高等学校化学学报 ›› 2019, Vol. 40 ›› Issue (8): 1706-1716.doi: 10.7503/cjcu20190017

• 物理化学 • 上一篇    下一篇

曲唑酮的两步法制备及对碳钢的缓蚀机理

马玉聪1, 樊保民1, 王满曼1, 杨彪1, 郝华2, 孙辉1, 张慧娟1   

  1. 1. 北京工商大学材料与机械工程学院, 北京 100048;
    2. 中国科学院化学研究所, 北京 100190
  • 收稿日期:2019-01-08 修回日期:2019-07-23 出版日期:2019-08-10 发布日期:2019-07-12
  • 通讯作者: 樊保民,男,博士,副教授,主要从事材料电化学研究.E-mail:fanbaomin@btbu.edu.cn;杨彪,男,博士,教授,主要从事材料表面与界面研究.E-mail:ybiao@btbu.edu.cn E-mail:fanbaomin@btbu.edu.cn;ybiao@btbu.edu.cn
  • 基金资助:
    国家自然科学基金(批准号:21606005,51473007,31570575)、北京市自然科学基金(批准号:2192016)和北京市属高校青年拔尖人才培育计划项目(批准号:CIT&TCD201904042)资助.

Two-step Preparation of Trazodone and Its Corrosion Inhibition Mechanism for Carbon Steel

MA Yucong1, FAN Baomin1, WANG Manman1, YANG Biao1, HAO Hua2, SUN Hui1, ZHANG Huijuan1   

  1. 1. School of Materials and Mechanical Engineering, Beijing Technology and Business University, Beijing 100048, China;
    2. Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
  • Received:2019-01-08 Revised:2019-07-23 Online:2019-08-10 Published:2019-07-12
  • Supported by:
    Supported by the National Natural Science Foundation of China(Nos.21606005, 51473007, 31570575), the Natural Science Foundation of Beijing, China(No.2192016) and the Project for Young Talent Cultivation in Beijing Municipal Universities, China(No.CIT&TCD201904042).

摘要: 以3-氯苯胺、N-氯丙基二乙醇胺和吡啶三唑酮为原料,两步法制备出曲唑酮(TZD).通过动态失重、极化曲线与电化学阻抗谱研究了TZD在0.5 mol/L盐酸溶液中对20#钢的缓蚀性能;借助扫描电子显微镜、原子力显微镜、衰减全反射红外光谱与吸附活化参数分析研究了TZD在碳钢表面的作用机理.结果表明,TZD可显著降低碳钢在盐酸溶液中的腐蚀速率,缓蚀率随TZD添加浓度的增加而增大,随温度升高而降低;298 K下,添加6 mmol/L TZD时,缓蚀率达95.8%;TZD可自发吸附组装于碳钢表面,同时抑制腐蚀反应的阴、阳极过程,显著增加界面极化阻抗;吸附为放热过程,符合Langmuir等温式.理论计算结果显示,TZD倾向以平行取向组装于碳钢表面.

关键词: 曲唑酮, 两步法制备, 缓蚀机理, 量子化学, 分子动力学模拟

Abstract: Trazodone(TZD) was prepared via a two-step method taking 3-chloroaniline, 2,2'-[(3-chloropropyl)azanediyl] diethanol and 1,2,4-triazolo[4,3-a] pyridin-3(2H)-one as raw materials. The corrosion inhibition effect of TZD for 20# mild steel in 0.5 mol/L hydrochloric acid solution was evaluated through mass loss method, potentiodynamic polarization and electrochemical impedance spectroscopy. The inhibition mechanism was also revealed by virtue of scanning electron microscopy(SEM), atomic force microscopy(ATM), attenuated total reflection infrared spectroscopy and adsorption activation parameters. The results indicated that the corrosion inhibition efficiency increased with increase of TZD concentration and decreased with increase of temperature, which could reach 95.8% at a dosage of 6 mmol/L under 298 K. TZD could spontaneously adsorb on the steel surface with the exothermic property, which obeyed Langmuir adsorption isotherm. The adsorption of TZD on the steel surface could depress the cathodic and anodic reactions accompanied with an enhancement of interfacial polarization resistance. TZD was inclined to parallelly adsorb on the steel surface based on theoretical calculations.

Key words: Trazodone, Two-step preparation, Corrosion inhibition mechanism, Quantum chemistry, Molecular dynamics simulation

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