Mechanistic study on the cut-edge corrosion behaviors of Zn-Al-Mg alloy coated steel sheets in chloride containing environments

Jae Won Lee; Bo Ra Park; Se Young Oh; Dae Won Yun; Joong Ki Hwang; Min Suk Oh; Sung Jin Kim

doi:10.1016/j.corsci.2019.108170

Mechanistic study on the cut-edge corrosion behaviors of Zn-Al-Mg alloy coated steel sheets in chloride containing environments

Jae Won Lee
, Bo Ra Park
, Se Young Oh
, Dae Won Yun
, Joong Ki Hwang
, Min Suk Oh^*
, Sung Jin Kim

^*Corresponding author for this work

Metallurgical System Engineering

Pohang Institute of Metal Industry Advancement
Korea Institute of Materials Science
Tongmyong University
Sunchon National University

Research output: Contribution to journal › Journal article › peer-review

100 Scopus citations

Abstract

To understand the cut-edge corrosion behaviors of Zn-Al-Mg alloy-coated steel better, mechanistic studies with a Zn-MgZn₂ eutectic specimen fabricated by a hot-pressing process were conducted using various electrochemical methods, such as the scanning vibrating electrode technique and galvanic corrosion measurements. The results showed that the MgZn₂ phase dissolved preferentially with the galvanic current flowing from the phase to Zn. Mg/Zn cations from the dissolving MgZn₂ phase were reduced effectively, facilitating the co-precipitation of Mg(OH)₂, Zn₅(CO₃)₂(OH)₆, and Zn₅(OH)₈Cl₂·H₂O, which was confirmed by X-ray photoelectron spectroscopy. Based on the results, a much longer-lasting corrosion inhibition mechanism of the alloy-coated steel was provided.

Original language	English
Article number	108170
Journal	Corrosion Science
Volume	160
DOIs	https://doi.org/10.1016/j.corsci.2019.108170
State	Published - 2019.11

Keywords

Corrosion
Hot-dip galvanizing
Scanning vibrating electrode technique
Zn-Al-Mg alloy coatings

Quacquarelli Symonds(QS) Subject Topics

Materials Science
Engineering - Chemical
Chemistry

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10.1016/j.corsci.2019.108170

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@article{0cd8bd08fb9d480b8c27bf64d936cc85,

title = "Mechanistic study on the cut-edge corrosion behaviors of Zn-Al-Mg alloy coated steel sheets in chloride containing environments",

abstract = "To understand the cut-edge corrosion behaviors of Zn-Al-Mg alloy-coated steel better, mechanistic studies with a Zn-MgZn2 eutectic specimen fabricated by a hot-pressing process were conducted using various electrochemical methods, such as the scanning vibrating electrode technique and galvanic corrosion measurements. The results showed that the MgZn2 phase dissolved preferentially with the galvanic current flowing from the phase to Zn. Mg/Zn cations from the dissolving MgZn2 phase were reduced effectively, facilitating the co-precipitation of Mg(OH)2, Zn5(CO3)2(OH)6, and Zn5(OH)8Cl2·H2O, which was confirmed by X-ray photoelectron spectroscopy. Based on the results, a much longer-lasting corrosion inhibition mechanism of the alloy-coated steel was provided.",

keywords = "Corrosion, Hot-dip galvanizing, Scanning vibrating electrode technique, Zn-Al-Mg alloy coatings",

author = "Lee, \{Jae Won\} and Park, \{Bo Ra\} and Oh, \{Se Young\} and Yun, \{Dae Won\} and Hwang, \{Joong Ki\} and Oh, \{Min Suk\} and Kim, \{Sung Jin\}",

note = "Publisher Copyright: {\textcopyright} 2019 Elsevier Ltd",

year = "2019",

month = nov,

doi = "10.1016/j.corsci.2019.108170",

language = "English",

volume = "160",

journal = "Corrosion Science",

issn = "0010-938X",

}

TY - JOUR

T1 - Mechanistic study on the cut-edge corrosion behaviors of Zn-Al-Mg alloy coated steel sheets in chloride containing environments

AU - Lee, Jae Won

AU - Park, Bo Ra

AU - Oh, Se Young

AU - Yun, Dae Won

AU - Hwang, Joong Ki

AU - Oh, Min Suk

AU - Kim, Sung Jin

PY - 2019/11

Y1 - 2019/11

N2 - To understand the cut-edge corrosion behaviors of Zn-Al-Mg alloy-coated steel better, mechanistic studies with a Zn-MgZn2 eutectic specimen fabricated by a hot-pressing process were conducted using various electrochemical methods, such as the scanning vibrating electrode technique and galvanic corrosion measurements. The results showed that the MgZn2 phase dissolved preferentially with the galvanic current flowing from the phase to Zn. Mg/Zn cations from the dissolving MgZn2 phase were reduced effectively, facilitating the co-precipitation of Mg(OH)2, Zn5(CO3)2(OH)6, and Zn5(OH)8Cl2·H2O, which was confirmed by X-ray photoelectron spectroscopy. Based on the results, a much longer-lasting corrosion inhibition mechanism of the alloy-coated steel was provided.

AB - To understand the cut-edge corrosion behaviors of Zn-Al-Mg alloy-coated steel better, mechanistic studies with a Zn-MgZn2 eutectic specimen fabricated by a hot-pressing process were conducted using various electrochemical methods, such as the scanning vibrating electrode technique and galvanic corrosion measurements. The results showed that the MgZn2 phase dissolved preferentially with the galvanic current flowing from the phase to Zn. Mg/Zn cations from the dissolving MgZn2 phase were reduced effectively, facilitating the co-precipitation of Mg(OH)2, Zn5(CO3)2(OH)6, and Zn5(OH)8Cl2·H2O, which was confirmed by X-ray photoelectron spectroscopy. Based on the results, a much longer-lasting corrosion inhibition mechanism of the alloy-coated steel was provided.

KW - Corrosion

KW - Hot-dip galvanizing

KW - Scanning vibrating electrode technique

KW - Zn-Al-Mg alloy coatings

UR - https://www.scopus.com/pages/publications/85070791627

U2 - 10.1016/j.corsci.2019.108170

DO - 10.1016/j.corsci.2019.108170

M3 - Journal article

AN - SCOPUS:85070791627

SN - 0010-938X

VL - 160

JO - Corrosion Science

JF - Corrosion Science

M1 - 108170

ER -

Mechanistic study on the cut-edge corrosion behaviors of Zn-Al-Mg alloy coated steel sheets in chloride containing environments

Abstract

Keywords

Quacquarelli Symonds(QS) Subject Topics

Access to Document

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