V-5Cr-5Ti合金在Cl^-溶液中的界面腐蚀特性  

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

作　　者：王庆富[1] 鲜晓斌[1] 郎定木[1] 王晓红[1] 冷邦义[1] 

机构地区：[1]中国工程物理研究院,四川绵阳621900

出　　处：《原子能科学技术》2013年第10期1680-1684,共5页Atomic Energy Science and Technology

基　　金：中国工程物理研究院科学技术发展基金资助项目(2010A0301014)

摘　　要：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50μg/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 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 （Q2 R3 ））） .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 .

关 键 词：V-5Cr-5Ti合金 电化学阻抗谱 等效电路 界面腐蚀 

分 类 号：TG172.5[金属学及工艺—金属表面处理]