Protection of passive film breakdown and corrosion of iron in 0.5 M NaCl by coverage with an ultrathin two-dimensional polymer coating and healing treatment of passive film

Tadashi Shimura, Kunitsugu Aramaki

研究成果: Article査読

抄録

The time required for passive film breakdown, tbd and the protective efficiency, P of an ultrathin two-dimensional polymer protective coating prepared by chemical modification of a carboxylate ion self-assembled monolayer adsorbed on a passivated Fe were measured in aerated 0.5 M NaCl. The value of tbd was short, 1.7 h. The tbd value of the passivated Fe electrode covered with the polymer coating and further, healed in 0.1 M NaNO3 was 4.1 h. The P values of these coatings were extremely high, around 99.9% before tbd, indicating perfect protection of Fe against corrosion in both solutions, unless the passive film was broken down. The P values of protective coatings prepared by chemical modification of three self-assembled monolayers adsorbed on metals and oxidized metals were compared with one another in short and long ranges of the immersion time in oxygenated 0.5 M neutral solutions.

本文言語English
ページ(範囲)152-155
ページ数4
ジャーナルZairyo to Kankyo/ Corrosion Engineering
66
4
DOI
出版ステータスPublished - 2017
外部発表はい

ASJC Scopus subject areas

  • 表面、皮膜および薄膜
  • 金属および合金
  • 電気化学
  • 材料化学

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