曼尼希碱缓蚀剂的合成及其缓蚀效果
Synthesis of Mannich Base Corrosion Inhibitor and Its Corrosion Inhibition Effect
摘 要
以甲醛、苄叉丙酮、对甲基苯胺为原料,通过曼尼希反应,制备了一种新型的曼尼希碱缓蚀剂(MHX),并采用正交试验优化了制备条件。采用静态失重法、电化学测试及分子动力学模拟的方法,研究了MHX添加量对N80钢片在HCl溶液中缓蚀效果的影响。结果表明:在90 ℃、添加1%MHX的20%HCl溶液中,N80钢片的腐蚀速率为2.6 g ·m-2 ·h-1,缓蚀率为99.63%; 该缓蚀剂是一种以抑制阳极为主的混合型缓蚀剂,可以大幅降低腐蚀电流密度,提高电极阻抗;MHX能够在N80钢表面吸附成膜,降低钢表面Fe的损耗,使其表面粗糙度降至93.81 nm; MHX分子在N80钢表面的吸附能为-7.59 eV,能有效取代H2O分子吸附在金属表面,从而起到缓蚀作用。
HCl溶液
缓蚀效果
分子动力学模拟
Mannich base
HCl solution
corrosion inhibition effect
molecular dynamics simulation
Abstract
A new Mannich base corrosion inhibitor (MHX) was prepared by Mannich reaction with formaldehyde, benzylideneacetone and p-methylaniline as raw materials. The preparation conditions were optimized by orthogonal test.The effects of MHX addition on the corrosion inhibition of N80 steel in HCl solution were studied by static weight loss method, electrochemical test and molecular dynamics simulation. The results showed that the corrosion rate of N80 steel sheet was 2.6 g ·m-2 ·h-1 and the corrosion inhibition rate was 99.63 % in 20 % HCl solution with 1% MHX at 90 ℃. The corrosion inhibitor was a mixed type corrosion inhibitor which mainly inhibited the anode, it could greatly reduce the corrosion current density and improve the electrode impedance. MHX could adsorb and form film on the surface of N80 steel, reduce the loss of Fe on the surface of steel, and reduce the surface roughness to 93.81 nm. The adsorption energy of MHX molecule on N80 steel surface was -7.59 eV, which could effectively replace H2O molecule and adsorb on the metal surface, thus playing a role in corrosion inhibition.
中图分类号 TG174 DOI 10.11973/fsyfh-202306012
所属栏目 应用技术
基金项目
收稿日期 2023/2/22
修改稿日期
网络出版日期
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联系人作者艾俊哲(aajzz@163.com)
引用该论文: WANG Zixuan,CHI Shen,LIU Jie,GAO Qiang,AI Junzhe. Synthesis of Mannich Base Corrosion Inhibitor and Its Corrosion Inhibition Effect[J]. Corrosion & Protection, 2023, 44(6): 75
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参考文献
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【2】艾俊哲,王欢,段立东.噻唑衍生物的缓蚀润滑性能及其在N80钢表面的吸附行为[J].腐蚀科学与防护技术,2019,31(5):501-507.
【3】刘博祥,许可,卢拥军,等.新型曼尼希碱缓蚀剂的合成及缓蚀机理研究[J].应用化工,2022,51(9):2548-2552.
【4】AL-SABBAGH A M,OSMAN M M,OMAR A M A,et al.Organic corrosion inhibitors for steel pipelines in oilfields[J].Anti-Corrosion Methods and Materials,1996,43(6):11-16.
【5】陈安德,刘峰,马建东,等.一种新型双曼尼希碱酸化缓蚀剂的研制及其作用机理[J].西安石油大学学报(自然科学版),2022,37(1):114-121.
【6】高强,程正骏,池伸,等.双组分环氧防腐蚀涂层的制备及其在西北油田酸性环境中的适应性评价[J].腐蚀与防护,2022,43(9):27-34.
【7】李善建,崔国涛,王梦忆,等.氯化钠对曼尼希碱型盐酸缓蚀剂缓蚀性能的影响[J].应用化工,2020,49(11):2784-2786.
【8】吕祥鸿,张晔,闫亚丽,等.两种新型曼尼希碱缓蚀剂的性能及吸附行为研究[J].中国腐蚀与防护学报,2020,40(1):31-37.
【9】KARTHIK G,SUNDARAVADIVELU M.Studies on the inhibition of mild steel corrosion in hydrochloric acid solution by atenolol drug[J].Egyptian Journal of Petroleum,2016,25(2):183-191.
【10】刘祥,梁雷,李善建,等.一种多元酸化缓蚀剂的制备及其性能研究[J].应用化工,2018,47(3):510-513.
【11】张萌,李清,张鲲,等.丙二胺型双曼尼希碱酸化缓蚀剂的缓蚀性能[J].腐蚀与防护,2022,43(6):26-32.
【12】ZHANG J, SONG Y P, SU H J, et al. Investigation of DiospyrosKaki Lf husk extracts as corrosion inhibitors and bactericide in oil field[J]. Chemistry Central Journal, 2013,7(1):1-6.
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【14】赵海洋,石鑫,刘冬梅,等.适用高温、高Cl-工况下的缓蚀剂合成及评价[J].油田化学,2020,37(1):155-158,177.
【15】董笑程,刘冠豪,杨敬一,等.双曼尼希碱缓蚀性能的量子化学研究[J].石油学报(石油加工),2023,39(1):142-155.
【16】TOUHAMI F,AOUNITI A,ABED Y,et al.Corrosion inhibition of armco iron in 1 M HCl media by new bipyrazolic derivatives[J].Corrosion Science,2000,42(6):929-940.
【17】苏铁军,罗运柏,李克华,等.苯并咪唑-N-曼尼希碱对盐酸中N80钢的缓蚀性能[J].中国腐蚀与防护学报,2015,35(5):415-422.
【18】余菲菲,吕涯,范海波.吗啉系缓蚀剂分子结构、缓蚀效果及分子动力学模拟[J].石油炼制与化工,2022,53(1):29-35.
【19】程正骏,段立东,池伸,等.四元复合型缓蚀剂在中性NaCl溶液中对碳钢的缓蚀作用[J].腐蚀与防护,2021,42(1):7-12.
【20】魏晓静,石鑫,葛鵬莉,等.改性咪唑啉类缓蚀剂缓蚀机理的分子模拟[J].分子科学学报,2021,37(4):352-359.
【21】薛丹,张硕硕,朱明明,等.一种新型高温酸化缓蚀剂的制备及性能[J].腐蚀与防护,2022,43(3):36-41.
【22】童欣,张光华,张万斌,等.一种新型联苯双子季铵盐缓蚀剂的合成及性能研究[J].应用化工,2021,50(10):2635-2640.
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