Al-In-Mg系铝合金阳极在NaOH溶液中的电化学行为

Electrochemical behavior of Anodes Based on Al-In-Mg Alloys in NaOH Solution

以Al In Mg合金为基础,选择添加Pb、Mn、Sn制备了4类铝合金阳极材料。通过自腐蚀、开路电位、阳极极化方式研究了该系列合金阳极在c(NaOH)=4mol/L溶液中的电化学腐蚀行为,初步分析了合金成分、介质温度及溶液缓蚀剂对合金阳极性能的影响。结果发现:制备的3#(Al In Mg Sn)合金、4#(Al In Mg Sn Pb)合金阳极在c(NaOH)=4mol/L+c(Na2SnO3)=0.04mol/L溶液中表现出更好的电化学性能,具有比纯铝(99.95%)更负的开路电位,更小的自腐蚀速率和更低的阳极极化。

Anode materials based on Al-In-Mg alloys adding the alloying elements Pb、Mn and Sn were prepared.Their electrochemical corrosion behavior were investigated in NaOH solution by studying the self corrosion,open-circuit potential and anodic polarization.The influence of alloying elements,temperature of solution and adding corrosion inhibitor on the anodic performance were also analyzed.It was found that 3#(Al-In-Mg-Sn) and 4#(Al-In-Mg-Sn-Pb) alloys show preferable electrochemical performance with more negative open circuit potential,lower self corrosion and smaller anodic polarization than those of pure aluminium (99.95% purity) in c(NaOH)=4 mol/L sloution containing c(Na2SnO3)=0.04 mol/L.