5-环己基-1,3,5-三嗪-2-硫酮在NH_(4)Cl溶液中对10号钢的缓蚀行为研究  

Study on Corrosion Inhibition Behavior of 5-Cyclohexyl-1,3,5-Triazinane-2-Thione for 10 Steel in NH_(4)Cl Solution

作　　者：尹成先 班喜玲 张娟涛 徐秀清 王远 范磊 张军平[3] YIN Cheng-xian;BAN Xi-ling;ZHANG Juan-tao;XU Xiu-qing;WANG Yuan;FAN Lei;ZHANG Jun-ping(CNPC Tubular Goods Research Institute,Xi’an 710077,China;State Key Laboratory for Performance and Structure Safety of Petroleum Tubular Goods and Equipment Materials,Xi’an 710077,China;School of Chemistry and Chemical Engineering,Northwestern Polytechnical University,Xi’an 710129,China)

机构地区：[1]中国石油集团工程材料研究院有限公司,陕西西安710077 [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,陕西西安710077 [3]西北工业大学化学与化工学院,陕西西安710129

出　　处：《材料保护》2022年第4期70-76,共7页Materials Protection

基　　金：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。

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^(1)H 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%NH_(4)Cl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%NH_(4)Cl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%NH_(4)Cl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。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 ^(1)H NMR.The corrosion inhibition performance of the product for 10 carbon steel in 2%NH_(4)Cl 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%NH_(4)Cl 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%NH_(4)Cl solution obeyed the Langmuir adsorption isotherm,and the adsorption belonged to spontaneous and exothermic processes.

关 键 词：缓蚀剂 合成 电化学 吸附等温式 10号钢 

分 类 号：TG174.42[金属学及工艺—金属表面处理]