Chemical Engineering Section, Faculty of Engineering, Sohar University, Sohar, P C-311, Oman.
Chemical Engineering Section, Faculty of Engineering, Sohar University, Sohar, P C-311, Oman.
Chemosphere. 2022 Apr;292:133479. doi: 10.1016/j.chemosphere.2021.133479. Epub 2021 Dec 31.
Carbon based compounds have gained significant attention due to their environmental engineering applications with their favorable physical and chemical properties. Chitosan, a naturally available carbon based biopolymer, is identified as a potential surface protective agent and tested for its surface coverage properties to control the corrosion of mild steel. Chitosan nanoparticles (Ch-NP) were produced using a simple two-step synthesis to produce a corrosion protection agent for mild steel in 3.5% NaCl. The effect of immersion duration (4-24 h) was investigated using inhibitor extracts containing 400, 600, 800, and 1000 ppm at three temperatures, namely,305.15, 310.15, and 315.15 K. Inhibition efficiency increased with increase in the inhibitor dosage due to the development of protective surface film. An integrated electrochemical study was performed using electrochemical impedance spectroscopy, potentiodynamic polarization, and gravimetric measurement. Ch-NP has a mixed-type adsorption behavior for mild steel surface. The Langmuir isotherm was used to characterize the adsorption of Ch-NP molecules on the surface of mild steel. Tafel study confirmed the inhibitor examined as mixed type. Ch-NP demonstrated a high inhibitory effectiveness of 91% under the tested conditions and proved to be an effective alternative for industrial applications.
由于其具有良好的物理和化学性质，在环境工程应用方面，碳基化合物受到了广泛关注。壳聚糖是一种天然存在的碳基生物聚合物，被认为是一种有潜力的表面保护剂，并对其表面覆盖性能进行了测试，以控制低碳钢的腐蚀。采用简单的两步法合成壳聚糖纳米粒子（Ch-NP），在 3.5%NaCl 中制备出一种用于保护低碳钢的腐蚀抑制剂。研究了浸泡时间（4-24 h）的影响，抑制剂提取物中含有 400、600、800 和 1000 ppm 的抑制剂，在三个温度下，即 305.15、310.15 和 315.15 K 下进行实验。由于形成了保护性表面膜，随着抑制剂用量的增加，缓蚀效率也随之增加。采用电化学阻抗谱、动电位极化和重量法进行了综合电化学研究。Ch-NP 对低碳钢表面表现出混合吸附行为。Langmuir 等温线用于表征 Ch-NP 分子在低碳钢表面的吸附。塔菲尔研究证实了所研究的抑制剂为混合型。在测试条件下，Ch-NP 表现出 91%的高抑制效率，证明其是工业应用的有效替代品。
