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

作     者：Min Ao Yucheng Ji Pan Yi Ni Li Li Wang Kui Xiao Chaofang Dong Ao Min;Ji Yucheng;Yi Pan;Li Ni;Wang Li;Xiao Kui;Dong Chaofang

作者机构：Beijing Advanced Innovation Center for Materials Genome EngineeringInstitute for Advanced Materials and TechnologyUniversity of Science and Technology BeijingBeijing 100083China China Electric Power Research InstituteBeijing 100192China 

出 版 物：《International Journal of Minerals,Metallurgy and Materials》 (矿物冶金与材料学报（英文版）)

年 卷 期：2023年第30卷第1期

页      面：112-121页

核心收录：

学科分类：0806[工学-冶金工程] 08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：supported by the National Natural Science Foundation of China(No.52125102) the Fundamental Research Funds for the Central Universities(No.FRF-TP-20-01B) the Guangdong Basic and Applied Basic Research Foundation(No.2020B1515120093) the Special Fund Support for Taishan Industrial Leading Talents Project 

主　　题：Al-Zn-Mg alloy corrosion behavior α-AlFeMnSi phase first principles calculations 

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