双缩合希夫碱耐温酸化缓蚀剂的合成及性能研究

魏晓静, 高秋英, 石鑫, 刘冬梅

doi:10.16577/j.issn.1001-1560.2022.0019

材料保护 >

2022 , Vol. 55 >Issue 1: 147 - 158

DOI: https://doi.org/10.16577/j.issn.1001-1560.2022.0019

工艺探讨

双缩合希夫碱耐温酸化缓蚀剂的合成及性能研究

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1. 中国石油化工股份有限公司西北油田分公司； 2. 中国石油化工集团公司碳酸盐岩缝洞型油藏提高采收率重点实验室

魏晓静(1986-)，高级工程师，研究方向为油气田腐蚀防护，E - mail：weixiaoj.xbsj@sinopec.com

收稿日期: 2021-07-28

修回日期: 2021-08-31

录用日期: 2021-09-30

网络出版日期: 2023-12-24

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Study on Synthesis and Properties of Double Condensed Schiff Base Corrosion Inhibitor for Temperature - Resistant Acidification

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1. Northwest Company of China Petroleum and Chemical Corporation, SINOPEC, Urumqi 830011, China;2. Key Laboratory of Enhanced Oil Recovery in Carbonate Fractured - Vuggy Reservoirs, CNPC, Urumqi 830011, China

Received date: 2021-07-28

Revised date: 2021-08-31

Accepted date: 2021-09-30

Online published: 2023-12-24

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摘要

为了解决原油开采中酸液腐蚀的问题，采用溶剂法合成出2种双缩合希夫碱缓蚀剂XFJ - 1、XFJ - 2。针对90 ℃、15%(质量分数)HCl的环境，通过静态失重法、极化曲线法等方法评价了其缓蚀性能，并采用模拟手段从分子层面解释了二者的缓蚀机理。结果表明：2种缓蚀剂在质量分数分别为1.0%时缓蚀效率分别可以达到82.90%和99.46%；并能同时抑制N80钢的阴、阳极反应；吸附形式均符合Langmuir吸附等温模型。模拟结果说明2种缓蚀剂分子主要通过苯环及C=N双键来接受或提供电子，XFJ - 2缓蚀剂的反应活性以及吸附能均大于XFJ - 1，表明XJF - 2的缓蚀效果比XJF - 1好，与试验数据相一致。

关键词： 希夫碱缓蚀剂; 失重法; 极化曲线; 交流阻抗谱; 模拟手段

本文引用格式

魏晓静, 高秋英, 石鑫, 刘冬梅 . 双缩合希夫碱耐温酸化缓蚀剂的合成及性能研究[J]. 材料保护, 2022 , 55(1) : 147 -158 . DOI: 10.16577/j.issn.1001-1560.2022.0019

Abstract

In order to solve the problem of acid corrosion in crude oil extraction, two double condensed Schiff base corrosion inhibitors XFJ - 1 and XFJ - 2 were synthesized by the solvent method. The corrosion inhibition performance at the environment of 90 ℃ and 15%(mass fraction) HCl was evaluated by static weightless method and polarization curve method, and the corrosion inhibition mechanism of XFJ - 1 and XFJ - 2 was explained by simulation method from the molecular level. Results showed that when the mass fraction of the two inhibition was 1.0%, respectively, the corrosion inhibition efficiency of the two corrosion inhibitors reached 82.90% and 99.46%, respectively, and simultaneously suppressed the cathodic and anodic reactions of N80 steel. The adsorption forms were consistent with the Langmuir adsorption isotherm model. The simulation results indicated that the corrosion inhibitor molecules would mainly accept or provide electrons through the benzene ring and the C=N double bond. The reactivity and adsorption energy of the XFJ - 2 corrosion inhibitor were greater than those of XFJ - 1, which was also consistent with the experimental data, indicating that the corrosion inhibition effect of XJF - 2 was better than that of XJF - 1.

Key words： Schiff base corrosion inhibitor; weight loss method; polarization curve; AC impedance; simulation method

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