咪唑啉缓蚀剂在NaCl溶液中对2099Al-Li合金的缓蚀行为

Inhibiting action of imidazoline on the corrosion of 2099 Al-Li alloy in NaCl solution

摘要: 采用极化曲线、交流电化学阻抗谱（EIS）和扫描电化学显微镜（SECM）技术研究了咪唑啉在3 %（指质量分数，下同）NaCl溶液中对2099 Al-Li合金的缓蚀行为.结果表明:咪唑啉有很好的缓蚀效果.极化曲线测试和交流阻抗测试都验证了咪唑啉浓度达到0.01 mmol/L时，缓蚀效率达77 %以上的准确性.采用扫描电化学显微镜技术（SECM）研究0.01 mmol/L咪唑啉缓蚀剂在3 % NaCl+5 mmol/LKI溶液中对2099铝锂合金的缓蚀行为.结果表明：在缓蚀剂条件下，合金表面电流峰数量减少，强度减弱.

Abstract: The inhibiting action of imidazoline on corrosion of 2099 Al-Li alloy in 3 % It referstothe mass fraction NaCl solution was investigated by polarization curve, electrochemical impedance spectroscopy (EIS) and scanning electron microscopy (SECM). The results showed that imidazoline had a good corrosion inhibition effect. When the concentration of imidazoline reached 0.01 mmol/L, the inhibition efficiency was above 77 %. Both polarization and AC impedance tests verified this effect. The inhibiting action of 0.01 mmol/L inhibitor on 2099 Al-Li alloy in 3 % NaCl+5 mmol/L KI solution was investigated by scanning electrochemical microscopy (SECM). The results indicated that under the effect of corrosion inhibitor, both the current peaks and strength of alloy decreased.