期刊
MATERIALS
卷 14, 期 17, 页码 -出版社
MDPI
DOI: 10.3390/ma14175016
关键词
steel; corrosion inhibition; tea tree extract; raman spectroscopy
类别
资金
- SeoulTech (Seoul National University of Science and Technology, Republic of Korea)
Tea tree extract, with antioxidant constituents such as alpha-terpineol, terpinen-4-ol, and alpha-terpinene, shows significant inhibition efficiency against uniform and pitting corrosion on mild steel and stainless steel. The most effective constituent contributing to the inhibitory performance is alpha-terpineol. The mechanism of anticorrosion involves the formation of organic-Fe complexes on the corroded steel surface through electron donor and acceptor interactions.
Tea tree extract, containing antioxidant constituents alpha-terpineol, terpinen-4-ol, and alpha-terpinene, has a wide range of applications in the cosmetic, food, and pharmaceutical industries. In this study, tea tree extract showed an anticorrosive effect under 1 M HCl solution on mild steel (MS) and 304 stainless steel (STS). Uniform corrosion for MS and pitting corrosion for STS at 298 K were retarded, with inhibition efficiencies of 77% and 86%, respectively. The inhibition of uniform and pitting corrosion was confirmed by scanning electron microscopy and laser scanning confocal microscopy in terms of surface roughness and pitting morphologies. The most effective constituent contributing to the inhibitory performance of tea tree extract was revealed to be alpha-terpineol, with an inhibition efficiency of 83%. The adsorption of tea tree extract was confirmed by surface characterization analysis using Fourier transform infrared spectroscopy, Raman spectroscopy, and Electrochemical impedance spectroscopy. Interestingly, G- and D-peaks of Raman spectra were detected from the inhibited steels, and this finding is the first example in the corrosion inhibition field. The anticorrosion mechanism can be explained by the formation of organic-Fe complexes on the corroded steel surface via electron donor and acceptor interactions in the presence of an oxygen atom of the hydroxyl group or ether of organic inhibitors.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据