肉桂醛壳聚糖席夫碱对N80钢的缓蚀行为评价  

Corrosion inhibition evaluation of cinnamaldehyde chitosan schiff-base for N80

作　　者：郑云香 王向鹏 张春晓 ZHENG Yun-xiang;WANG Xiang-peng;ZHANG Chun-xiao(School of Chemical Engineering,Shandong Institute of Petroleum and Chemical Technology,Dongying 257061,China)

机构地区：[1]山东石油化工学院化学工程学院,山东东营257061

出　　处：《化学研究与应用》2022年第9期2012-2018,共7页Chemical Research and Application

基　　金：东营市科学发展基金(DJ2021021)(DJ2021018)资助。

摘　　要：以肉桂醛改性壳聚糖制备了肉桂醛壳聚糖席夫碱(CACS),利用红外光谱、热重实验对其结构表征。利用失重实验、电化学极化曲线评价了其在1 mol/L氨基磺酸中对N80钢的缓蚀性能。结果表明在1 mol/L氨基磺酸中CACS能有效的抑制酸液对N80钢的腐蚀,当其浓度为1000 mg/L时,缓蚀率高达98.09%,属于混合抑制型缓蚀剂。吸附模型分析可知CACS在N80表面的吸附与Langmuir吸附模型相符,存在化学与物理两种吸附形式,且CACS加入后提高了腐蚀过程的活化能,减慢了腐蚀反应速率,抑制了N80钢的腐蚀。Cinnamaldehyde chitosan Schiff-base(CACS)was prepared from chitosan with cinnamaldehyde.Its structure was characterized by IR and TG.The corrosion inhibition of N80 steel in 1 mol·Lsulfonic acid was evaluated by weight loss experiment and electrochemical polarization curve.The results showed that CACS could inhibit the corrosion of N80 steel in 1 mol/L sulfonic acid effectively.When its concentration was 1000 mg/L,the corrosion inhibition rate was as high as 98.09%.CACS belonged to mixed inhibition inhibitor.According to the analysis of adsorption model,the adsorption of CACS on N80 surface was consistent with Langmuir adsorption model.There were two adsorption forms:chemical adsorption and physical adsorption.After the addition of CACS,the activation energy of corrosion process was improved,the corrosion reaction rate was slowed down and the dissolution of N80 steel was inhibited.

关 键 词：肉桂醛 壳聚糖 氨基磺酸 缓蚀性能 

分 类 号：TG174.2[金属学及工艺—金属表面处理]