Relationship between elements migration of α-AlFeMnSi phase and micro-galvanic corrosion sensitivity of Al-Zn-Mg alloy

被引：12

作者：

Ao, Min ^{[1
]}

Ji, Yucheng ^{[1
]}

Yi, Pan ^{[2
]}

Li, Ni ^{[1
]}

Wang, Li ^{[1
]}

Xiao, Kui ^{[1
]}

Dong, Chaofang ^{[1
]}

机构：

[1] Univ Sci & Technol Beijing, Beijing Adv Innovat Ctr Mat Genome Engn, Inst Adv Mat & Technol, Beijing 100083, Peoples R China

[2] China Elect Power Res Inst, Beijing 100192, Peoples R China

来源：

INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS | 2023年 / 30卷 / 01期

基金：

中国国家自然科学基金;

关键词：

Al-Zn-Mg alloy; corrosion behavior; alpha-AlFeMnSi phase; first principles calculations; PROBE FORCE MICROSCOPY; MECHANICAL-PROPERTIES; ALUMINUM-ALLOY; MICROSTRUCTURE; EVOLUTION; BEHAVIOR; RECRYSTALLIZATION; PRECIPITATION; INTERMETALLICS; SEGREGATION;

D O I：

10.1007/s12613-022-2428-1

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

First principles calculations and scanning Kelvin probe force microscopy (SKPFM) were used to investigate the effect of elements migration of alpha-AlFeMnSi phase on micro-galvanic corrosion behavior of Al-Zn-Mg alloy. The simulation results showed that the average work function difference between the alpha-AlFeMnSi phase and Al matrix decreased from 0.232 to 0.065 eV due to the synchronous migration of elements Fe-Mn-Si. Specifically, as the elements Fe-Si migration during the extrusion process, the average Volta potential difference detected by SKPFM between the alpha-AlFeMnSi phase and Al matrix dropped down to 432.383 mV from 648.370 mV. Thus, the elements migration reduced the micro-galvanic corrosion sensitivity of Al-Zn-Mg alloy. To reach the calculated low micro-galvanic tendency between alpha-AlFeMnSi phase and Al matrix, the diffusion of Mn should be promoted during extruding process.

引用

页码：112 / 121

页数：10

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