In-situ AFM and quasi-in-situ studies for localized corrosion in Mg-9Al-1Fe-(Gd) alloys under 3.5 wt.% NaCl environment  

作　　者：Junping Shen Tao Lai Zheng Yin Yang Chen Kun Wang Hong Yan Honggun Song Ruiliang Liu Chao Luo Zhi Hu 

机构地区：[1]School of Advanced Manufacturing,Nanchang University,Nanchang 330031,China [2]Institute for Advanced Study,Nanchang University,Nanchang 330031,China [3]Singapore Centre for Environmental Life Sciences Engineering,Nanyang Technological University,60 Nanyang Drive 637751,Singapore

出　　处：《Journal of Magnesium and Alloys》2024年第3期1170-1185,共16页镁合金学报（英文）

基　　金：support by the National Natural Science Foundation of China(51961026);the Interdisciplinary Innovation Fund of Nanchang University(Project No.2019-9166-27060003).

摘　　要：Revealing the localized corrosion process of Mg alloy is considered as one of the most significant ways for improving its corrosion resistance.The reliable monitor should be high distinguishability and real-time in liquid environment.Herein,Mg-9Al-1Fe and Mg-9Al-1Fe-1Gd alloys were designed to highlight the impact of intermetallic on the corrosion behaviour.In-situ AFM with a special electrolyte circulation system and quasi-in-situ SEM observation were used to monitor the corrosion process of the designed alloys.SEM-EDS and TEM-SAED were applied to identify the intermetallic in the designed alloys,and their volta potentials were measured by SKPFM.According to the real-time and real-space in-situ AFM monitor,the corrosion process consisted of dissolution of anodicα-Mg phase,accumulation of corrosion products around cathodic phase and shedding of some fine cathodic phase.Then,the localized corrosion process of Mg alloy was revealed combined with the results of the monitor of corrosion process and Volta potential difference.

关 键 词：Magnesium Localized corrosion In-situ AFM SKPFM Corrosion behaviour. 

分 类 号：TG178[金属学及工艺—金属表面处理]