skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Inhibition effects of N,N-dimethylalkylamines and octanethiol on iron corrosion in anhydrous acetonitrile solution containing FeCl{sub 3}

Abstract

Polarization and impedance measurements were carried out on an iron electrode in an anhydrous acetonitrile solution of 0.1 M LiClO{sub 4} and 0.01 M FeCl{sub 3} containing organic corrosion inhibitors. The inhibitors investigated were N,N-dimethylalkylamines C{sub n}H{sub 2n+1}N(CH{sub 3}){sub 2} (C{sub n}DMA, n = 8, 12, 16, and 18) and octanethiol C{sub 8}H{sub 17}SH (C{sub 8}T). These compounds suppressed both cathodic and anodic processes of iron corrosion in the acetonitrile solution. The double-layer capacitances obtained from impedance data for the electrode inhibited with C{sub n}DMA were markedly lower in the potential region of the cathodic polarization curve than those for the uninhibited electrode. Ultraviolet and visible spectra of the FeCl{sub 3} acetonitrile solution containing C{sub n}DMA revealed the formation of a Fe{sup 3+} complex cation with C{sub n}DMA, and joint adsorption of the complex cation with Cl{sup {minus}} on the iron surface was substantiated by X-ray photoelectron spectroscopy of the surface treated with the solution. A surface thiolate of C{sub 8}T was formed by its chemisorption on the iron surface, resulting in a decrease in the double-layer capacitance and the cathodic and anodic current densities, respectively.

Authors:
;
Publication Date:
Research Org.:
Keio Univ., Yokohoma (JP)
OSTI Identifier:
20080571
Resource Type:
Journal Article
Journal Name:
Journal of the Electrochemical Society
Additional Journal Information:
Journal Volume: 147; Journal Issue: 5; Other Information: PBD: May 2000; Journal ID: ISSN 0013-4651
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; IRON; ELECTROCHEMICAL CORROSION; CORROSION INHIBITORS; AMINES; THIOLS; PERFORMANCE TESTING; IRON CHLORIDES; ACETONITRILE; CORROSIVE EFFECTS

Citation Formats

Aramaki, Kunitsugu, and Kikuchi, Takeshi. Inhibition effects of N,N-dimethylalkylamines and octanethiol on iron corrosion in anhydrous acetonitrile solution containing FeCl{sub 3}. United States: N. p., 2000. Web. doi:10.1149/1.1393426.
Aramaki, Kunitsugu, & Kikuchi, Takeshi. Inhibition effects of N,N-dimethylalkylamines and octanethiol on iron corrosion in anhydrous acetonitrile solution containing FeCl{sub 3}. United States. doi:10.1149/1.1393426.
Aramaki, Kunitsugu, and Kikuchi, Takeshi. Mon . "Inhibition effects of N,N-dimethylalkylamines and octanethiol on iron corrosion in anhydrous acetonitrile solution containing FeCl{sub 3}". United States. doi:10.1149/1.1393426.
@article{osti_20080571,
title = {Inhibition effects of N,N-dimethylalkylamines and octanethiol on iron corrosion in anhydrous acetonitrile solution containing FeCl{sub 3}},
author = {Aramaki, Kunitsugu and Kikuchi, Takeshi},
abstractNote = {Polarization and impedance measurements were carried out on an iron electrode in an anhydrous acetonitrile solution of 0.1 M LiClO{sub 4} and 0.01 M FeCl{sub 3} containing organic corrosion inhibitors. The inhibitors investigated were N,N-dimethylalkylamines C{sub n}H{sub 2n+1}N(CH{sub 3}){sub 2} (C{sub n}DMA, n = 8, 12, 16, and 18) and octanethiol C{sub 8}H{sub 17}SH (C{sub 8}T). These compounds suppressed both cathodic and anodic processes of iron corrosion in the acetonitrile solution. The double-layer capacitances obtained from impedance data for the electrode inhibited with C{sub n}DMA were markedly lower in the potential region of the cathodic polarization curve than those for the uninhibited electrode. Ultraviolet and visible spectra of the FeCl{sub 3} acetonitrile solution containing C{sub n}DMA revealed the formation of a Fe{sup 3+} complex cation with C{sub n}DMA, and joint adsorption of the complex cation with Cl{sup {minus}} on the iron surface was substantiated by X-ray photoelectron spectroscopy of the surface treated with the solution. A surface thiolate of C{sub 8}T was formed by its chemisorption on the iron surface, resulting in a decrease in the double-layer capacitance and the cathodic and anodic current densities, respectively.},
doi = {10.1149/1.1393426},
journal = {Journal of the Electrochemical Society},
issn = {0013-4651},
number = 5,
volume = 147,
place = {United States},
year = {2000},
month = {5}
}