Deyab M A, Mohsen Q, El-Shamy Omnia A A
Egyptian Petroleum Research Institute, Nasr City, Cairo 11727, Egypt.
Department of Chemistry, College of Science, Taif University, Taif, Saudi Arabia.
Int J Biol Macromol. 2025 Sep;321(Pt 2):146384. doi: 10.1016/j.ijbiomac.2025.146384. Epub 2025 Jul 29.
Although the desalination sector uses carbon steel extensively, it is crucial to put in place efficient anti-corrosion methods to shield these parts from the hazardous sea environment. In the current work, the magnetite-chitosan nanocomposite (MCS) was used to enhance the anti-corrosion durability of an epoxy resin coating for carbon steel in the desalination harsh marine environment. Magnetite and chitosan, a biopolymer derived from chitin, are combined to form a nanocomposite with promising anti-corrosion properties. The co-precipitation technique is utilized to synthesize MCS nanocomposite. X-ray diffraction (XRD), Transmission electron microscopy (TEM), dispersive light scattering (DLS), FT-IR and energy dispersive X-ray (EDX) determine the morphology of MCS. Electrochemical and surface investigations assess and compare the anti-corrosion capabilities of the epoxy/MCS coatings to pure epoxy coating in desalination harsh marine environment. The epoxy/MCS coating results in a 98.7 % decrease in corrosion current density. According to electrochemical impedance spectroscopy (EIS), the epoxy/MCS coating has much better anti-corrosion capabilities than neat epoxy and epoxy/magnetite because it displays a substantially bigger capacitive semi-circle. The remarkable mechanical properties of the epoxy/MCS coating are indicated by its significant values of scratch hardness, and impact strength. Epoxy/MCS coating improved pull-off adhesion performance from 3.4 MPa to 7.9 MPa.
尽管海水淡化行业广泛使用碳钢，但采取有效的防腐方法来保护这些部件免受恶劣海洋环境的影响至关重要。在当前的工作中，磁铁矿-壳聚糖纳米复合材料（MCS）被用于提高环氧树脂涂层在海水淡化恶劣海洋环境中对碳钢的耐腐蚀耐久性。磁铁矿和壳聚糖（一种由甲壳素衍生的生物聚合物）结合形成具有良好防腐性能的纳米复合材料。利用共沉淀技术合成MCS纳米复合材料。通过X射线衍射（XRD）、透射电子显微镜（TEM）、分散光散射（DLS）、傅里叶变换红外光谱（FT-IR）和能量色散X射线（EDX）来确定MCS的形态。通过电化学和表面研究来评估和比较环氧/MCS涂层与纯环氧涂层在海水淡化恶劣海洋环境中的防腐能力。环氧/MCS涂层使腐蚀电流密度降低了98.7%。根据电化学阻抗谱（EIS），环氧/MCS涂层比纯环氧涂层和环氧/磁铁矿涂层具有更好的防腐能力，因为它显示出明显更大的电容半圆。环氧/MCS涂层显著的划痕硬度和冲击强度值表明其具有卓越的机械性能。环氧/MCS涂层将拉伸附着力性能从3.4MPa提高到了7.9MPa。
