Electrochemical and XPS studies of the effects of alloying elements on the corrosion behaviour of amorphous Fe-Cr-metalloid alloys of 9m H2SO4

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

Electrochemical and XPS studies of the effects of alloying elements on the corrosion behaviour of amorphous Fe-Cr-metalloid alloys of 9m H₂SO₄

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

Materials Design Division

Research output: Contribution to journal › Article › peer-review

Abstract

The corrosion behaviour of amorphous Fe-Cr-13P-7C, Fe-Cr-13P-7B and Fe-Cr-20B alloys in 9M H₂SO₄ solution at 30°C was investigated. An increase in the alloy chromium content improved the corrosion resistance of the amorphous Fe-Cr-13P-7C and Fe-Cr-13P-7B 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 phosphorous accelerates the cathodic reaction of hydrogen evolution on the amorphous Fe-Cr alloys.This leads to sharp ennoblement in the corrosion potential of amorphous Fe-8Cr-13P-7M (M = C,B) alloys from the active state to the passive state with immersion time, while the corrosion potential of Fe-8Cr-20B alloy is unchanged. Chromium is concentrated in the passive film on the amorphous Fe-8Cr-7M (M = C,B) alloys formed by immersion in 9M H₂SO₄ solution, and is further concentrated by prolonged immersion. In particular, the concentration of chromic ions in the passive film on the Fe-8Cr-13P-7C alloy is higher than in the film on the Fe-8Cr-13P-7B alloy.

Original language	English
Pages (from-to)	829-1839
Number of pages	1011
Journal	Corrosion Science
Volume	34
Issue number	11
Publication status	Published - 1993 Nov 1

ASJC Scopus subject areas

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

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Electrochemical and XPS studies of the effects of alloying elements on the corrosion behaviour of amorphous Fe-Cr-metalloid alloys of 9m H₂SO₄. / Im, Byung Mo; Akiyama, Eiji; Habazaki, Hiroki; Kawashima, Asahi; Asami, Katsuhiko; Hashimoto, Koji.

In: Corrosion Science, Vol. 34, No. 11, 01.11.1993, p. 829-1839.

Research output: Contribution to journal › Article › peer-review

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abstract = "The corrosion behaviour of amorphous Fe-Cr-13P-7C, Fe-Cr-13P-7B and Fe-Cr-20B alloys in 9M H2SO4 solution at 30°C was investigated. An increase in the alloy chromium content improved the corrosion resistance of the amorphous Fe-Cr-13P-7C and Fe-Cr-13P-7B 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 phosphorous accelerates the cathodic reaction of hydrogen evolution on the amorphous Fe-Cr alloys.This leads to sharp ennoblement in the corrosion potential of amorphous Fe-8Cr-13P-7M (M = C,B) alloys from the active state to the passive state with immersion time, while the corrosion potential of Fe-8Cr-20B alloy is unchanged. Chromium is concentrated in the passive film on the amorphous Fe-8Cr-7M (M = C,B) alloys formed by immersion in 9M H2SO4 solution, and is further concentrated by prolonged immersion. In particular, the concentration of chromic ions in the passive film on the Fe-8Cr-13P-7C alloy is higher than in the film on the Fe-8Cr-13P-7B alloy.",

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N2 - The corrosion behaviour of amorphous Fe-Cr-13P-7C, Fe-Cr-13P-7B and Fe-Cr-20B alloys in 9M H2SO4 solution at 30°C was investigated. An increase in the alloy chromium content improved the corrosion resistance of the amorphous Fe-Cr-13P-7C and Fe-Cr-13P-7B 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 phosphorous accelerates the cathodic reaction of hydrogen evolution on the amorphous Fe-Cr alloys.This leads to sharp ennoblement in the corrosion potential of amorphous Fe-8Cr-13P-7M (M = C,B) alloys from the active state to the passive state with immersion time, while the corrosion potential of Fe-8Cr-20B alloy is unchanged. Chromium is concentrated in the passive film on the amorphous Fe-8Cr-7M (M = C,B) alloys formed by immersion in 9M H2SO4 solution, and is further concentrated by prolonged immersion. In particular, the concentration of chromic ions in the passive film on the Fe-8Cr-13P-7C alloy is higher than in the film on the Fe-8Cr-13P-7B alloy.

AB - The corrosion behaviour of amorphous Fe-Cr-13P-7C, Fe-Cr-13P-7B and Fe-Cr-20B alloys in 9M H2SO4 solution at 30°C was investigated. An increase in the alloy chromium content improved the corrosion resistance of the amorphous Fe-Cr-13P-7C and Fe-Cr-13P-7B 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 phosphorous accelerates the cathodic reaction of hydrogen evolution on the amorphous Fe-Cr alloys.This leads to sharp ennoblement in the corrosion potential of amorphous Fe-8Cr-13P-7M (M = C,B) alloys from the active state to the passive state with immersion time, while the corrosion potential of Fe-8Cr-20B alloy is unchanged. Chromium is concentrated in the passive film on the amorphous Fe-8Cr-7M (M = C,B) alloys formed by immersion in 9M H2SO4 solution, and is further concentrated by prolonged immersion. In particular, the concentration of chromic ions in the passive film on the Fe-8Cr-13P-7C alloy is higher than in the film on the Fe-8Cr-13P-7B alloy.

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Electrochemical and XPS studies of the effects of alloying elements on the corrosion behaviour of amorphous Fe-Cr-metalloid alloys of 9m H₂SO₄

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