Synthesis and theoretical studies of novel conjugated polyazomethines and their application as efficient inhibitors for C1018 steel pickling corrosion behavior

被引:46
作者
Abd El-Lateef, Hany M. [1 ,2 ]
Sayed, Abdelwahed R. [1 ,3 ]
Shalabi, K. [4 ]
机构
[1] King Faisal Univ, Coll Sci, Dept Chem, POB 400, Al Hasa AHSA 31982, Saudi Arabia
[2] Sohag Univ, Fac Sci, Chem Dept, Sohag 82524, Egypt
[3] Beni Suef Univ, Fac Sci, Chem Dept, Bani Suwayf 62514, Egypt
[4] Mansoura Univ, Fac Sci, Chem Dept, Mansoura, Egypt
关键词
Polyazomethines; Inhibition; Surface morphology; Theoretical study; Acidic corrosion; ELECTROCHEMICAL FREQUENCY-MODULATION; MILD-STEEL; CARBON-STEEL; SCHIFF-BASE; N80; STEEL; ACIDIC MEDIA; HCL SOLUTION; DERIVATIVES; PERFORMANCE; POLYMERS;
D O I
10.1016/j.surfin.2021.101037
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The idea of the existing work is to progress the preparation of four conjugated polyazomethines contained thiazole through the backbone of the polymer. The synthesized conjugated polyazomethines were categorized and assessed as novel inhibitors for the C1018 steel pickling corrosion behavior at 298-328 K using surface morphology of C1018 steel electrode, potentiodynamic polarization (PDP), and electrochemical impedance spectroscopy (EIS). The assessed polymers performed as effective inhibitors for C1018 steel corrosion in pickling solution. The protection capacity of the polyazomethines augmented with a rise in concentration to attain 98.2% efficacy with 150 mg L-1 at 298 K. PDP plots designated that the conjugated polyazomethines performs as mixed-type inhibitors and adsorbed on the C1018 steel interface via chemisorption. Isotherm model of Langmuir was found the preeminent mode for the adsorption of polymers. The surface morphology examinations established the development of a protective layer getting a thick coverage at the optimal dose. Moreover, theoretical study of Monte Carlo (MC) simulations and density functional theory (DFT) were used to govern the association among protection capacity and molecular structure. This study could be provided novel polyazomethines inhibitors for C1018-steel corrosion protection in different industrial environments, especially in the pickling solution.
引用
收藏
页数:16
相关论文
共 87 条