Protection of iron against corrosion by coverage with ultrathin two-dimensional polymer films of a hydroxymethylbenzene self-assembled monolayer anchored by the formation of a covalent bond

Tadashi Shimura, Kunitsugu Aramaki

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16 Citations (Scopus)

Abstract

Ultrathin films of two-dimensional polymers were prepared on an iron electrode by modification of a p-hydroxymethylbenzene p-HOCH2C6H4 (HOMB) self-assembled monolayer (SAM) with 1,2-bis(triethoxysilyl)ethane (C2H5O)3Si(CH2)2Si(OC2H5)3 (BTESE) and alkyltriethoxysilanes CnH2n+1Si(OC2H5)3 (CnTES, n = 8 and 18). The electrode was derivatized by cathodic reduction of p-hydroxymethylbenzenediazonium tetrafluoroborate HOCH2C6H4N2BF4 in an electrolytic acetonitrile solution below 10 °C for 1 h to form the SAM via a covalent bond between carbon and iron atoms. The protective ability of the polymer film against iron corrosion was determined by polarization measurement of the coated electrode in an oxygenated 0.5 M NaCl solution. The protective efficiencies of the polymer films prepared by modification with BTESE plus C8TES and C18TES were 63.9% and 68.5% after immersion in 0.5 M NaCl for 1.5 h, respectively. These values were higher than those of the one-dimensional polymer films prepared with the respective CnTES. The film of the HOMB SAM modified with BTESE plus C8TES was characterized by contact angle measurement using a drop of water and X-ray photoelectron and FTIR reflection spectroscopies. The films of the HOMB SAM modified with BTESE plus C8TES and C18TES were persistent during immersion of the coated electrodes in 0.5 M NaCl for many hours by far as compared with the alkanethiol SAM anchored on iron by the formation of a coordinate bond.

Original languageEnglish
Pages (from-to)292-300
Number of pages9
JournalCorrosion Science
Volume50
Issue number1
DOIs
Publication statusPublished - 2008 Jan

Fingerprint

Covalent bonds
Self assembled monolayers
Polymer films
Iron
Corrosion
Electrodes
Ultrathin films
Angle measurement
Ethane
Photoelectrons
Acetonitrile
Contact angle
Polymers
Carbon
Spectroscopy
Polarization
X rays
Atoms
Water

Keywords

  • A. Iron
  • B. Polarization
  • C. Covalent adsorption
  • C. Self-assembled monolayer
  • C. Two-dimensional polymer coatings

ASJC Scopus subject areas

  • Materials Science(all)
  • Metals and Alloys

Cite this

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title = "Protection of iron against corrosion by coverage with ultrathin two-dimensional polymer films of a hydroxymethylbenzene self-assembled monolayer anchored by the formation of a covalent bond",
abstract = "Ultrathin films of two-dimensional polymers were prepared on an iron electrode by modification of a p-hydroxymethylbenzene p-HOCH2C6H4 (HOMB) self-assembled monolayer (SAM) with 1,2-bis(triethoxysilyl)ethane (C2H5O)3Si(CH2)2Si(OC2H5)3 (BTESE) and alkyltriethoxysilanes CnH2n+1Si(OC2H5)3 (CnTES, n = 8 and 18). The electrode was derivatized by cathodic reduction of p-hydroxymethylbenzenediazonium tetrafluoroborate HOCH2C6H4N2BF4 in an electrolytic acetonitrile solution below 10 °C for 1 h to form the SAM via a covalent bond between carbon and iron atoms. The protective ability of the polymer film against iron corrosion was determined by polarization measurement of the coated electrode in an oxygenated 0.5 M NaCl solution. The protective efficiencies of the polymer films prepared by modification with BTESE plus C8TES and C18TES were 63.9{\%} and 68.5{\%} after immersion in 0.5 M NaCl for 1.5 h, respectively. These values were higher than those of the one-dimensional polymer films prepared with the respective CnTES. The film of the HOMB SAM modified with BTESE plus C8TES was characterized by contact angle measurement using a drop of water and X-ray photoelectron and FTIR reflection spectroscopies. The films of the HOMB SAM modified with BTESE plus C8TES and C18TES were persistent during immersion of the coated electrodes in 0.5 M NaCl for many hours by far as compared with the alkanethiol SAM anchored on iron by the formation of a coordinate bond.",
keywords = "A. Iron, B. Polarization, C. Covalent adsorption, C. Self-assembled monolayer, C. Two-dimensional polymer coatings",
author = "Tadashi Shimura and Kunitsugu Aramaki",
year = "2008",
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T1 - Protection of iron against corrosion by coverage with ultrathin two-dimensional polymer films of a hydroxymethylbenzene self-assembled monolayer anchored by the formation of a covalent bond

