Ezzat Abdelrahman Osama, Aigbodion Victor Sunday, Al-Lohedan Hamad A, Ozoude Chinemerem Jerry
Surfactants Research Chair, Department of Chemistry, College of Sciences, King Saud University Riyadh 11451 Saudi Arabia.
Faculty of Engineering and the Built Environment, University of Johannesburg P. O. Box 534, Auckland Park South Africa
RSC Adv. 2024 Jun 10;14(26):18395-18405. doi: 10.1039/d4ra02362e. eCollection 2024 Jun 6.
Plant extracts used as corrosion inhibitor for mild steel usually degrade as the temperature increases above room temperature. In this study, we used (cashew leaf) extract to synthesize silver nanoparticles for improving mild steel's inhibition stability under salinized conditions. Cashew leaves were used as a reducing agent to synthesise silver nanoparticles. The functional group of the silver nanoparticles was determined using Fourier transform infrared spectroscopy. Electrochemical impedance spectroscopy and potentiodynamic polarisation were used to study the corrosion behaviour under simulated seawater by varying the silver nanoparticle concentration between 0.1 and 0.3 g L. Scanning electron microscopy and atomic force microscopy were used to obtain information about the surface of the corroded sample. The green silver nanoparticles reduced the corrosion of mild steel up to 90.5% at 40 °C and 90% at 80 °C. At 80 °C, the AgNPs are biochemically and thermally stable, exhibiting a 90% inhibition efficiency. It was established that silver nanoparticles from cashew leaves can be used to improve the stability of mild steel in simulated seawater.
用作低碳钢缓蚀剂的植物提取物通常会随着温度升高至室温以上而降解。在本研究中，我们使用（腰果叶）提取物合成银纳米颗粒，以提高低碳钢在盐化条件下的缓蚀稳定性。腰果叶被用作还原剂来合成银纳米颗粒。使用傅里叶变换红外光谱法测定银纳米颗粒的官能团。通过在0.1至0.3 g/L之间改变银纳米颗粒浓度，利用电化学阻抗谱和动电位极化法研究模拟海水中的腐蚀行为。使用扫描电子显微镜和原子力显微镜获取有关腐蚀样品表面的信息。绿色银纳米颗粒在40℃时将低碳钢的腐蚀降低了90.5%，在80℃时降低了90%。在80℃时，AgNPs具有生化和热稳定性，缓蚀效率达90%。已证实，腰果叶中的银纳米颗粒可用于提高低碳钢在模拟海水中的稳定性。
