The corrosion and electrochemical behavior of pure aluminum in additive-containing alkaline methanol-water mixed solutions
The corrosion and electrochemical behavior of pure aluminum in additive-containing alkaline methanol-water mixed solutions
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DOI：
10.1002/maco.200805074
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发表时间：
2009-04-01
影响因子：
1.8
通讯作者：
Cao, C. N.
中科院分区：
文献类型：
--
作者：
Wang, J. B.;Wang, J. M.;Cao, C. N.
采用氢收集、极化曲线、恒电流放电和电化学阻抗谱（EIS）等方法研究了铝在4 M KOH-甲醇-水（甲醇/水体积比为3：2）混合溶液中的腐蚀和电化学行为。氢收集和电化学实验结果表明，ZnO的加入对铝在4 M KOH-甲醇-水溶液中的腐蚀有明显的抑制作用，在含羟色胺（HT）的KOH溶液中，其缓蚀效果得到增强。扫描电子显微镜（SEM）和X射线能谱分析（EDAX）结果表明，ZnO是通过在铝表面形成含锌存款层而起缓蚀作用的，ZnO与HT的协同作用可促进锌的存款沉积。恒电流放电结果表明，在含有0.2M ZnO和1.0mL/LHT的4 M KOH-甲醇-水溶液中，铝具有良好的电化学活性。
The corrosion and electrochemical behavior of aluminum in inhibited and uninhibited 4 M KOH-methanol-water mixed solutions with a methanol/water volume ratio of 3:2 were investigated by means of hydrogen collection, polarization curve, galvanostatic discharge, and electrochemical impedance spectroscopy (EIS). The results of hydrogen collection and electrochemical experiments showed that the addition of ZnO can obviously inhibit the corrosion of aluminum in the 4 M KOH-methanol-water solutions, and its inhibition effect can be enhanced in the hydroxy-tryptamine (HT)-containing KOH solution. The results of scanning electron microscopy (SEM) and energy dispersive analysis of X-ray (EDAX) revealed that ZnO produces the inhibition effect by the formation of a zinc-containing deposit layer on the surface of aluminum, and the cooperative effect of ZnO and HT may improve the deposit of zinc. The results of galvanostatic discharge indicated that aluminum can present good electrochemical activity in the 4 M KOH-methanol-water solution with 0.2 M ZnO and 1.0 mL/L HT.