Elhady Sherifa, Inan Hatice, Shaaban Mahmoud, Fahim Irene S
Smart Engineering Systems Centre, Nile University, Cairo, Egypt.
Mechanical Engineering Program, School of Engineering and Applied Sciences, Nile University, Cairo, Egypt.
Sci Rep. 2023 Oct 10;13(1):17151. doi: 10.1038/s41598-023-43701-x.
Corrosion constitutes a significant issue in industries that handle metals. Corrosion inhibitors with a low impact on the environment provide a significant economic benefit in various engineering applications. In this work, the effectiveness of olive leaves extract is evaluated as a cost-effective and environmentally-friendly corrosion inhibitor. The corrosion of carbon steel in different concentrations of hydrochloric acid (0.1, 1.0, and 2.0 M) when protected by an aqueous solution of olive leaf extract of concentrations ranging from 10 to 60 ppm is investigated. A green extraction process based upon water extraction is used to ensure minimum impact on the environment. Results show that the corrosion inhibition efficiency increased as the concentration of the olive leaf extract increased. An analysis of variance showed a significant effect of acidic molarity, temperature, and inhibitor concentration on the corrosion rate. A significant statistical model indicates that the inhibitor exhibits higher efficiencies at higher acidic molarity. Results of SEM and EDX also demonstrated that a protective film of the inhibitor on the specimen surface plays a role in corrosion inhibition, suggesting that the inhibitor molecules are adsorbed at the interface between the carbon steel and the acid solution. The study provides an insight on the corrosion mechanism and highlights the potential of olive oil extract as an eco-friendly alternative to traditional corrosion inhibitors.
腐蚀是金属加工行业中的一个重大问题。对环境影响较小的缓蚀剂在各种工程应用中具有显著的经济效益。在这项工作中，评估了橄榄叶提取物作为一种经济高效且环保的缓蚀剂的有效性。研究了在不同浓度（0.1、1.0和2.0 M）盐酸中，当用浓度范围为10至60 ppm的橄榄叶提取物水溶液保护时碳钢的腐蚀情况。采用基于水提取的绿色提取工艺以确保对环境的影响最小。结果表明，随着橄榄叶提取物浓度的增加，缓蚀效率提高。方差分析表明酸性摩尔浓度、温度和缓蚀剂浓度对腐蚀速率有显著影响。一个显著的统计模型表明，在较高的酸性摩尔浓度下，缓蚀剂表现出更高的效率。扫描电子显微镜（SEM）和能谱分析（EDX）结果还表明，缓蚀剂在试样表面形成的保护膜在缓蚀过程中起作用，这表明缓蚀剂分子吸附在碳钢与酸溶液的界面处。该研究深入了解了腐蚀机理，并突出了橄榄油提取物作为传统缓蚀剂的环保替代品的潜力。
