氮掺杂对碳纳米颗粒缓蚀性能的影响

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Effect of Nitrogen Doping on Corrosion Inhibition Performance of Carbon Nanoparticles

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表3 Q235钢在3种溶液中的电化学阻抗谱拟合参数

Table 3 Fitting parameters of EIS of Q235 steel in 1 mol/L HCl solutions without and with 50 mg/L CNPs or N-CNPs

Concentration / mg·L-1 L1 / H Rs / Ω·cm2 Qdl / F·cm-2 n1 Rct / Ω·cm2 L2 / H RL / Ω·cm2 χ2 Inhibition efficiency 1 mol/L HCl 7.934×10-7 1.861 8.095×10-4 0.914 85.2 --- --- 2.87×10-4 --- 50 mg/L CNPs 6.652×10-7 1.731 2.341×10-4 0.902 202.8 139.3 15.95 4.09×10-4 56.5% 50 mg/L N-CNPs 6.409×10-7 1.700 8.974×10-5 0.888 660.3 300.2 30.3 6.43×10-4 87.10%