【摘要】 利用动电位极化曲线、电化学阻抗谱图(EIS)和Mott-Schottky分析等电化学测试手段,探讨了Fe-10Cr纳米涂层在0.05 mol/L H2SO4+0.5 mol/L NaC l溶液中的腐蚀行为.研究表明,与铸态合金相比,溅射纳米涂层表面钝化膜的化学稳定性和再钝化性能明显提高;二者的钝化膜均具有p型半导体结构特征,但溅射纳米涂层表面钝化膜的载流子密度和平带电位都比较低,导致钝化膜中金属离子的传输速度较低,纳米涂层表面钝化膜的化学稳定性增强.更多还原

【Abstract】 The corrosion behavior of Fe-10Cr sputtering coating with nanoscale grain size was investigated in 0.05 mol/L H2SO4+0.5 mol/L NaCl aqueous solution using polarization curves,EIS and Mott-Schottky analysis.The results indicated that the chemical stability and repassive ability of passive film formed on Fe-10Cr nc coating was apparently improved.The passive films on both Fe-10Cr nc coating and cast alloy have p-type semiconducting behavior.The lower acceptor density and flat-band potential of the passive film in comparison with Fe-10Cr cast alloy lead to the high chemical stability and repassive ability for the passive film on the sputtering coating.更多还原