摘要
聚环氧琥珀酸(PESA)作为绿色阻垢剂,具有较好的阻垢作用,但其缓蚀作用一般。为增强其缓蚀能力,采用L-半胱氨酸和氨基乙磺酸作为改性剂对PESA进行改性得到聚环氧琥珀酸衍生物PESA-Lcy-Sea,利用红外光谱仪(FTIR)和氢核磁共振谱仪(NMR)对PESA-Lcy-Sea的结构进行表征,通过热重分析(TGA)研究PESALcy-Sea的热稳定性,用失重法和电化学法探究PESA-Lcy-Sea的缓蚀性能,并以扫描电镜(SEM)和接触角对添加PESA-Lcy-Sea后Q235碳钢试片的形貌和表面变化情况进行分析。结果表明,PESA-Lcy-Sea具有PESA、L-半胱氨酸和氨基乙磺酸的结构官能团,合成成功,具有良好的热稳定性;PESA-Lcy-Sea在0.5 mol/L HCl溶液中对Q235钢有较好的缓蚀作用,在加药量为400 mg/L时,缓蚀率最高可达81.23%;PESA-Lcy-Sea分子在碳钢表面的吸附符合Langmuir吸附等温线;极化曲线证明了PESA-Lcy-Sea为混合型缓蚀剂;钢表面的SEM和接触角分析证明了PESALcy-Sea在其表面形成了保护膜,从而有效减缓了溶液对Q235钢的腐蚀。
Polyepoxysuccinic acid(PESA),as a green scale inhibitor,has good scale inhibition,but its corrosion inhibition is not so good.In order to enhance its corrosion inhibition ability,PESA was modified with L-cysteine and taurine as modifiers to obtain a polyepoxysuccinic acid derivative(PESA-Lcy-Sea).The structure of PESA-Lcy-Sea was characterized by infrared spectroscopy(FTIR)and hydrogen nuclear magnetic resonance spectroscopy(NMR).The thermal stability of PESA-Lcy-Sea was studied by thermogravimetric analysis(TGA),the corrosion inhibition performance of PESA-Lcy-Sea was investigated by weight loss method and electrochemical method,and the morphology and surface changes of Q235 carbon steel samples after adding PESA-Lcy-Sea were analyzed by SEM and contact angle.The results showed that PESA-Lcy-Sea had the structural functional groups of PESA,L-cysteine and taurine,which was successfully synthesized and had good thermal stability.PESA-Lcy-Sea had good corrosion inhibition on Q235 steel in 0.5 mol/L HCl solution,and the highest corrosion inhibition rate could reach 81.23%when the dosage was 400 mg/L.The adsorption of PESA-Lcy-Sea molecules on the surface of carbon steel conformed to the Langmuir adsorption isotherm.The polarization curve proved that PESA-Lcy-Sea was a mixed corrosion inhibitor.SEM and contact angle analysis of the steel surface proved that a protective film was formed on the surface by PESA-Lcy-Sea,which effectively slowed down the corrosion of Q235 steel in acid solution.
作者
刘会媛
柳鑫华
关俊霞
王瀛
舒世立
王磊
李雨龙
闫子萱
夏雨博
杜嘉瑞
周鑫
向和琼
张心媛
LIU Huiyuan;LIU Xinhua;GUAN Junxia;WANG Ying;SHU Shili;WANG Lei;LI Yulong;YAN Zixuan;XIA Yubo;DU Jiarui;ZHOU Xin;XIANG Heqiong;ZHANG Xinyuan(Department of Chemistry,Tangshan Normal University,Tangshan 063000,China;Hebei Key Laboratory of Degradable Polymers,Tangshan 063000,China)
出处
《工业水处理》
北大核心
2025年第3期137-143,共7页
Industrial Water Treatment
基金
河北省自然科学基金项目(D2022105004)
唐山师范学院重点培养项目(ZDPY07)
唐山师范学院博士基金项目(2018A07)。
关键词
聚环氧琥珀酸衍生物
碳钢
腐蚀
电化学
接触角
polyepoxysuccinic acid derivatives
carbon steel
corrosion
electrochemistry
contact angle
