Unraveling the effect of Al2O3-MnS complex inclusion on the pitting corrosion behavior of dual phase steel

Heng Chen; Guosheng Ma; Lin Lu; Yunhua Huang; Xiaogang Li

doi:10.1016/j.corsci.2024.111938

Unraveling the effect of Al₂O₃-MnS complex inclusion on the pitting corrosion behavior of dual phase steel

Heng Chen
, Guosheng Ma
, Lin Lu^*
, Yunhua Huang^*
, Xiaogang Li

^*Corresponding author for this work

University of Science and Technology Beijing
National Materials Corrosion and Protection Data Center

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

17 Scopus citations

Abstract

Pitting corrosion behavior of dual phase steel triggered by Al₂O₃-MnS complex inclusion in NaCl solution was investigated. Results indicated that neither micro-defects nor strain fields existed around the insulating Al₂O₃-MnS inclusion, but an open circular pit was immediately initiated around the inclusion and grew in diameter approaching 200 μm in several minutes. The preferential dissolution of unstable MnS part created local acidic electrolytes promoting the dissolution of Al₂O₃ part and adjacent matrix. The radial diffusion and hydrolysis of Al³⁺ acidified the pit solution, resulting in the propagation of circular pit. Finally, the pitting propagation decelerated with the depletion of inclusion.

Original language	English
Article number	111938
Journal	Corrosion Science
Volume	230
DOIs	https://doi.org/10.1016/j.corsci.2024.111938
State	Published - 15 Apr 2024
Externally published	Yes

Keywords

Complex inclusion
Dual phase steel
Pitting corrosion
ToF-SIMS

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10.1016/j.corsci.2024.111938

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title = "Unraveling the effect of Al2O3-MnS complex inclusion on the pitting corrosion behavior of dual phase steel",

abstract = "Pitting corrosion behavior of dual phase steel triggered by Al2O3-MnS complex inclusion in NaCl solution was investigated. Results indicated that neither micro-defects nor strain fields existed around the insulating Al2O3-MnS inclusion, but an open circular pit was immediately initiated around the inclusion and grew in diameter approaching 200 μm in several minutes. The preferential dissolution of unstable MnS part created local acidic electrolytes promoting the dissolution of Al2O3 part and adjacent matrix. The radial diffusion and hydrolysis of Al3+ acidified the pit solution, resulting in the propagation of circular pit. Finally, the pitting propagation decelerated with the depletion of inclusion.",

keywords = "Complex inclusion, Dual phase steel, Pitting corrosion, ToF-SIMS",

author = "Heng Chen and Guosheng Ma and Lin Lu and Yunhua Huang and Xiaogang Li",

note = "Publisher Copyright: {\textcopyright} 2024",

year = "2024",

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day = "15",

doi = "10.1016/j.corsci.2024.111938",

language = "英语",

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TY - JOUR

T1 - Unraveling the effect of Al2O3-MnS complex inclusion on the pitting corrosion behavior of dual phase steel

AU - Chen, Heng

AU - Ma, Guosheng

AU - Lu, Lin

AU - Huang, Yunhua

AU - Li, Xiaogang

PY - 2024/4/15

Y1 - 2024/4/15

N2 - Pitting corrosion behavior of dual phase steel triggered by Al2O3-MnS complex inclusion in NaCl solution was investigated. Results indicated that neither micro-defects nor strain fields existed around the insulating Al2O3-MnS inclusion, but an open circular pit was immediately initiated around the inclusion and grew in diameter approaching 200 μm in several minutes. The preferential dissolution of unstable MnS part created local acidic electrolytes promoting the dissolution of Al2O3 part and adjacent matrix. The radial diffusion and hydrolysis of Al3+ acidified the pit solution, resulting in the propagation of circular pit. Finally, the pitting propagation decelerated with the depletion of inclusion.

AB - Pitting corrosion behavior of dual phase steel triggered by Al2O3-MnS complex inclusion in NaCl solution was investigated. Results indicated that neither micro-defects nor strain fields existed around the insulating Al2O3-MnS inclusion, but an open circular pit was immediately initiated around the inclusion and grew in diameter approaching 200 μm in several minutes. The preferential dissolution of unstable MnS part created local acidic electrolytes promoting the dissolution of Al2O3 part and adjacent matrix. The radial diffusion and hydrolysis of Al3+ acidified the pit solution, resulting in the propagation of circular pit. Finally, the pitting propagation decelerated with the depletion of inclusion.

KW - Complex inclusion

KW - Dual phase steel

KW - Pitting corrosion

KW - ToF-SIMS

UR - https://www.scopus.com/pages/publications/85185879571

U2 - 10.1016/j.corsci.2024.111938

DO - 10.1016/j.corsci.2024.111938

M3 - 文章

AN - SCOPUS:85185879571

SN - 0010-938X

VL - 230

JO - Corrosion Science

JF - Corrosion Science

M1 - 111938

ER -

Unraveling the effect of Al₂O₃-MnS complex inclusion on the pitting corrosion behavior of dual phase steel

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Keywords

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