Kamel Medhat M, Rashwan Salah M, Mahmoud Mostafa A A, El-Mekawy Sameh A A, Awad Mohamed K, Ibrahim Hoyeda E
Department of Chemistry, Faculty of Science, Suez Canal University, Ismailia 41522, Egypt.
Department of Physics and Mathematics, Faculty of Engineering, Port Said University, Port Said 41522, Egypt.
ACS Omega. 2022 May 16;7(21):17609-17619. doi: 10.1021/acsomega.2c00153. eCollection 2022 May 31.
An ecofriendly resorcinol derivative, dimethyl-4,6-dihydroxyisophthalate (DDIP) is examined as an anticorrosion agent for low carbon steel (CS) in a 0.5 mol L HCl solution. Electrochemical and chemical methods are used to determine the effectiveness of the inhibitor. The DDIP compound decreased the rate of CS corrosion. The mitigation efficiency rose from 61.8 to 79.9% as the DDIP dose increased from 50 to 300 ppm in the corrosive medium. At 300 ppm, however, the efficiency decreased from 79.9 to 70.05% as the temperature increased from 25 to 55 °C. Physical quantities and thermodynamic parameters are discussed. The compound's adsorption follows Langmuir's concept. Adsorption of the DDIP compound is a mix of physisorption and chemisorption. The difference in values is less than 85 mV, indicating that the examined compound is a mixed-type inhibitor. Scanning electron microscopy and atomic force microscopy revealed the development of a coherent film at CS in the presence of the DDIP inhibitor. The results obtained using various techniques were closely related, indicating validity and accuracy. The interaction between the DDIP molecules and the CS was explained by the density functional theory and Monte Carlo simulation. The quantum characteristics confirmed that the DDIP compound is a promising inhibitor.
一种环境友好型间苯二酚衍生物，即4,6 - 二羟基间苯二甲酸二甲酯（DDIP），被作为低碳钢（CS）在0.5 mol/L盐酸溶液中的缓蚀剂进行研究。采用电化学和化学方法来确定该缓蚀剂的有效性。DDIP化合物降低了低碳钢的腐蚀速率。在腐蚀介质中，随着DDIP剂量从50 ppm增加到300 ppm，缓蚀效率从61.8%提高到79.9%。然而，在300 ppm时，随着温度从25℃升高到55℃，效率从79.9%降至70.05%。讨论了物理量和热力学参数。该化合物的吸附遵循朗缪尔概念。DDIP化合物的吸附是物理吸附和化学吸附的混合。 值的差异小于85 mV，表明所研究的化合物是混合型缓蚀剂。扫描电子显微镜和原子力显微镜显示在DDIP缓蚀剂存在下低碳钢表面形成了一层连贯的膜。使用各种技术获得的结果密切相关，表明其有效性和准确性。通过密度泛函理论和蒙特卡罗模拟解释了DDIP分子与低碳钢之间的相互作用。量子特性证实DDIP化合物是一种有前景的缓蚀剂。
