Corrosion behavior of 907 steel under thin electrolyte layers of artificial seawater  

作　　者：王慧萍 丁少春 朱娟 张昭 张鉴清 曹楚南 

机构地区：[1]Department of Chemistry, Zhejiang University [2]Scientific Research Office, Naval University of Engineering [3]State Key Laboratory for Corrosion and Protection of Metals

出　　处：《Journal of Central South University》2015年第3期806-814,共9页中南大学学报（英文版）

基　　金：Projects(21073162,21273199) supported by the National Natural Science Foundation of China;Project(GCTKF2012013) supported by the Science and Technology Bureau of Jiaxing Municipality and the State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology,China

摘　　要：The corrosion behavior of 907 steel under thin electrolyte layer(TEL) has been investigated by means of cathodic polarization curve measurement, electrochemical impedance spectroscopy(EIS) and scanning electron microscopy(SEM). The results show that the cathodic diffusion current density presents the variation trend of initial increase and subsequent decrease with the decrease of TEL thickness, and the maximum deposits at 58 μm. The cotangent-hyperbolic impedance(O) is rationally first introduced to study the diffusion process of the reactants through the corrosion products layer with many permeable holes. The initial corrosion rate of 907 steel under different TEL thickness increases with the decrease of TEL thickness except that of 104 μm,whereas the corrosion rate after long time corrosion can be ranked as 104 μm﹥402 μm﹥198 μm﹥301 μm﹥bulk solution.The corrosion behavior of 907 steel under thin electrolyte layer（TEL） has been investigated by means of cathodic polarization curve measurement, electrochemical impedance spectroscopy（EIS） and scanning electron microscopy（SEM）. The results show that the cathodic diffusion current density presents the variation trend of initial increase and subsequent decrease with the decrease of TEL thickness, and the maximum deposits at 58 μm. The cotangent-hyperbolic impedance（O） is rationally first introduced to study the diffusion process of the reactants through the corrosion products layer with many permeable holes. The initial corrosion rate of 907 steel under different TEL thickness increases with the decrease of TEL thickness except that of 104 μm,whereas the corrosion rate after long time corrosion can be ranked as 104 μm﹥402 μm﹥198 μm﹥301 μm﹥bulk solution.

关 键 词：907 steel atmospheric corrosion electrochemical impedance spectroscopy polarization 

分 类 号：TG172[金属学及工艺—金属表面处理] TG142.1[金属学及工艺—金属学]