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Studies on corrosion inhibition of copper by alkanethiol SAMs prepared in aqueous micellar solution

✍ Scribed by P. Wang; C. Liang; N. Huang

Publisher
John Wiley and Sons
Year
2009
Tongue
German
Weight
283 KB
Volume
61
Category
Article
ISSN
0947-5117

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✦ Synopsis

Abstract

The character of 1‐dodecanethiol (DT) self‐assembled monolayers (SAMs) formed on copper surface in aqueous micellar solution is investigated by means of contact angle measurement, electrochemical impedance spectroscopy (EIS), and polarization curves. The contact angle measurement shows that the SAMs formed in aqueous micellar solution are oriented and compact. According to the electrochemical measurements, it is found that both the concentration of DT and temperature can significantly affect the property of SAMs. The DT SAMs can prevent the corrosion of copper in chloride‐containing solution effectively because the inhibition efficiency can reach 99.59% at the DT concentration of 10^−2^ M. The adsorption of DT in aqueous micellar solution obeys to the Langmuir adsorption isotherm, and the value of the free energy of adsorption calculated indicates that the adsorption of DT molecule is a spontaneous process and a typical of chemical adsorption.

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