油水交替环境中咪唑啉对<strong>CO<sub>2</sub></strong> 腐蚀的抑制作用研究

doi:10.11902/1005.4537.2023.209

中国腐蚀与防护学报

2024, Vol. 44

Issue (3): 707-715 CSTR: 32134.14.1005.4537.2023.209 DOI: 10.11902/1005.4537.2023.209

研究报告

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油水交替环境中咪唑啉对CO₂ 腐蚀的抑制作用研究

欧阳嘉露¹, 王茜茜¹, 韩霞², 王子明¹(

)

1.厦门大学材料学院海洋材料腐蚀防护研究中心厦门 361005
2.中石化石油工程设计有限公司东营 257026

Inhibition of Imidazolines on CO₂ Induced Corrosion of Carbon Steel in Oil and Water Alternatively Wetting Conditions

OUYANG Jialu¹, WANG Xixi¹, HAN Xia², WANG Ziming¹(

)

1. Center for Marine Materials Corrosion and Protection, College of Materials, Xiamen University, Xiamen 361005, China
2. Sinopec Petroleum Engineering Design Co., Ltd., Dongying 257026, China

引用本文:

欧阳嘉露, 王茜茜, 韩霞, 王子明. 油水交替环境中咪唑啉对CO₂ 腐蚀的抑制作用研究[J]. 中国腐蚀与防护学报, 2024, 44(3): 707-715.
Jialu OUYANG, Xixi WANG, Xia HAN, Ziming WANG. Inhibition of Imidazolines on CO₂ Induced Corrosion of Carbon Steel in Oil and Water Alternatively Wetting Conditions[J]. Journal of Chinese Society for Corrosion and protection, 2024, 44(3): 707-715.

全文: PDF(8980 KB) HTML

摘要:

通过添加两类典型油溶性和水溶性咪唑啉缓蚀剂，检验了其在油水动态润湿环境中对碳钢CO₂腐蚀的抑制效果。研究表明，水溶性咪唑啉的缓蚀效果优于油溶性咪唑啉，其缓蚀效果差异主要源于油水界面行为的改变。油溶性咪唑啉分子通过增强油相中自修复作用来提高缓蚀效果；水溶性咪唑啉分子可以有效抑制油水界面水滴的形成和长大等过程，减弱CO₂对油膜的破坏作用，增强动态润湿缓蚀效果。

关键词 ： CO₂腐蚀, 咪唑啉类缓蚀剂, 油水交替润湿

Abstract：

Corrosion inhibitor is the most commonly used for corrosion control in oil production, but the relevant inhibition mechanism in complex CO₂ containing multiphase flow environment is still unclear. The effect of two typical oil-soluble and water-soluble imidazoline inhibitors on CO₂ induced corrosion of carbon steel in oil and water alternatively wetting conditions was investigated. It was found that the corrosion inhibition effect of the water-soluble imidazoline was better than that of the oil-soluble imidazoline, and the difference was mainly attributed to the performance of interface oil/water. The oil-soluble imidazoline molecules can improve the inhibition effect by enhancing the self-repair on the oil phase side, while the water-soluble imidazoline molecules can effectively inhibit the generation and growth of water droplets at the interface oil/water, weaken the rupture of CO₂ to the oil layer, and enhance the corrosion inhibition in dynamic wetting conditions.

Key words： CO₂ corrosion imidazoline inhibitor oil-water alternate wetting

收稿日期: 2023-07-01 32134.14.1005.4537.2023.209

ZTFLH:

TG174

基金资助:国家自然科学基金(52271075)

通讯作者: 王子明，E-mail：zmwang@xmu.edu.cn，研究方向为多相流腐蚀、碳捕集、利用与封存(CCUS)腐蚀等

Corresponding author: WANG Ziming, E-mail: zmwang@xmu.edu.cn

作者简介: 欧阳嘉露，女，1998年生，硕士生

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https://www.jcscp.org/CN/10.11902/1005.4537.2023.209 或 https://www.jcscp.org/CN/Y2024/V44/I3/707

图1 油溶性和水溶性咪唑啉的红外光谱图

图2 不同缓蚀剂添加体系中覆油RCE表面油膜破裂时间统计分析

图3 油膜破裂后RCE的局部腐蚀形态

图4 不同转速下RCE分别在不含缓蚀剂以及含油溶性和水溶性咪唑啉的碳酸化溶液体系中交替循环润湿30周期的恒电位极化电流-时间曲线，以及3种CO2饱和溶液体系中经过油水交替循环测试得出的缓蚀率(DME)

图5 动态接触角测量示意图与统计结果及静态油包水接触角测试图与统计结果

表1 100#矿物油和0.1 mol/L NaCl 溶液的Raman光谱信息

图6 含有水溶性咪唑啉的碳酸化系统中主相和油水界面的Raman光谱分峰

图7 不同条件下水和油Raman子峰的相对面积比(I)

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