Prevention of passive film breakdown on iron in a borate buffer solution containing chloride ion by coverage with a self-assembled monolayer of hexadecanoate ion

Kunitsugu Aramaki, Tadashi Shimura

研究成果: Article査読

39 被引用数 (Scopus)

抄録

Breakdown of a passive film on iron in a borate buffer solution (pH 8.49) containing 0.1 M of Cl- was suppressed by coverage of the passive film surface with a self-assembled monolayer (SAM) of hexadecanoate ion C15H31CO2- (C16A-). The pitting potential of an iron electrode previously passivated in the borate buffer at 0.50 V/SCE increased by treatment in an aqueous solution of sodium hexadecanoate for many hours, indicating protection of the passive film from breakdown caused by an attack on defects of the film with Cl-. No breakdown occurred over the potential range of the passive region by coverage with the SAM of C16A- in some cases. Structures of the passive film and the monolayer were characterized by X-ray photoelectron and Fourier transform infrared reflection spectroscopies and contact angle measurement with a drop of water.

本文言語English
ページ(範囲)2639-2655
ページ数17
ジャーナルCorrosion Science
45
11
DOI
出版ステータスPublished - 2003 11

ASJC Scopus subject areas

  • 化学 (全般)
  • 化学工学(全般)
  • 材料科学(全般)

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