Understanding the mechanism of shrinkage defects on corrosion kinetics of ductile iron

Tianqi Chen; Fansong Wu; Can Li; Xuequn Cheng; Xiaogang Li; Yongfeng Chen; Chao Liu

doi:10.1016/j.corsci.2025.113168

Understanding the mechanism of shrinkage defects on corrosion kinetics of ductile iron

Tianqi Chen
, Fansong Wu
, Can Li
, Xuequn Cheng
, Xiaogang Li
, Yongfeng Chen
, Chao Liu^*

^*Corresponding author for this work

University of Science and Technology Beijing
Xinxing Ductile Iron Pipes Co., Ltd.

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

5 Scopus citations

Abstract

The mechanism of shrinkage defects on corrosion kinetics of ductile iron is investigated. Shrinkage defects increase the corrosion current density from 11.14 μA/cm² to 16.14 μA/cm² at 303 K and decrease the polarization resistance across different temperatures. The corrosion products surrounding the defects exhibit a loose structure with microcracks. A critical temperature of 308 K was identified between defect-driven corrosion and thermally-driven corrosion. A complex cooperative competition relationship between temperature and defects is revealed. Shrinkage defects remarkably accelerate the corrosion kinetics process by lowering the activation energy and modifying the transformation of corrosion products.

Original language	English
Article number	113168
Journal	Corrosion Science
Volume	256
DOIs	https://doi.org/10.1016/j.corsci.2025.113168
State	Published - Nov 2025
Externally published	Yes

Keywords

Corrosion kinetics
Corrosion mechanism
Ductile iron
Shrinkage defects

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10.1016/j.corsci.2025.113168

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title = "Understanding the mechanism of shrinkage defects on corrosion kinetics of ductile iron",

abstract = "The mechanism of shrinkage defects on corrosion kinetics of ductile iron is investigated. Shrinkage defects increase the corrosion current density from 11.14 μA/cm² to 16.14 μA/cm² at 303 K and decrease the polarization resistance across different temperatures. The corrosion products surrounding the defects exhibit a loose structure with microcracks. A critical temperature of 308 K was identified between defect-driven corrosion and thermally-driven corrosion. A complex cooperative competition relationship between temperature and defects is revealed. Shrinkage defects remarkably accelerate the corrosion kinetics process by lowering the activation energy and modifying the transformation of corrosion products.",

keywords = "Corrosion kinetics, Corrosion mechanism, Ductile iron, Shrinkage defects",

author = "Tianqi Chen and Fansong Wu and Can Li and Xuequn Cheng and Xiaogang Li and Yongfeng Chen and Chao Liu",

note = "Publisher Copyright: {\textcopyright} 2025 Elsevier Ltd",

year = "2025",

month = nov,

doi = "10.1016/j.corsci.2025.113168",

language = "英语",

volume = "256",

journal = "Corrosion Science",

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T1 - Understanding the mechanism of shrinkage defects on corrosion kinetics of ductile iron

AU - Chen, Tianqi

AU - Wu, Fansong

AU - Li, Can

AU - Cheng, Xuequn

AU - Li, Xiaogang

AU - Chen, Yongfeng

AU - Liu, Chao

PY - 2025/11

Y1 - 2025/11

N2 - The mechanism of shrinkage defects on corrosion kinetics of ductile iron is investigated. Shrinkage defects increase the corrosion current density from 11.14 μA/cm² to 16.14 μA/cm² at 303 K and decrease the polarization resistance across different temperatures. The corrosion products surrounding the defects exhibit a loose structure with microcracks. A critical temperature of 308 K was identified between defect-driven corrosion and thermally-driven corrosion. A complex cooperative competition relationship between temperature and defects is revealed. Shrinkage defects remarkably accelerate the corrosion kinetics process by lowering the activation energy and modifying the transformation of corrosion products.

AB - The mechanism of shrinkage defects on corrosion kinetics of ductile iron is investigated. Shrinkage defects increase the corrosion current density from 11.14 μA/cm² to 16.14 μA/cm² at 303 K and decrease the polarization resistance across different temperatures. The corrosion products surrounding the defects exhibit a loose structure with microcracks. A critical temperature of 308 K was identified between defect-driven corrosion and thermally-driven corrosion. A complex cooperative competition relationship between temperature and defects is revealed. Shrinkage defects remarkably accelerate the corrosion kinetics process by lowering the activation energy and modifying the transformation of corrosion products.

KW - Corrosion kinetics

KW - Corrosion mechanism

KW - Ductile iron

KW - Shrinkage defects

UR - https://www.scopus.com/pages/publications/105009827303

U2 - 10.1016/j.corsci.2025.113168

DO - 10.1016/j.corsci.2025.113168

M3 - 文章

AN - SCOPUS:105009827303

SN - 0010-938X

VL - 256

JO - Corrosion Science

JF - Corrosion Science

M1 - 113168

ER -

Understanding the mechanism of shrinkage defects on corrosion kinetics of ductile iron

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Keywords

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