Corrosion behavior of coating with plasma sprayed 8YSZ on the surface of carbon steel

• Published in: Journal of rare earths Vol. 30; no. 6; pp. 592 - 598
• Main Author: 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
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.06.2012
• Subjects: 8YSZ; carbon steel; Carbon steels; Coating; Corrosion; corrosion behavior; Corrosion prevention; Corrosion products; electrochemical impedance spectroscopy; Rare earth metals; rare earths; Rusting; thermal barrier coating; Time constant; X射线光电子能谱; 喷涂涂层; 电化学阻抗谱; 碳钢表面; 等离子; 腐蚀行为; 非破坏性评估; thermal barrier coating; corrosion behavior; electrochemical impedance spectroscopy; carbon steel; rare earths
• ISSN: 1002-0721; 2509-4963
• DOI: 10.1016/S1002-0721(12)60096-9

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 dur ing 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.