Electrochemical and XPS studies of the effects of alloying elements on the corrosion behavior of amorphous FeCrMetalloid alloys in 9 M H2SO4

Byung Mo Im, Eiji Akiyama, Hiroki Habazaki, Asahi Kawashima, Katsuhiko Asami, Koji Hashimoto

研究成果: Article査読

12 被引用数 (Scopus)

抄録

The corrosion behavior of amorphous FeCr13P7C, FeCr13P7B and FeCr20B alloys in 9 M H2SO4 solution at 30°C was investigated. An increase in the alloy chromium content improved the corrosion resistance of the amorphous FeCr13P7C and FeCr13P7B alloys. When only B is contained as a metalloid, alloying with chromium up to 15 at% is ineffective in increasing the corrosion resistance. The addition of phosphorus accelerates the cathodic reaction of hydrogen evolution on the amorphous FeCr alloys. This leads to sharp ennoblement in the corrosion potential of amorphous Fe8Cr13P7M (M C,B) alloys from the active state to the passive state with immersion time, while the corrosion potential of Fe8Cr20B alloy is unchanged. Chromium is concentrated in the passive film on the amorphous Fe8Cr13P7M (M C,B) alloys formed by immersion in 9 M H2SO4 solution, and is further concentrated by prolonged immersion. In particular, the concentration of chromic ions in the passive film on the Fe8Cr13P7C alloy is higher than that in the film on the Fe8Cr13P7B alloy.

本文言語English
ページ(範囲)1829-1839
ページ数11
ジャーナルCorrosion Science
34
11
DOI
出版ステータスPublished - 1993 11

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Science(all)

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