有机胺对LY12Al合金的缓蚀作用及对腐蚀疲劳寿命的影响

INFLUENCE OF ORGANIC AMINES ON CORROSION INHIBITION AND CF LIFE OF ALUMINOM ALLOY LY12

应用电化学极化曲线、扫描电镜 (SEM)和腐蚀疲劳实验研究了有机胺对Al合金在 3.5 %NaCl介质中的缓蚀作用和对腐蚀疲劳寿命的影响 .结果表明 ,有机胺对Al合金在NaCl溶液中具有较好的缓蚀作用 ,并在一定程度上抑制了Al合金点蚀的发生 ;有机胺提高了Al合金在NaCl溶液中的腐蚀疲劳寿命 。

The inhibition effect of organic amines on LY12 aluminum alloy in 3.5%NaCl solution was studied by experiments with electrochemical method,scanning electronic microscopy (SEM) and corrosion fatigue.The experimental results showed that the organic amines had a good inhibitive efficiency and inhibited the pitting corrosion of the alloy to some extent. The CF experiments showed that the organic amines increased the CF life of aluminum alloy in 3.5%NaCl solution.Furthermore,iso-propylamine is even better than benzylamine in increasing CF lifetime of LY12.