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&nbsp;

江 波, 孙文寿, 蔡 杰

doi:10.16577/j.issn.1001-1560.2023.0004

材料保护 >

2023 , Vol. 56 >Issue 1: 22 - 29

DOI: https://doi.org/10.16577/j.issn.1001-1560.2023.0004

试验研究

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

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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

孙文寿(1961-)，博士，教授，研究方向为新型缓蚀剂研发，E-mail: wssun＠qdu.edu.cn

收稿日期: 2022-07-26

修回日期: 2022-08-24

录用日期: 2022-09-20

网络出版日期: 2023-07-25

基金资助

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

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

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1. College of Environmental Science and Engineering， Qingdao University， Qingdao 266071， China；2. Weifang CN-Energy Technology Co.， Ltd.， Weifang 261000， China

Received date: 2022-07-26

Revised date: 2022-08-24

Accepted date: 2022-09-20

Online published: 2023-07-25

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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。

关键词： 脂肪胺; 缓蚀剂; 吸附; EIS

本文引用格式

江波, 孙文寿, 蔡杰 . 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 [J]. 材料保护, 2023 , 56(1) : 22 -29 . DOI: 10.16577/j.issn.1001-1560.2023.0004

Abstract

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.

Key words： fatty amine; corrosion inhibitor; adsorption; EIS

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