Ramírez-Arteaga América María, Hernández-Valencia Martha Patricia, Guardián-Tapia Rene, Gálvez-Larios Ana Karen, González-Rodríguez José Gonzalo, López-Sesenes Roy
FCQeI, Universidad Autónoma del Estado de Morelos, Av. Universidad 1001, Chamilpa, 62210, Cuernavaca, Morelos, Mexico.
CIICAp-IICBA, Universidad Autónoma del Estado de Morelos, Av. Universidad 1001, Chamilpa, 62210, Cuernavaca, Mexico.
Sci Rep. 2025 Aug 21;15(1):30756. doi: 10.1038/s41598-025-15027-3.
The possibility of using Vanillin as an eco-friendly corrosion inhibitor for Al in 0.5 M HSO has been evaluated, examining concentrations ranging from 0 to 10 mM at 25, 40, and 60 °C. Results indicate that Vanillin is a mixed corrosion inhibitor. Its inhibitory effect can be attributed to aldehyde functional groups forming a protective layer by reacting with Al ions, which are chemisorbed onto the metal's surface, as was demonstrated via SEM analysis of the metal surface. The I and R values estimated from the electrochemical characterization tend to improve in the presence of Vanillin. However, inhibition efficiency is affected by temperature, resulting in lower values. Also, the weight loss analyses demonstrated that Vanillin is desorbed over time and temperature. The SEM micrographs taken after weight loss show an aluminum surface with several pits in the absence of inhibitor. Otherwise, EDS analyses show the presence of carbon, confirming the Vanillin adsorption on the metal surface.
评估了香草醛作为铝在0.5 M硫酸中一种环保型缓蚀剂的可能性，研究了在25、40和60°C下浓度范围为0至10 mM的情况。结果表明香草醛是一种混合型缓蚀剂。其缓蚀作用可归因于醛官能团与铝离子反应形成保护层，铝离子化学吸附在金属表面，这通过对金属表面的扫描电子显微镜分析得到证实。从电化学表征估计的I和R值在香草醛存在下趋于改善。然而，缓蚀效率受温度影响，导致值较低。此外，失重分析表明香草醛会随时间和温度解吸。失重后拍摄的扫描电子显微镜照片显示，在没有缓蚀剂的情况下，铝表面有几个凹坑。否则，能谱分析表明存在碳，证实了香草醛吸附在金属表面。
