Initial dissolution of Mg-containing phase and corrosion product formation in cut-edge corrosion of Zn-11%Al-3%Mg-0.2%Si coated steel

被引：7

作者：

Tokuda, Shimpei ^{[1
]}

Nishida, Yoshikatsu ^{[1
]}

Nishimoto, Masashi ^{[2
]}

Muto, Izumi ^{[2
]}

Shoji, Hiromasa ^{[1
,3
]}

机构：

[1] Nippon Steel Corp Ltd, Steel Res Labs, 20-1 Shintomi, Futtsu, Chiba 2938511, Japan

[2] Tohoku Univ, Grad Sch Engn, Dept Mat Sci, 6-6-02 Aramaki Aza-aoba,Aoba Ku, Sendai 9808579, Japan

[3] Nippon Steel Technol Co Ltd, R&D Supporting Unit, 20-1 Shintomi, Futtsu, Chiba 2930011, Japan

来源：

CORROSION SCIENCE | 2023年 / 225卷

关键词：

Zn-Al-Mg coated steel; Zn-11%Al-3%Mg-0.2%Si; Corrosion product; Cut-edge corrosion; Galvanic corrosion; Polarization; ZN-MG; ELECTROCHEMICAL REDUCTION; GALVANIC CORROSION; AL; ALLOY; RESISTANCE; MAGNESIUM; COATINGS; MICROSTRUCTURE; MECHANISMS;

D O I：

10.1016/j.corsci.2023.111605

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Simulated cut-edge specimens of Zn-11%Al-3%Mg-0.2%Si coated steel were fabricated, and their corrosion behaviors were assessed using salt spray test (SST). The Mg-containing phases in the coating near the simulated cut-edge dissolved during early corrosion, leading to the formation of protective corrosion products on the steel surface. The corrosion products suppressed the oxygen reduction reaction on the steel. Additionally, the anodic dissolution rate of the coating layer decreased after the SST. Consequently, the cut-edge corrosion rate of the ZnAl-Mg coating after the deposition of the corrosion products decreased compared with that of a conventional Zn coating.

引用

页数：13

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