Sanni Omotayo, Ren Jianwei, Jen Tien-Chien
Department of Mechanical Engineering Science, University of Johannesburg, Cnr Kingsway and University Roads, Johannesburg, South Africa.
Front Chem. 2024 May 14;12:1396565. doi: 10.3389/fchem.2024.1396565. eCollection 2024.
Each year, the rising demand for palm oil generates large amounts of palm kernel shell waste. Discarded palm kernel shells can produce activated carbon, crushed shells, liquified fumes, and other derivatives; however, their indiscriminate disposal persists, raising issues related to the environment and economy. Therefore, the purpose of this study is to investigate the use of palm kernel shell as a corrosion inhibitor for thermo-mechanically treated steel in a seawater environment using gravimetric and electrochemical techniques, as well as surface tests at varying concentrations. The findings demonstrated that the palm kernel shell inhibited the cathodic and anodic processes by adsorption on the steel surface, which followed the Langmuir adsorption isotherm. The inhibitor exhibited a 98% inhibitory efficiency at 500 ppm concentration. Scanning electron microscopy analysis verified the thin films of the inhibitor on steel surface in seawater solution. Fourier transform infrared spectroscopy results show that the extract's components prevent the steel corrosion through an adsorptive mechanism. According to the inhibitor economic evaluation, employing the palm kernel shell extract is less expensive than utilizing conventional inhibitors.
每年，对棕榈油不断增长的需求产生了大量的棕榈仁壳废料。废弃的棕榈仁壳可以生产活性炭、碎壳、液化烟气和其他衍生物；然而，它们的随意处置情况仍然存在，引发了与环境和经济相关的问题。因此，本研究的目的是使用重量法和电化学技术，以及在不同浓度下进行表面测试，来研究棕榈仁壳作为海水环境中热机械处理钢的缓蚀剂的用途。研究结果表明，棕榈仁壳通过吸附在钢表面抑制了阴极和阳极过程，这遵循朗缪尔吸附等温线。该缓蚀剂在500 ppm浓度下表现出98%的缓蚀效率。扫描电子显微镜分析证实了缓蚀剂在海水溶液中钢表面的薄膜。傅里叶变换红外光谱结果表明，提取物的成分通过吸附机制防止钢腐蚀。根据缓蚀剂的经济评估，使用棕榈仁壳提取物比使用传统缓蚀剂成本更低。
