کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
219544 463278 2011 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Durable Cu corrosion inhibition in acidic solution by SAMs of Benzenethiol
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Durable Cu corrosion inhibition in acidic solution by SAMs of Benzenethiol
چکیده انگلیسی

The adsorption of Benzenethiol and 1-Undecanethiol on polycrystalline copper and their ability to inhibit the Cu corrosion process for several days in strongly acidic solution were studied by XPS and EIS. Surprisingly, the SAM of aromatic thiols assured higher protection and higher stability than the SAM of long-chain alkylic thiols in spite of their lower thickness, thanks to a noticeable increase in the charge-transfer resistance observed by EIS after few hours of exposure to the electrolyte. XPS data revealed that the bond with the substrate is more stable in the case of Benzenethiol than with 1-Undecanethiol. This is probably due to the presence of strong ring interactions, which allows the SAM to assume a highly ordered structure. The higher stability of the aromatic SAMs appears to be more important than the layer thickness for substrate passivation.


► SAM of aromatic thiols are more stable with respect to SAM of alkylic thiols.
► Aromatic SAMs improves their protective properties when exposed to aqueous solutions.
► We disproves the belief that the protection is mainly related to the layer thickness.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Electroanalytical Chemistry - Volume 657, Issues 1–2, 1 July 2011, Pages 192–195
نویسندگان
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