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首页> 外文期刊>International Journal of Electrochemical Science >Corrosion Inhibitive Effect of Synthesized Thiourea Derivatives on Mild Steel in a 15% HCl Solution
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Corrosion Inhibitive Effect of Synthesized Thiourea Derivatives on Mild Steel in a 15% HCl Solution

机译：15％HCl溶液中合成的硫脲衍生物在温和钢上的腐蚀抑制作用

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摘要

In this study, the inhibitive performance of two synthesized thiourea derivatives, namely, 1-(3- mercapto-5-(pyridin-4-yl)-4H-1,2,4-triazol-4-yl)-3-phenylthiourea (MPTP), 1-(3-mercapto-5-(pyridin- 4-yl)-4H-1,2,4-triazol-4-yl)-3-(4-methoxyphenyl) thiourea (MPTMP) were studied for mild steelcorrosion in a 15% HCl solution using weight loss measurements, potentiodynamic polarization, andelectrochemical impedance spectroscopy (EIS) techniques. The inhibition efficiency of both theinhibitors increased with an increase in the concentration of inhibitor. The inhibitors MPTP andMPTMP show a corrosion inhibition efficiency of 94.3% and 96.8% respectively, in 50 ppmconcentrations at 303 K. Polarization studies showed that both inhibitors studied were of a mixed typein nature. The adsorption of inhibitors on the mild steel surface obey the Langmuir adsorptionisotherm. Scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), UV- Visible spectroscopy, and atomic force microscopy (AFM) were performed for a surface study ofuninhibited and inhibited mild steel samples. The semi-empirical AM1 method was employed fortheoretical calculations.
机译：在本研究中，两个合成的硫脲衍生物的抑制性能，即1-（3-巯基-5-（吡啶-4-基）-4H-1,2,4-三唑-4-基-3-苯基硫脲（MPTP），1-（3-巯基-5-（吡啶-4-基）-4H-1,2,4-三唑-4-基硫脲）-3-（4-甲氧基苯基）硫脲（MPTMP）进行研究使用重量损失测量，电位偏振和电化学阻抗光谱（EIS）技术的15％HCl溶液中温和的钢腐蚀。抑制剂的抑制效率随着抑制剂浓度的增加而增加。抑制剂MPTP和MPTMP分别显示出94.3％和96.8％的腐蚀抑制效率，在50ppmconcoctration下，在303k k的50 ppmconcentration中。偏振研究表明，所研究的两种抑制剂都是混合型性质。抑制剂对低碳钢表面的吸附性遵循朗米尔吸附isothisotm。扫描电子显微镜（SEM），能量分散X射线光谱（EDX），UV-可见光谱学和原子力显微镜（AFM）进行了禁止和抑制温和钢样品的表面研究。半经验am1方法转动效应计算。

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