Abdallah M, Soliman K A, Alshareef Mubark, Al-Gorair Arej S, Hawsawi H, Altass Hatem M, Al-Juaid Salih S, Motawea M S
Chem. Depart., Faculty of Appl. Sci., Umm Al-Qura University Makkah Saudi Arabia
Chem. Depart., Faculty of Sci., Benha University Benha Egypt.
RSC Adv. 2022 Jul 12;12(31):20122-20137. doi: 10.1039/d2ra03614b. eCollection 2022 Jul 6.
The anticorrosion efficiency of two polymer compounds, namely polystyrene (PS), polybutylene terephthalate (PBT), against the corrosion of SABIC iron (S-Fe) in 1.0 M HCl solution was investigated. The anticorrosion efficiency was estimated by chemical and electrochemical measurements. The anticorrosion efficiency increased with the increase in the concentration of the polymer compounds and reduction in temperature. All the obtained corrosion data confirmed the anticorrosion strength in the presence of PS and PBT compounds, such as the decreasing values of the corrosion current density, capacity of the double layer, and weight reduction, while the values of the charge-transfer resistance increased. Also, the pitting potential values moved in the noble (+) direction. The anticorrosion efficiency of the PBT compound was higher than that of the PS compound, which was 95.98% at 500 ppm concentration for PBT while for PS it was 93.34% according to polarization measurements. The anticorrosion activity occurred by the adsorption of PS and PBT compounds on the surface of S-Fe according to the Langmuir isotherm. The polarization curves indicated that the PS and PBT compounds were mixed-type inhibitors. Density functional theory (DFT) and Monte Carlo simulation (MC) were performed for the two polymer compounds. The computational quantum functions were found to be in agreement with the experimental results.
研究了两种聚合物化合物，即聚苯乙烯（PS）和聚对苯二甲酸丁二醇酯（PBT），在1.0 M HCl溶液中对沙特基础工业公司铁（S-Fe）腐蚀的防腐效率。通过化学和电化学测量来评估防腐效率。防腐效率随着聚合物化合物浓度的增加和温度的降低而提高。所有获得的腐蚀数据都证实了在PS和PBT化合物存在下的防腐强度，如腐蚀电流密度、双层电容和重量减轻值的降低，而电荷转移电阻值增加。此外，点蚀电位值向正向（+）移动。PBT化合物的防腐效率高于PS化合物，根据极化测量，PBT在500 ppm浓度下的防腐效率为95.98%，而PS为93.34%。根据朗缪尔等温线，PS和PBT化合物在S-Fe表面的吸附导致了防腐活性。极化曲线表明PS和PBT化合物是混合型缓蚀剂。对这两种聚合物化合物进行了密度泛函理论（DFT）和蒙特卡罗模拟（MC）。发现计算量子函数与实验结果一致。
