Corrosion behavior of coating with plasma sprayed 8YSZ on the surface of carbon steel
来源期刊:JOURNAL OF RARE EARTHS2012年第6期
论文作者:刘扬佳 范习之 曾水冰 王盈 邹兵林 古立建 陈小龙 Zuhair Subhani Khan 杨道武 曹学强
文章页码:592 - 598
摘 要:The corrosion behavior of plasma sprayed 8YSZ(ZrO2 stabilized by 8 wt.%Y2O3)coating on the surface of carbon steel in seawater was investigated.The electrochemical impedance spectroscopy was used as a non-destructive evaluation technique to monitor the protection properties of the coating when it was immersed in seawater,and corrosion products were characterized by scanning electron microscopy,energy dispersive spectrometry and X-ray photoelectron spectroscopy.The results indicated that three time constants were obtained during the initial immersion period,and then a new time constant appeared due to the formation of rust layer,which was corresponding to the corrosion process.Corrosion products were formed on the coating surface as well as inside the coating,and the crystalline composition of the rust layer mainly consisted of γ-FeOOH.
刘扬佳1,范习之1,曾水冰1,王盈2,邹兵林2,古立建2,陈小龙2,Zuhair Subhani Khan2,杨道武1,曹学强1,2
1. Department of Chemical and Biological Engineering,Changsha University of Science and Technology2. State Key Laboratory of Rare Earth Resources Utilization,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences
摘 要:The corrosion behavior of plasma sprayed 8YSZ(ZrO2 stabilized by 8 wt.%Y2O3)coating on the surface of carbon steel in seawater was investigated.The electrochemical impedance spectroscopy was used as a non-destructive evaluation technique to monitor the protection properties of the coating when it was immersed in seawater,and corrosion products were characterized by scanning electron microscopy,energy dispersive spectrometry and X-ray photoelectron spectroscopy.The results indicated that three time constants were obtained during the initial immersion period,and then a new time constant appeared due to the formation of rust layer,which was corresponding to the corrosion process.Corrosion products were formed on the coating surface as well as inside the coating,and the crystalline composition of the rust layer mainly consisted of γ-FeOOH.
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