A study on the effect of presence of CeO2 and benzotriazole on activation of self-healing mechanism in ZrO2 ceramic-based coating

作者：Dezfuli Saeid Mersagh; Sabzi Masoud^*

来源：International Journal of Applied Ceramic Technology, 2018, 15(5): 1248-1260.

DOI：10.1111/ijac.12901

• activation of self-healing mechanism
• corrosion resistance
• inhibitor agent
• sol-gel
• ZrO2 ceramic-based coating

In this study, the effect of presence of CeO2 and benzotriazole inhibitor agent on activation of self-healing reactions and the corrosion behavior of ZrO2 ceramic-based coating are evaluated. The ZrO2 and ZrO2-CeO2-benzotriazole ceramic-based coatings were synthesized using sol-gel process and heat treated at 150 degrees C. Afterward, X-ray diffraction analysis (XRD), and Field Emission Scanning Electron Microscopy (FE-SEM) were utilized to evaluate the phase analysis and morphology of these coatings. In addition, Energy Dispersive Spectroscopy (EDS) was used for elemental analysis of obtained coatings. Corrosion and self-healing behavior of the coatings were investigated in 3.5wt% NaCl solution using Electrochemical Impedance Spectroscopy (EIS) and potentiodynamic polarization tests. The results of XRD analysis revealed the amorphous nature of both coatings. FE-SEM observations and EDS analysis results showed the presence of benzotriazole inhibitor agent and self-healing reactions in the cracks and defects of ZrO2-CeO2-benzotriazole ceramic-based coating. Moreover, results of electrochemical tests revealed that the presence of CeO2 and benzotriazole inhibitor agent in the ZrO2 ceramic-based coating results in intense increases in the corrosion resistance of this coating by activating the self-healing mechanism and forming passive layers.

• 出版日期2018-10