Micro-galvanic corrosion behaviour of Mg-(7,9)Al-1Fe-xNd alloys

作     者：Kai-xuan FENG Tao LAI Yang CHEN Zheng YIN Zhi-qin WU Hong YAN Hong-gun SONG Chao LUO Zhi HU 冯开轩;赖涛;陈扬;殷正;吴志勤;闫洪;宋红滚;罗超;胡志

作者机构：School of Advanced ManufacturingNanchang UniversityNanchang 330031China Institute for Advanced StudyNanchang UniversityNanchang 330031China 

出 版 物：《Transactions of Nonferrous Metals Society of China》 (中国有色金属学报（英文版）)

年 卷 期：2024年第34卷第9期

页      面：2828-2848页

核心收录：

学科分类：080503[工学-材料加工工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：financial support from the National Natural Science Foundation of China(No.51961026) 

主　　题：magnesium alloy scanning Kelvin probe force microscope micro-galvanic corrosion in situ observation atomic force microscopy 

摘      要：The localized micro-galvanic corrosion process and the kinetic information of Mg-(7,9)Al-1Fe-x Nd alloys were investigated by in situ observation under electrochemical control and in situ atomic force microscopy(AFM)in an electrolyte *** results revealed that the formation of the Nd-rich phase in alloys resulted in a decrease in the Volta potential difference from~400 m V(AlFe3/α-Mg)to~220 mV(Nd-rich/α-Mg),reducing the corrosion products around the cathodic phase and corrosion current density of the microscale *** addition of Nd significantly improved the corrosion resistance,mainly due to the suppression of the micro-galvanic corrosion between the second phases and ***,the corrosion mechanism of Mg-(7,9)Al-1Fe-x Nd alloys was discussed based on in situ observations and electrochemical results.