AU - Shimura, Tadashi

AU - Aramaki, Kunitsugu

PY - 2008/1

Y1 - 2008/1

N2 - Ultrathin films of two-dimensional polymers were prepared on an iron electrode by modification of a p-hydroxymethylbenzene p-HOCH2C6H4 (HOMB) self-assembled monolayer (SAM) with 1,2-bis(triethoxysilyl)ethane (C2H5O)3Si(CH2)2Si(OC2H5)3 (BTESE) and alkyltriethoxysilanes CnH2n+1Si(OC2H5)3 (CnTES, n = 8 and 18). The electrode was derivatized by cathodic reduction of p-hydroxymethylbenzenediazonium tetrafluoroborate HOCH2C6H4N2BF4 in an electrolytic acetonitrile solution below 10 °C for 1 h to form the SAM via a covalent bond between carbon and iron atoms. The protective ability of the polymer film against iron corrosion was determined by polarization measurement of the coated electrode in an oxygenated 0.5 M NaCl solution. The protective efficiencies of the polymer films prepared by modification with BTESE plus C8TES and C18TES were 63.9% and 68.5% after immersion in 0.5 M NaCl for 1.5 h, respectively. These values were higher than those of the one-dimensional polymer films prepared with the respective CnTES. The film of the HOMB SAM modified with BTESE plus C8TES was characterized by contact angle measurement using a drop of water and X-ray photoelectron and FTIR reflection spectroscopies. The films of the HOMB SAM modified with BTESE plus C8TES and C18TES were persistent during immersion of the coated electrodes in 0.5 M NaCl for many hours by far as compared with the alkanethiol SAM anchored on iron by the formation of a coordinate bond.

AB - Ultrathin films of two-dimensional polymers were prepared on an iron electrode by modification of a p-hydroxymethylbenzene p-HOCH2C6H4 (HOMB) self-assembled monolayer (SAM) with 1,2-bis(triethoxysilyl)ethane (C2H5O)3Si(CH2)2Si(OC2H5)3 (BTESE) and alkyltriethoxysilanes CnH2n+1Si(OC2H5)3 (CnTES, n = 8 and 18). The electrode was derivatized by cathodic reduction of p-hydroxymethylbenzenediazonium tetrafluoroborate HOCH2C6H4N2BF4 in an electrolytic acetonitrile solution below 10 °C for 1 h to form the SAM via a covalent bond between carbon and iron atoms. The protective ability of the polymer film against iron corrosion was determined by polarization measurement of the coated electrode in an oxygenated 0.5 M NaCl solution. The protective efficiencies of the polymer films prepared by modification with BTESE plus C8TES and C18TES were 63.9% and 68.5% after immersion in 0.5 M NaCl for 1.5 h, respectively. These values were higher than those of the one-dimensional polymer films prepared with the respective CnTES. The film of the HOMB SAM modified with BTESE plus C8TES was characterized by contact angle measurement using a drop of water and X-ray photoelectron and FTIR reflection spectroscopies. The films of the HOMB SAM modified with BTESE plus C8TES and C18TES were persistent during immersion of the coated electrodes in 0.5 M NaCl for many hours by far as compared with the alkanethiol SAM anchored on iron by the formation of a coordinate bond.

KW - A. Iron

KW - B. Polarization

KW - C. Covalent adsorption

KW - C. Self-assembled monolayer

KW - C. Two-dimensional polymer coatings

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U2 - 10.1016/j.corsci.2007.05.032

DO - 10.1016/j.corsci.2007.05.032

M3 - Article

VL - 50

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EP - 300

JO - Corrosion Science

JF - Corrosion Science

SN - 0010-938X

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