Arshad Ifzan, Qureshi Khizar, Saleemi Awais Siddique, Abdullah Ali, Bahajjaj Aboud Ahmed Awadh, Ali Shafaqat, Bokhari Awais
Department of Chemistry, University of Management and Technology Sialkot Pakistan
Nano & Micro FT Laboratory, Program of Physics, University of Management and Technology Sialkot Campus Sialkot 51310 Pakistan.
RSC Adv. 2023 Jun 26;13(28):19301-19311. doi: 10.1039/d3ra00357d. eCollection 2023 Jun 22.
In the current study, 3,3',3''-((1,3,5-triazine-2,4,6-triyl)tris(azaneylylidene))tris(indolin-2-one) (MISB), which is the condensation product of melamine (triazine) and isatin, was investigated as a mild steel corrosion inhibitor in 0.5 M HCl. The ability of the synthesized tris-Schiff base to suppress corrosion was evaluated utilizing weight loss measurements, electrochemical techniques and theoretical computation. The maximum inhibition efficiency of 92.07%, 91.51% and 91.60% was achieved using 34.20 × 10 mM of MISB in weight loss measurements, polarization, and EIS tests, respectively. It was revealed that an increase in temperature decreased the inhibition performance of MISB, whereas an increase in the concentration of MISB increased it. The analysis demonstrated that the synthesized tris-Schiff base inhibitor followed the Langmuir adsorption isotherm and was an effective mixed-type inhibitor, but it exhibited dominant cathodic behavior. According to the electrochemical impedance measurements, the values increased with an increase in the inhibitor concentration. The weight loss and electrochemical assessments were also supported by quantum calculations and surface characterization analysis, and the SEM images showed a smooth surface morphology.
在本研究中，三聚氰胺（三嗪）与靛红的缩合产物3,3',3''-((1,3,5-三嗪-2,4,6-三基)三(氮亚烷基))三(吲哚啉-2-酮)(MISB)作为0.5 M盐酸中低碳钢的缓蚀剂进行了研究。利用失重测量、电化学技术和理论计算评估了合成的三席夫碱抑制腐蚀的能力。在失重测量、极化和电化学阻抗谱测试中，分别使用34.20×10 mM的MISB时，最大缓蚀效率分别达到92.07%、91.51%和91.60%。结果表明，温度升高会降低MISB的缓蚀性能，而MISB浓度增加则会提高其缓蚀性能。分析表明，合成的三席夫碱缓蚀剂遵循朗缪尔吸附等温线，是一种有效的混合型缓蚀剂，但表现出主要的阴极行为。根据电化学阻抗测量，随着缓蚀剂浓度的增加， 值增大。量子计算和表面表征分析也支持了失重和电化学评估，扫描电子显微镜图像显示表面形态光滑。
