Corrosion behaviour of hot-dip Al-Zn-Si and Al-Zn-Si-3Mg coatings in NaCl solution

被引：72
|
作者：
Liu, Wei [1 ,2 ,3 ]
Li, Qian [1 ,2 ,3 ,4 ]
Li, Mou-Cheng [5 ]
机构：
[1] Shanghai Univ, State Key Lab Adv Special Steel, 149 Yanchang Rd, Shanghai 200072, Peoples R China
[2] Shanghai Univ, Shanghai Key Lab Adv Ferromet, 149 Yanchang Rd, Shanghai 200072, Peoples R China
[3] Shanghai Univ, Sch Mat Sci & Engn, 149 Yanchang Rd, Shanghai 200072, Peoples R China
[4] Shanghai Univ, Mat Genome Inst, 99 Shangda Rd, Shanghai 200444, Peoples R China
[5] Shanghai Univ, Sch Mat Sci & Engn, Inst Mat, Lab Microstruct, 149 Yanchang Rd, Shanghai 200072, Peoples R China
来源：
CORROSION SCIENCE | 2017年 / 121卷
基金：
中国国家自然科学基金;
关键词：
Magnesium; Metal coatings; Weight loss; EIS; ZN(MG; AL) COATED STEEL; CUT-EDGE CORROSION; ALUMINUM-ALLOYS; ZINC; PRODUCTS; MG; RESISTANCE; ELECTRODE; PHASES; PERFORMANCE;
D O I：
10.1016/j.corsci.2017.03.013
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The corrosion behaviour of hot-dip Al-Zn-Si and Al-Zn-Si-3Mg coatings on steel sheets in NaCl solution were investigated by microstructural characterization, weight loss tests, and electrochemical methods Localized corrosion of the Al-rich phase in the Al-Zn-Si coating was observed. The exposure of the intermetallic layer was supposed to present galvanic corrosion and remarkably accelerate the consumption of remnant Al-rich phase. The MgZn2 phase was detected in the interdendritic Zn-rich region of the Al-Zn-Si-3Mg coating. The presence of the MgZn2 and Mg2Si phases contributed to delaying the occurrence of localized corrosion. (C) 2017 Elsevier Ltd. All rights reserved.
引用
收藏
页码：72 / 83
页数：12
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