V-5Cr-5Ti合金在Cl-溶液中的界面腐蚀特性

采用电化学阻抗谱测试技术、光学显微镜、扫描电镜及X射线能谱研究了V-5Cr-5Ti合金在Cl^-溶液中的界面腐蚀特性，并与钒进行了比较。结果表明，在50 μg/g Cl^-的KCl溶液中，V与V-5Cr-5Ti合金的电化学阻抗谱均具有容抗弧特性，其界面腐蚀物理结构模型可用R₁(Q₁(R₂(Q₂R₃)))等效电路表示，V的腐蚀电极过程电荷转移电阻远大于V-5Cr-5Ti合金；V的腐蚀为均匀腐蚀，而V-5Cr-5Ti合金为局部腐蚀；V的抗腐蚀性能优于V-5Cr-5Ti合金。

Interface Corrosion Characteristics of V-5Cr-5Ti Alloy in Cl - Solution

Interface corrosion characteristics of V-5Cr-5Ti alloy in chloride solution were studied by electrochemical impedance spectroscopy (EIS), optical microscope, scanning electron microscope (SEM) and X-ray energy dispersive spectroscope (EDS), and compared with that of V. The results indicate that in 50 μg/g Cl^- potassium chloride solution, EIS of V and V-5Cr-5Ti alloy has same capacitance arc characteristic, their interface corrosion physical structure model can be represent as equivalent circuit as R₁(Q₁(R₂(Q₂R₃))). Charge transfer resistance of corrosion electrode process of V is much higher than that of V-5Cr-5Ti alloy. Interface corrosion characteristic of V is homogeneous, but V-5Cr-5Ti alloy is localized. Corrosion resistant performance of V is better than that of V-5Cr-5Ti alloy.