Alkanethiol monolayers at reduced and oxidized zinc surfaces with corrosion protection: A sum frequency generation and electrochemistry investigation

Article Abstract:

The sum frequency generation (SFG) spectroscopy, cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) are used to show that octadecanethiol (ODT) forms ordered monolayers at either electrochemically reduced or oxidized Zn surfaces. ODT monolayers show corrosion protection to underlying zinc at the early immersion stage in base, salt and acid media, but the protection efficiency is reduced with immersion due to the presence of defects within the monolayers.

Science & research, Primary nonferrous metals, not elsewhere classified, Texas, Secondary nonferrous metals, Research, Zinc, Zinc (Metal), Mechanical properties

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Preparation of alkanethiol monolayers on mild steel surfaces studied with sum frequency generation and electrochemistry

Article Abstract:

An n-alkenethiol, octadecanethiol (ODT), monolayer was successfully prepared onto an oxide-free mild steel (MS) surface under cathodic polarization in a 0.1 M LiCl/CH(sub 3)OH solution containing 1mM ODT. Cyclic voltammetry CV) and electrochemical impedence (EIS) and sum frequency generation (SFG) spectroscopy were applied to study and characterize the adsorption of ODT at a MS surface.

Analysis, Electric properties, Spectra, Electrochemistry, Polarization (Electricity)

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Surface microscopic structure and electrochemical rectification of a branched alkanethiol self-assembled monolayer

Article Abstract:

A combination of scanning tunneling microscopy (STM) and electrochemistry in aqueous environments is used to study the lattice structure of short-chain branched alkanethiol self-assembled monolayers (SAMs). The analysis shows that electrochemical rectification originates in localized electronic effects and is a very important characteristic of short-chain branched alkanethiol SAMs.

Design and construction, Alkanes, Structure

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