Effect of preferential dissolution on erosion-corrosion for chromium steel in alkali slurry

M.M. Stack, K. Chi

Research output: Contribution to journalArticle

Abstract

An investigation was carried out concerning the effect of preferential dissolution on the erosion-corrosion for a chromium steel in 1mol/L NaOH. Preliminary tests using a potentiodynamic technique were performed in order to establish the presence of preferential dissolution in the alkali solution with and without the alumina particles at different rotation speeds. For purposes of quantifying the observed phenomena a potentiostatic mass loss method was also used. The results show that the active peaks occur at potential between +0.4 and +0.5V on the polarization curves, which indicates that there is a preferential dissolution for chromium steel under erosion-corrosion conditions and the ferrite phase acts as a sacrificial anode in favor of (Fe,Cr)7C3 phase. Addition of particles can promote the preferential dissolution at different rotation speeds. The combined effects of erosion-corrosion results in total mass loss rates to be greater than the sum effects of each process taken alone, thus showing a strong synergism between erosion and corrosion due to preferential dissolution.
LanguageEnglish
Pages931-935
Number of pages4
JournalTransactions of the Non-Ferrous Metal Society of China
Volume12
Issue number5
Publication statusPublished - 2002

Fingerprint

chromium steels
Steel
Alkalies
Chromium
slurry
erosion
chromium
corrosion
Erosion
alkalies
dissolving
Dissolution
steel
dissolution
Corrosion
ferrite
synergism
Aluminum Oxide
aluminum oxide
Ferrite

Keywords

  • erosion
  • corrosion
  • tribology
  • steel
  • materials science
  • oxidation

Cite this

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title = "Effect of preferential dissolution on erosion-corrosion for chromium steel in alkali slurry",
abstract = "An investigation was carried out concerning the effect of preferential dissolution on the erosion-corrosion for a chromium steel in 1mol/L NaOH. Preliminary tests using a potentiodynamic technique were performed in order to establish the presence of preferential dissolution in the alkali solution with and without the alumina particles at different rotation speeds. For purposes of quantifying the observed phenomena a potentiostatic mass loss method was also used. The results show that the active peaks occur at potential between +0.4 and +0.5V on the polarization curves, which indicates that there is a preferential dissolution for chromium steel under erosion-corrosion conditions and the ferrite phase acts as a sacrificial anode in favor of (Fe,Cr)7C3 phase. Addition of particles can promote the preferential dissolution at different rotation speeds. The combined effects of erosion-corrosion results in total mass loss rates to be greater than the sum effects of each process taken alone, thus showing a strong synergism between erosion and corrosion due to preferential dissolution.",
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AU - Stack, M.M.

AU - Chi, K.

PY - 2002

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N2 - An investigation was carried out concerning the effect of preferential dissolution on the erosion-corrosion for a chromium steel in 1mol/L NaOH. Preliminary tests using a potentiodynamic technique were performed in order to establish the presence of preferential dissolution in the alkali solution with and without the alumina particles at different rotation speeds. For purposes of quantifying the observed phenomena a potentiostatic mass loss method was also used. The results show that the active peaks occur at potential between +0.4 and +0.5V on the polarization curves, which indicates that there is a preferential dissolution for chromium steel under erosion-corrosion conditions and the ferrite phase acts as a sacrificial anode in favor of (Fe,Cr)7C3 phase. Addition of particles can promote the preferential dissolution at different rotation speeds. The combined effects of erosion-corrosion results in total mass loss rates to be greater than the sum effects of each process taken alone, thus showing a strong synergism between erosion and corrosion due to preferential dissolution.

AB - An investigation was carried out concerning the effect of preferential dissolution on the erosion-corrosion for a chromium steel in 1mol/L NaOH. Preliminary tests using a potentiodynamic technique were performed in order to establish the presence of preferential dissolution in the alkali solution with and without the alumina particles at different rotation speeds. For purposes of quantifying the observed phenomena a potentiostatic mass loss method was also used. The results show that the active peaks occur at potential between +0.4 and +0.5V on the polarization curves, which indicates that there is a preferential dissolution for chromium steel under erosion-corrosion conditions and the ferrite phase acts as a sacrificial anode in favor of (Fe,Cr)7C3 phase. Addition of particles can promote the preferential dissolution at different rotation speeds. The combined effects of erosion-corrosion results in total mass loss rates to be greater than the sum effects of each process taken alone, thus showing a strong synergism between erosion and corrosion due to preferential dissolution.

KW - erosion

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KW - tribology

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KW - materials science

KW - oxidation

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