Abouzeid F M A, Alshammery Sultanah
Chemistry Department, Faculty of Science, Alexandria University, Alexandria, Egypt.
Department of Basic Engineering Science, College of Engineering, Imam Abdulrahman bin Faisal university, Dammam, Saudi Arabia.
Sci Rep. 2024 Oct 15;14(1):24170. doi: 10.1038/s41598-024-73592-5.
Different flavone extracts from apple peel and aldehydes from grape stems were investigated as restraints of the anodic aluminum dissolution procedure in 60% HPO:40% HSO. The potential-limiting current correlation for Al anode was assessed and associated with regularly improving apple peel and grape stems extract concentration (100 to 1000 ppm range). The limiting current reduces whereas retardation effectiveness (%) increases as the concentrations of apple peel and grape stems extract rise. Apple peel/grape stems mixture extract is pondered to have the most retardation impact. Apple peel and grape stems extract retardation mechanism depends on the adsorption manner at the aluminum metal, which was confirmed via scanning electron microscopy (SEM) and UV-VIS-NIR spectra which reflect that elevated extract concentration (1000 ppm) have a hopeful and positive impact on the Al surface quality. The activation energy and activation constraints (changes in enthalpy, entropy, and Gibbs free energy) were established, and suggestions for powerful interaction between the additives and the aluminum surface were conveyed. The extract items were inspected via Fourier transform infrared spectroscopy and Gc-mass. The apple peel and grape stems extract establish perspective as a natural electro-polishing green restraint. The weight loss data obtained is in excellent conformity with the result obtained by electrochemical measurements. The synergistic influence between apple peel/grape stems (S = 1.64-1.83 ) is noticeable. The lowest Ra and PV estimates are recorded via an apple peel /grape stems mixture, which achieves the greatest reflectance estimate and retardation effectiveness. This is recognized high active site number for apple peel /grape stems mixture extract.
研究了苹果皮中的不同黄酮提取物和葡萄茎中的醛类物质对60% HPO:40% HSO中阳极铝溶解过程的抑制作用。评估了铝阳极的电位限制电流相关性，并将其与苹果皮和葡萄茎提取物浓度（100至1000 ppm范围）的定期提高相关联。随着苹果皮和葡萄茎提取物浓度的增加，极限电流降低，而缓蚀效率（%）增加。苹果皮/葡萄茎混合提取物被认为具有最大的缓蚀作用。苹果皮和葡萄茎提取物的缓蚀机制取决于在铝金属上的吸附方式，这通过扫描电子显微镜（SEM）和紫外-可见-近红外光谱得到证实，这些光谱表明提高提取物浓度（1000 ppm）对铝表面质量有积极的正面影响。确定了活化能和活化限制（焓、熵和吉布斯自由能的变化），并传达了添加剂与铝表面之间强相互作用的建议。通过傅里叶变换红外光谱和气相色谱-质谱对提取物进行了检测。苹果皮和葡萄茎提取物有望成为一种天然的电抛光绿色抑制剂。获得的失重数据与电化学测量结果非常吻合。苹果皮/葡萄茎之间的协同影响（S = 1.64 - 1.83）很明显。通过苹果皮/葡萄茎混合物记录到最低的Ra和PV估计值，其实现了最大的反射率估计值和缓蚀效率。这被认为是苹果皮/葡萄茎混合提取物的高活性位点数量。
