带锈铁器在海水介质中腐蚀行为的电化学阻抗研究  

Electrochemical Impedance for Simulated Rusted Cast Iron in Seawater

作　　者：欧阳维真[1] 王蕾[1] 许淳淳[2] 

机构地区：[1]桂林空军学院,广西桂林541003 [2]北京化工大学材料科学与工程学院,北京100029

出　　处：《桂林工学院学报》2008年第3期389-392,共4页Journal of Guilin University of Technology

基　　金：国家“十五”科技攻关项目(2001BA805B01)

摘　　要：采用交流阻抗技术研究了带锈铁器在模拟海水介质中的电化学行为。结果表明,腐蚀产物的存在加速了带锈铁器在海水介质中的腐蚀:随着浸泡时间延长,试样腐蚀速率逐渐增加,交流阻抗谱图在低频段表现为一条直线,直线与x轴的夹角逐渐减小。FTIR分析结果表明:腐蚀产物相主要由β-FeOOH、γ-FeOOH和α-FeOOH相组成。Electrochemical impedance technique is employed to study the corrosion of the simulated rusted cast iron in seawater. Electrochemical impedance results indicate the rusted iron makes severe corrosion in seawater in the presence of porous scale. The impedance spectra show characteristic diffusion in the complex plane. At low frequencies, the complex impedance data traces out straight lines with less slopes with increasing immersion time. Analysis of FTIR indicates the phases of β-FeOOH、γ-FeOOH and α-FeOOH in the rust layer of the sample after immersion.

关 键 词：带锈铁器 交流阻抗技术 Warburg阻抗 

分 类 号：TG174.4[金属学及工艺—金属表面处理]