5-环己基-1,3,5-三嗪-2-硫酮在NH4Cl溶液中对10号钢的缓蚀行为研究

尹成先, 班喜玲, 张娟涛, 徐秀清, 王远, 范磊, 张军平

doi:10.16577/j.issn.1001-1560.2022.0097

材料保护 >

2022 , Vol. 55 >Issue 4: 70 - 76

DOI: https://doi.org/10.16577/j.issn.1001-1560.2022.0097

试验研究

5-环己基-1,3,5-三嗪-2-硫酮在NH4Cl溶液中对10号钢的缓蚀行为研究

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1. 中国石油集团工程材料研究院有限公司； 2. 石油管材及装备材料服役行为与结构安全国家重点实验室； 3. 西北工业大学化学与化工学院

张军平(1979-)，副教授，博士，主要从事油田助剂的开发与研究，电话：13389254010，E-mail:zhangjunping@nwpu.edu.cn

收稿日期: 2021-10-26

修回日期: 2021-11-29

录用日期: 2021-12-14

网络出版日期: 2023-12-28

基金资助

石油管材及装备材料服役行为与结构安全国家重点实验室开放基金(2018 Z-01)；中石油科技开发项目(2017D-3108)资助

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Study on Corrosion Inhibition Behavior of 5 - Cyclohexyl - 1,3,5 - Triazinane - 2 - Thione for 10 Steel in NH4Cl Solution

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1. CNPC Tubular Goods Research Institute, Xi’an 710077, China; 2. State Key Laboratory for Performance and Structure Safety of Petroleum Tubular Goods and Equipment Materials, Xi’an 710077, China;3. School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi’an 710129, China

Received date: 2021-10-26

Revised date: 2021-11-29

Accepted date: 2021-12-14

Online published: 2023-12-28

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摘要

为了减缓加氢裂化过程中碳钢在氯化铵溶液中的腐蚀，开展了相关缓蚀剂的研究，以硫脲、甲醛和环己胺为原料合成了5-环己基-1,3,5-三嗪-2-硫酮，采用红外和1H NMR对其结构进行了表征；采用失重法和电化学方法考察了其在2%NH4Cl水溶液中对10号钢的缓蚀性能。结果表明：5-环己基-1,3,5-三嗪-2-硫酮在2%NH4Cl溶液中对10号钢的缓蚀性能随其添加量的增加而增大，随着温度的升高而降低。电化学分析结果表明该缓蚀剂在温度较低时为混合抑制型缓蚀剂，温度升高后为阴极抑制型缓蚀剂。5-环己基-1,3,5-三嗪-2-硫酮在2%NH4Cl溶液中与10号钢表面的吸附符合Langmuir吸附等温式，且为自发、放热过程。

关键词： 缓蚀剂; 合成; 电化学; 吸附等温式; 10号钢

本文引用格式

尹成先, 班喜玲, 张娟涛, 徐秀清, 王远, 范磊, 张军平 . 5-环己基-1,3,5-三嗪-2-硫酮在NH4Cl溶液中对10号钢的缓蚀行为研究[J]. 材料保护, 2022 , 55(4) : 70 -76 . DOI: 10.16577/j.issn.1001-1560.2022.0097

Abstract

In order to suppress the corrosion of carbon steel in ammonium chloride solution during hydrocracking, the relevant corrosion inhibitor was studied. 5-cyclohexyl-1,3,5-triazinane-2-thione was synthesized using thiourea, formaldehyde and cyclohexanamine as raw materials, and its structure was characterized using FTIR and 1H NMR. The corrosion inhibition performance of the product for 10 carbon steel in 2% NH4Cl solution was studied by weight loss method and electrochemical method. Results showed that the corrosion inhibition performance of 5-cyclohexyl-1,3,5-triazine-2-thione on 10 steel in 2% NH4Cl solution increased with the increase of its addition, and decreased with the increase of temperature. Electrochemical results showed that the corrosion inhibitor behaved as a mixed inhibitory type inhibitor at low temperature or a cathodic inhibitory inhibitor at high temperature. The adsorption of 5-cyclohexyl-1,3,5-triazinane-2-thione on the surface of 10 steel in 2% NH4Cl solution obeyed the Langmuir adsorption isotherm, and the adsorption belonged to spontaneous and exothermic processes.

Key words： corrosion inhibitor; synthesis; electrochemical; adsorption isotherm; 10 steel

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