Effect of aging in air and immersion into phosphate solution on protectiveness and transformations of vinyltriethoxy silane nanofilms on iron

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• 作者：M. Kanoza ; I. Flis-Kabulska ; J. Flis ; ^{jflis@ichf.edu.pl}
• 关键词：A. Organic coatings ; B. EIS ; B. XPS ; B. IR spectroscopy ; C. Neutral inhibition
• 刊名：Corrosion Science
• 出版年：2012
• 期刊代码：28_0010938x
• 类别：ch
• 出版时间：August, 2012
• 卷：61
• 期：Complete
• 页码：224-230
• 文件大小：966 K

摘要

Vinyltriethoxy silane (VTES) films on iron (Fe/VTES) were investigated with EIS, XPS and FTIR after aging in air and immersion into 0.01 M Na₂HPO₄ solution. With the increasing exposure duration, charge transfer resistance of Fe/VTES increased indicating improvement of corrosion resistance. XPS analysis revealed for thin films the growth of iron oxides in air and of phosphates in the solution. Transformations in VTES films involved the formation of polysiloxanes, SiO₂ related species, and ethanol. FTIR examinations showed the disappearance of vinyl groups in VTES after exposure to air, and appearance of -CO groups after immersion into phosphate solution.