N-油基-1,3-丙撑二胺在盐酸环境中对20钢的缓蚀性能及机理研究  

Study on the Corrosion Inhibition Performance and Mechanism of N-Oleyl-1,3-Propanediamine on 20 Steel in HCl Environment

作　　者：江波 孙文寿 蔡杰 JIANG Bo;SUN Wen-shou;CAI Jie(College of Environmental Science and Engineering,Qingdao University,Qingdao 266071,China;Weifang CN-Energy Technology Co.,Ltd.,Weifang 261000,China)

机构地区：[1]青岛大学环境科学与工程学院,山东青岛266071 [2]潍坊西恩能源技术有限公司,山东潍坊261000

出　　处：《材料保护》2023年第1期22-29,共8页Materials Protection

基　　金：青岛赛诺威尔工业水处理有限公司科技项目(20183702032102)资助。

摘　　要：为了提高有机胺缓蚀剂对金属的防护性能,研发了以N-油基-1,3-丙撑二胺与二乙氨基乙醇为主剂的环保缓蚀剂FFA。通过静态失重法探究了FFA在1 mol/L HCl的环境中对20钢的缓蚀效果,利用电化学工作站,接触角测试、扫描电镜(SEM)和原子力显微镜(AFM)测试了在不含和含有FFA的盐酸溶液中20钢样品的阻抗值以及腐蚀后样品的表面疏水性、微结构和粗糙度。结果表明:在温度为343 K,FFA投加量为5 g/L时,缓蚀率最高达94.5%。FFA在20钢表面的吸附过程是吸热过程,符合Langmuir等温吸附模型。添加FFA的实验组的20钢表面形成了一层均匀的疏水膜。FFA对20钢具有优异的缓蚀性能,缓蚀机理为物理吸附和化学吸附共同作用。In order to improve the protective performance of organic amine corrosion inhibitor on metals, an environment-friendly corrosion inhibitor FFA based on N-oleyl-1,3-propanediamine and diethylaminoethanol was developed. The corrosion inhibition effect of such FFA on 20 steel in 1 mol/L HCl was explored by static weight loss method. Moreover, the corrosion inhibition performance of FFA as well as the surface hydrophobicity, microstructure and roughness of 20 steel specimen took out from FFA in HCl solution were analyzed by static weight loss experiment, contact angle test, scanning electron microscopy(SEM), atomic force microscopy(AFM) and electrochemical workstation. Results showed that the corrosion inhibition efficiency reached the highest value of 94.5% when the FFA dosage was 5 g/L and the temperature was 343 K. The adsorption process of FFA on the surface of 20 steel was endothermic and conformed to the Langmuir isotherm model. Besides, a uniform hydrophobic film was formed on the surface of 20 steel after an immersion in FFA solution. FFA had excellent corrosion inhibition performance on 20 steel, and the inhibition mechanism was the combination of physical and chemical adsorptions.

关 键 词：脂肪胺 缓蚀剂 吸附 EIS 

分 类 号：TG174.42[金属学及工艺—金属表面处理]