Aigbodion Victor Sunday, Dinneya-Onuoha Ekele
Faculty of Engineering and the Built Environment, University of Johannesburg P. O. Box 534, Auckland Park South Africa.
Department of Metallurgical and Materials Engineering, University of Nigeria Nsukka Postal Code 410001 Nigeria.
RSC Adv. 2024 Aug 5;14(34):24548-24560. doi: 10.1039/d4ra04283b.
This study investigates the development and efficacy of Zn-eggshell particle (ESAp) coatings on mild steel, utilizing starch extract as a modifier to enhance anti-corrosion properties. Coatings with varying ESAp content (0, 2, 4, 6, and 8%) and a fixed addition of 2% starch were successfully applied electrodeposition. The findings reveal that increasing the ESAp content results in thicker coatings, with the Zn-8% ESAp + 2% starch coating exhibiting the greatest thickness. SEM analysis confirmed the high quality of the coatings, showing no external surface defects. The Zn-8% ESAp + 2% starch-coated sample demonstrated a 46.45% increase in hardness (100.3 HB) and achieved superior corrosion protection efficiencies of 82.92% and 94.69% for Zn-8% ESAp and Zn-8% ESAp + 2% starch coatings, respectively. Electrochemical tests indicated that the coated samples shifted towards higher positive potential values, suggesting enhanced corrosion resistance. The results underscore the potential of using starch extract and waste eggshells to develop robust anti-corrosion coatings, with Zn-8% ESAp + 2% starch identified as the optimal formulation for superior protection and mechanical properties. Further research is recommended to explore the matrix-particle interactions and adhesion properties using advanced microscopic and electrochemical techniques.
本研究调查了锌-蛋壳颗粒（ESAp）涂层在低碳钢上的发展情况及其有效性，利用淀粉提取物作为改性剂来增强防腐性能。通过电沉积成功制备了具有不同ESAp含量（0%、2%、4%、6%和8%）且固定添加2%淀粉的涂层。研究结果表明，增加ESAp含量会使涂层变厚，其中含8% ESAp + 2%淀粉的锌涂层厚度最大。扫描电子显微镜（SEM）分析证实了涂层的高质量，表明其外表面无缺陷。含8% ESAp + 2%淀粉的锌涂层样品硬度提高了46.45%（达到100.3 HB），含8% ESAp的锌涂层和含8% ESAp + 2%淀粉的锌涂层的防腐效率分别达到了82.92%和94.69%，表现优异。电化学测试表明，涂覆样品的电位向更正的方向移动，表明其耐腐蚀性增强。研究结果强调了利用淀粉提取物和废弃蛋壳开发坚固防腐涂层的潜力，含8% ESAp + 2%淀粉的涂层被确定为具有卓越防护和机械性能的最佳配方。建议进一步开展研究，采用先进的微观和电化学技术探索基体与颗粒之间的相互作用及附着力特性。
