EIS studies the effect of Zinc to Al-Zn alloy used for cathodic protection in 3% NaCl solution  

电化学阻抗谱研究Zn对用于阴极保护的Al-Zn合金在3%NaCl溶液中溶解行为的影响（英文）

作　　者：郝小军[1] 雷英春[2] 侯华[1] 赵宇宏[1] 王一都 

机构地区：[1]中北大学材料学院,山西太原030051 [2]太原工业学院环境与安全工程系,山西太原030008

出　　处：《Journal of Measurement Science and Instrumentation》2017年第2期110-118,共9页测试科学与仪器（英文版）

基　　金：National Natural Science Foundation of China(Nos.51204147,51274175,51574206,51574207);Program for International S&T Cooperation Projects of China(No.2014DFA50320);Program for International S&T Cooperation Projects of Shanxi Province(No.201381017);Technological Projects of Shanxi Province(No.20150313002-3)

摘　　要：Electrochemical impendence spectroscopy （EIS） is applied to investigate the dissolution behavior of Al-Zn alloys in 3% NaCl solution at different polarization potentials. A new reaction model is proposed, and the activation mechanism of zinc in Al-Zn alloys is achieved. There are three intermediates in the dissolution process： Znad^＋, Znad^2＋ and Alad^＋, ,of which only Zni can activate Al-Zn alloys. Most Znnd^＋ is produced by β-phase,and the alloys with 2. 3% - 3. 8% （wt） Zn dissolve rapidly. The Al-Zn alloys of heart-shaped EIS are active in 3% NaCl solution, thus EIS characteristic can be used to distinguish the activa-tion of Al-Zn alloys.

关 键 词：Al-Zn alloy sacrificial anode reaction model electrochemical impendence spectroscopy （EIS ） activation mecha-nism zinc enrichment phase （β-phase） 

分 类 号：TG174.41[金属学及工艺—金属表面处理]