Function of Cu-Sb or Al microalloying on the corrosion resistance of 9Cr steel exposed to simulated concrete pore solution

Zhaodong Li; Runnong Chen; Yanguang Cao; Bo Gao; Qilong Yong; Qifu Zhang; Xiaogang Li

doi:10.1016/j.corsci.2024.111983

Function of Cu-Sb or Al microalloying on the corrosion resistance of 9Cr steel exposed to simulated concrete pore solution

Zhaodong Li^*
, Runnong Chen^*
, Yanguang Cao
, Bo Gao
, Qilong Yong
, Qifu Zhang
, Xiaogang Li

^*Corresponding author for this work

China Iron and Steel Research Institute Group
University of Science and Technology Beijing

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

7 Scopus citations

Abstract

The role of Cu-Sb or Al on the passivation and Cl-induced depassivation of 9Cr steel in simulated concrete pore solution was systematically obtained via electrochemical tests and microstructure characterization. Both microalloying enhanced electrochemical passivation even if the solution pH dropped. Cu and Al participated in the formation of natural passive film, and the properties of passive film were optimized in terms of resistance, composition, and inner film thickness. However, the chloride threshold level (CTL) was not increased with Cu-Sb microalloying and even decreased with Al microalloying, which is understood from the stability of Al-containing products and the hazards of inclusions.

Original language	English
Article number	111983
Journal	Corrosion Science
Volume	231
DOIs	https://doi.org/10.1016/j.corsci.2024.111983
State	Published - 1 May 2024
Externally published	Yes

Keywords

9Cr steel rebar
Al adding
Chloride threshold level
Cu-Sb adding
Passive film

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10.1016/j.corsci.2024.111983

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title = "Function of Cu-Sb or Al microalloying on the corrosion resistance of 9Cr steel exposed to simulated concrete pore solution",

abstract = "The role of Cu-Sb or Al on the passivation and Cl-induced depassivation of 9Cr steel in simulated concrete pore solution was systematically obtained via electrochemical tests and microstructure characterization. Both microalloying enhanced electrochemical passivation even if the solution pH dropped. Cu and Al participated in the formation of natural passive film, and the properties of passive film were optimized in terms of resistance, composition, and inner film thickness. However, the chloride threshold level (CTL) was not increased with Cu-Sb microalloying and even decreased with Al microalloying, which is understood from the stability of Al-containing products and the hazards of inclusions.",

keywords = "9Cr steel rebar, Al adding, Chloride threshold level, Cu-Sb adding, Passive film",

author = "Zhaodong Li and Runnong Chen and Yanguang Cao and Bo Gao and Qilong Yong and Qifu Zhang and Xiaogang Li",

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year = "2024",

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day = "1",

doi = "10.1016/j.corsci.2024.111983",

language = "英语",

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journal = "Corrosion Science",

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TY - JOUR

T1 - Function of Cu-Sb or Al microalloying on the corrosion resistance of 9Cr steel exposed to simulated concrete pore solution

AU - Li, Zhaodong

AU - Chen, Runnong

AU - Cao, Yanguang

AU - Gao, Bo

AU - Yong, Qilong

AU - Zhang, Qifu

AU - Li, Xiaogang

PY - 2024/5/1

Y1 - 2024/5/1

N2 - The role of Cu-Sb or Al on the passivation and Cl-induced depassivation of 9Cr steel in simulated concrete pore solution was systematically obtained via electrochemical tests and microstructure characterization. Both microalloying enhanced electrochemical passivation even if the solution pH dropped. Cu and Al participated in the formation of natural passive film, and the properties of passive film were optimized in terms of resistance, composition, and inner film thickness. However, the chloride threshold level (CTL) was not increased with Cu-Sb microalloying and even decreased with Al microalloying, which is understood from the stability of Al-containing products and the hazards of inclusions.

AB - The role of Cu-Sb or Al on the passivation and Cl-induced depassivation of 9Cr steel in simulated concrete pore solution was systematically obtained via electrochemical tests and microstructure characterization. Both microalloying enhanced electrochemical passivation even if the solution pH dropped. Cu and Al participated in the formation of natural passive film, and the properties of passive film were optimized in terms of resistance, composition, and inner film thickness. However, the chloride threshold level (CTL) was not increased with Cu-Sb microalloying and even decreased with Al microalloying, which is understood from the stability of Al-containing products and the hazards of inclusions.

KW - 9Cr steel rebar

KW - Al adding

KW - Chloride threshold level

KW - Cu-Sb adding

KW - Passive film

UR - https://www.scopus.com/pages/publications/85187207189

U2 - 10.1016/j.corsci.2024.111983

DO - 10.1016/j.corsci.2024.111983

M3 - 文章

AN - SCOPUS:85187207189

SN - 0010-938X

VL - 231

JO - Corrosion Science

JF - Corrosion Science

M1 - 111983

ER -

Function of Cu-Sb or Al microalloying on the corrosion resistance of 9Cr steel exposed to simulated concrete pore solution

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Keywords

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