Page 161 - 《精细化工》2019年第11期

第 36 卷第 11 期 精 细 化 工 Vol.36, No.11
2019 年 11 月 FINE CHEMICALS Nov. 2019

油田化学品与油品添加剂
耐高温抗 H S/CO 缓蚀剂的合成及评价
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张 宇 ，郭继香 ，杨矞琦 ，吴艳华 ，赵 清 ，高秋英
〔1. 中国石油大学（北京）非常规油气科学技术研究院，北京 102249；2. 中国石油化工股份有限公司西
北油田分公司，新疆 乌鲁木齐 830011〕
摘要：采用天然大分子壳寡糖、缩水甘油三甲基氯化铵、苯甲醛为原料，合成了绿色壳寡糖衍生物缓蚀剂（BHC）。
通过红外光谱、核磁共振氢谱对缓蚀剂 BHC 结构进行了表征。采用失重法、电化学法、扫描电镜、原子力显微
镜、接触角等对缓蚀剂 BHC 进行缓蚀性能评价和机理分析。得到的优化缓蚀剂 BHC 合成条件为 m(HTCOS)∶m(苯
甲醛)=1.0∶2.4，反应温度 80 ℃，反应时间 24 h。在总压为 15 MPa（H 2 S、CO 2 、N 2 分压分别为 1、5 和 9 MPa）
条件下，缓蚀剂 BHC 质量浓度为 100 mg/L 时，P110 钢片在 140 ℃、含 H 2 S/CO 2 腐蚀介质中的缓蚀率为 85.62%，
与市售缓蚀剂相比，BHC 缓蚀率提高 16.90%，可有效减缓高温高含 H 2 S/CO 2 腐蚀环境下钢材的腐蚀速率。缓蚀
剂 BHC 是一种偏阴极保护的混合型缓蚀剂，在金属表面的吸附行为符合 Langmuir 吸附等温式，与钢表面形成
稳定共价键，能很好保护钢管。
关键词：井筒腐蚀；缓蚀剂；硫化氢/二氧化碳腐蚀；壳寡糖；油田化学品
中图分类号：TG174.42; TE988.2 文献标识码：A 文章编号：1003-5214 (2019) 11-2309-08

Synthesis and Evaluation of High Temperature Resistant
H 2S/CO 2 Corrosion Inhibitor

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ZHANG Yu , GUO Ji-xiang , YANG Yu-qi , WU Yan-hua , ZHAO Qing , GAO Qiu-ying
（1. Unconventional Oil and Gas Science and Technology Research Institute, China University of Petroleum, Beijing 102249,
China; 2. Northwest Oilfield Branch, Sinopec Corp, Urumqi 830011, Xinjiang, China）
Abstract: The chitosan oligosaccharide derivative BHC as a green corrosion inhibitor for corrosion
inhibition was synthesized using natural macromolecular chitosan oligosaccharide, glycidyltrimethylammonium
chloride and benzaldehyde as raw materials. The corrosion inhibitor BHC was characterized by FTIR and
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HNMR. The inhibition performance and mechanism of BHC were evaluated by weight loss method,
electrochemical analysis, scanning electron microscope (SEM), atomic force microscopy (AFM) and
contact angle measurement. The results showed that the optimized synthesis conditions of BHC were
obtained as follows：m(HTCOS)∶m(benzaldehyde)=1.0∶2.4，reaction temperature 80 ℃ and reaction
time 24 h. When the total pressure was 15 MPa (the partial pressures of H 2S, CO 2 and N 2 were 1 MPa, 5
MPa and 9 MPa, respectively), the corrosion inhibition rate of BHC (100 mg/L) on P110 steel corrosion at 140
℃ in H 2S/CO 2 corrosive medium was 85.62%, 16.90% higher than that of commercial corrosion inhibitors,
which can effectively reduce the corrosion rate of P110 steel under high temperature and high H 2S/CO 2
corrosion environment. Corrosion inhibitor BHC was a mixed type corrosion inhibitor with predominant
control of cathodic reaction. The adsorption of BHC on the P110 steel surface obeyed the Langmuir
adsorption isotherm. And it formed a stable covalent bond with the steel surface, which can well protect the
steel pipe.
Key words: wellbore corrosion; corrosion inhibitor; H 2S/CO 2 corrosion; chitosan oligosaccharide; oil field
chemicals

收稿日期：2019-01-07; 定用日期：2019-04-25; DOI: 10.13550/j.jxhg.20190024
基金项目：“十三五”国家科技重大专项（2016ZX05014-005-009）；国家自然科学基金（51674274）
作者简介：张 宇（1990—），男，硕士生，E-mail：zhangyu_1020@outlook.com。联系人：郭继香（1965—），女，教授，博士生导
师，E-mail：guojx002@163.com。