppm）的1% NaCl水溶液组成，气相由CO2-乙酸-水蒸气混合物组成。生产线顶部和底部的腐蚀速率随着乙酸浓度的增加而增加，这归因于游离乙酸对阴极反应的氢离子的贡献。据报道，生产线顶部和底部的金属表面被 FeCO3 部分覆盖，这是造成观察到的局部腐蚀的原因。报告了使用 SEM 和 XRD 进行的表面分析。为所研究的系统开发了气液平衡模型。
The effect of acetic acid on the corrosion behavior of X 65 and C 1018 carbon steel in vapor-water two-phase stratified flow (Vsg: 2 m/s; Vsl: 0.1 m/s) at 2 bars total pressure, 1.54 bars CO2 partial pressure, pH 5.5, and 80°C was studied in a low pressure-high temperature multiphase flow horizontal loop using electrochemical and mass loss techniques. The liquid phase is composed of 1% NaCl aqueous solution containing different concentrations of acetic acid (500 to 5000 ppm total acetic acid), and the gas phase is composed of CO2-acetic acid-water vapor mixture. The corrosion rates, on both the top and bottom of the line, increase with increase in acetic acid concentration, which was attributed to the contribution of hydrogen ions by the free acetic acid to the cathodic reaction. Partial coverage of the metal surface by FeCO3 on both the top and bottom of the line is reported to be responsible for the observed localized corrosion. Surface analysis investigated with SEM and XRD is reported. A vapor-liquid equilibrium model was developed for the system studied.