Micro-electrochemical investigation on the role of Mg in sacrificial corrosion protection of 55mass%Al-Zn-Mg coated steel

Shimpei Tokuda; Izumi Muto; Yu Sugawara; Michiyasu Takahashi; Masamitsu Matsumoto; Nobuyoshi Hara

doi:10.1016/j.corsci.2017.07.020

Micro-electrochemical investigation on the role of Mg in sacrificial corrosion protection of 55mass%Al-Zn-Mg coated steel

Shimpei Tokuda, Izumi Muto, Yu Sugawara, Michiyasu Takahashi, Masamitsu Matsumoto, Nobuyoshi Hara

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

18 Citations (Scopus)

Abstract

The effects of Mg on the anodic dissolution behavior of the 55mass%Al-Zn coating layer were determined by in situ observation during galvanostatic polarization. The Zn-‍rich phases were observed to corrode at lower potentials than the dissolution potential region of the Al-rich matrix phases, and the dissolution duration of the Zn-rich phases was prolonged by Mg addition. Moreover, the corrosion products of the 55mass%Al-Zn-Mg coating layer were suggested to inhibit the oxygen reduction reaction on the steel substrate. The sacrificial corrosion protection mechanisms due to the addition of Mg to the 55mass%Al-‍Zn coating layer were discussed.

Original language	English
Pages (from-to)	126-135
Number of pages	10
Journal	Corrosion Science
Volume	129
DOIs	https://doi.org/10.1016/j.corsci.2017.07.020
Publication status	Published - 2017 Dec

Keywords

A. Magnesium
A. Metal coatings
A. Zinc
B. Galvanostatic
B. Polarization
C. Anodic dissolution

ASJC Scopus subject areas

Chemistry(all)
Chemical Engineering(all)
Materials Science(all)

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10.1016/j.corsci.2017.07.020

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title = "Micro-electrochemical investigation on the role of Mg in sacrificial corrosion protection of 55mass%Al-Zn-Mg coated steel",

abstract = "The effects of Mg on the anodic dissolution behavior of the 55mass%Al-Zn coating layer were determined by in situ observation during galvanostatic polarization. The Zn-‍rich phases were observed to corrode at lower potentials than the dissolution potential region of the Al-rich matrix phases, and the dissolution duration of the Zn-rich phases was prolonged by Mg addition. Moreover, the corrosion products of the 55mass%Al-Zn-Mg coating layer were suggested to inhibit the oxygen reduction reaction on the steel substrate. The sacrificial corrosion protection mechanisms due to the addition of Mg to the 55mass%Al-‍Zn coating layer were discussed.",

keywords = "A. Magnesium, A. Metal coatings, A. Zinc, B. Galvanostatic, B. Polarization, C. Anodic dissolution",

author = "Shimpei Tokuda and Izumi Muto and Yu Sugawara and Michiyasu Takahashi and Masamitsu Matsumoto and Nobuyoshi Hara",

note = "Funding Information: Y. S. is grateful for the funding of his research by JSPS KAKENHI of Japan (Grant Number JP15H05550). This work was supported through the Program for Leading Graduate Schools, “Interdepartmental Doctoral Degree Program for Multi-dimensional Materials Science Leaders”, by the Ministry of Education, Culture, Sports, Science and Technology of Japan. Publisher Copyright: {\textcopyright} 2017 Elsevier Ltd",

year = "2017",

month = dec,

doi = "10.1016/j.corsci.2017.07.020",

language = "English",

volume = "129",

pages = "126--135",

journal = "Corrosion Science",

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T1 - Micro-electrochemical investigation on the role of Mg in sacrificial corrosion protection of 55mass%Al-Zn-Mg coated steel

AU - Tokuda, Shimpei

AU - Muto, Izumi

AU - Sugawara, Yu

AU - Takahashi, Michiyasu

AU - Matsumoto, Masamitsu

AU - Hara, Nobuyoshi

N1 - Funding Information: Y. S. is grateful for the funding of his research by JSPS KAKENHI of Japan (Grant Number JP15H05550). This work was supported through the Program for Leading Graduate Schools, “Interdepartmental Doctoral Degree Program for Multi-dimensional Materials Science Leaders”, by the Ministry of Education, Culture, Sports, Science and Technology of Japan. Publisher Copyright: © 2017 Elsevier Ltd

PY - 2017/12

Y1 - 2017/12

N2 - The effects of Mg on the anodic dissolution behavior of the 55mass%Al-Zn coating layer were determined by in situ observation during galvanostatic polarization. The Zn-‍rich phases were observed to corrode at lower potentials than the dissolution potential region of the Al-rich matrix phases, and the dissolution duration of the Zn-rich phases was prolonged by Mg addition. Moreover, the corrosion products of the 55mass%Al-Zn-Mg coating layer were suggested to inhibit the oxygen reduction reaction on the steel substrate. The sacrificial corrosion protection mechanisms due to the addition of Mg to the 55mass%Al-‍Zn coating layer were discussed.

AB - The effects of Mg on the anodic dissolution behavior of the 55mass%Al-Zn coating layer were determined by in situ observation during galvanostatic polarization. The Zn-‍rich phases were observed to corrode at lower potentials than the dissolution potential region of the Al-rich matrix phases, and the dissolution duration of the Zn-rich phases was prolonged by Mg addition. Moreover, the corrosion products of the 55mass%Al-Zn-Mg coating layer were suggested to inhibit the oxygen reduction reaction on the steel substrate. The sacrificial corrosion protection mechanisms due to the addition of Mg to the 55mass%Al-‍Zn coating layer were discussed.

KW - A. Magnesium

KW - A. Metal coatings

KW - A. Zinc

KW - B. Galvanostatic

KW - B. Polarization

KW - C. Anodic dissolution

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U2 - 10.1016/j.corsci.2017.07.020

DO - 10.1016/j.corsci.2017.07.020

M3 - Article

AN - SCOPUS:85031506585

SN - 0010-938X

VL - 129

SP - 126

EP - 135

JO - Corrosion Science

JF - Corrosion Science

ER -

Micro-electrochemical investigation on the role of Mg in sacrificial corrosion protection of 55mass%Al-Zn-Mg coated steel

Abstract

Keywords

ASJC Scopus subject areas

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