Effect of sulfate and carbonate ions on reinforcing steel corrosion as evaluated using AC impedance spectroscopy

Samuel K. Somuah; John K. Boah; Patrick Leblanc; Abdul Hamid J. Al-Tayyib; Abdulaziz Al-Mana

Effect of sulfate and carbonate ions on reinforcing steel corrosion as evaluated using AC impedance spectroscopy

Samuel K. Somuah^*, John K. Boah, Patrick Leblanc, Abdul Hamid J. Al-Tayyib, Abdulaziz Al-Mana

^*Corresponding author for this work

King Fahd University of Petroleum & Minerals

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

16 Scopus citations

Abstract

The electrochemical behavior of carbon steel in saturated calcium hydroxide solutions has been studied using AC impedance spectroscopy and linear polarization resistance techniques. Sulfate and carbonate ions help to break down the protective passive films, resulting in an increased rate of corrosion. The behavior of the sulfate is different from that of CO₂ since the sulfate forms a less protective film than the original iron oxide film. the CO₂, however, has two effects. It modifies the Ca(OH)₂ solution with the formation of CaCO₃ and also modifies the original passive film, leading to increased corrosion rates. With an increase in temperature from 22 to 50 C, the corrosion rate may be increased by as much as a factor of about 20. Two-time constants initially characterize the electrochemical reactions caused by both sulfate and carbonate ions, but these reactions are eventually controlled by charge transfer.

Original language	English
Pages (from-to)	49-55
Number of pages	7
Journal	ACI Materials Journal
Volume	88
Issue number	1
State	Published - Jan 1991

ASJC Scopus subject areas

Civil and Structural Engineering
Building and Construction
General Materials Science

Cite this

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title = "Effect of sulfate and carbonate ions on reinforcing steel corrosion as evaluated using AC impedance spectroscopy",

abstract = "The electrochemical behavior of carbon steel in saturated calcium hydroxide solutions has been studied using AC impedance spectroscopy and linear polarization resistance techniques. Sulfate and carbonate ions help to break down the protective passive films, resulting in an increased rate of corrosion. The behavior of the sulfate is different from that of CO2 since the sulfate forms a less protective film than the original iron oxide film. the CO2, however, has two effects. It modifies the Ca(OH)2 solution with the formation of CaCO3 and also modifies the original passive film, leading to increased corrosion rates. With an increase in temperature from 22 to 50 C, the corrosion rate may be increased by as much as a factor of about 20. Two-time constants initially characterize the electrochemical reactions caused by both sulfate and carbonate ions, but these reactions are eventually controlled by charge transfer.",

author = "Somuah, \{Samuel K.\} and Boah, \{John K.\} and Patrick Leblanc and Al-Tayyib, \{Abdul Hamid J.\} and Abdulaziz Al-Mana",

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T1 - Effect of sulfate and carbonate ions on reinforcing steel corrosion as evaluated using AC impedance spectroscopy

AU - Somuah, Samuel K.

AU - Boah, John K.

AU - Leblanc, Patrick

AU - Al-Tayyib, Abdul Hamid J.

AU - Al-Mana, Abdulaziz

PY - 1991/1

Y1 - 1991/1

N2 - The electrochemical behavior of carbon steel in saturated calcium hydroxide solutions has been studied using AC impedance spectroscopy and linear polarization resistance techniques. Sulfate and carbonate ions help to break down the protective passive films, resulting in an increased rate of corrosion. The behavior of the sulfate is different from that of CO2 since the sulfate forms a less protective film than the original iron oxide film. the CO2, however, has two effects. It modifies the Ca(OH)2 solution with the formation of CaCO3 and also modifies the original passive film, leading to increased corrosion rates. With an increase in temperature from 22 to 50 C, the corrosion rate may be increased by as much as a factor of about 20. Two-time constants initially characterize the electrochemical reactions caused by both sulfate and carbonate ions, but these reactions are eventually controlled by charge transfer.

AB - The electrochemical behavior of carbon steel in saturated calcium hydroxide solutions has been studied using AC impedance spectroscopy and linear polarization resistance techniques. Sulfate and carbonate ions help to break down the protective passive films, resulting in an increased rate of corrosion. The behavior of the sulfate is different from that of CO2 since the sulfate forms a less protective film than the original iron oxide film. the CO2, however, has two effects. It modifies the Ca(OH)2 solution with the formation of CaCO3 and also modifies the original passive film, leading to increased corrosion rates. With an increase in temperature from 22 to 50 C, the corrosion rate may be increased by as much as a factor of about 20. Two-time constants initially characterize the electrochemical reactions caused by both sulfate and carbonate ions, but these reactions are eventually controlled by charge transfer.

UR - https://www.scopus.com/pages/publications/0025852804

M3 - Article

AN - SCOPUS:0025852804

SN - 0889-325X

VL - 88

SP - 49

EP - 55

JO - ACI Materials Journal

JF - ACI Materials Journal

IS - 1

ER -

Effect of sulfate and carbonate ions on reinforcing steel corrosion as evaluated using AC impedance spectroscopy

Abstract

ASJC Scopus subject areas

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