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A study on the effect of presence of CeO 2 and benzotriazole on activation of self‐healing mechanism in ZrO 2 ceramic‐based coating
Author(s) -
Mersagh Dezfuli Saeid,
Sabzi Masoud
Publication year - 2018
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/ijac.12901
Subject(s) - benzotriazole , materials science , dielectric spectroscopy , corrosion , ceramic , coating , scanning electron microscope , chemical engineering , amorphous solid , composite material , metallurgy , electrochemistry , nuclear chemistry , organic chemistry , electrode , chemistry , engineering
In this study, the effect of presence of CeO 2 and benzotriazole inhibitor agent on activation of self‐healing reactions and the corrosion behavior of ZrO 2 ceramic‐based coating are evaluated. The ZrO 2 and ZrO 2 ‐CeO 2 ‐benzotriazole ceramic‐based coatings were synthesized using sol–gel process and heat treated at 150°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 3.5 wt% 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 ZrO 2 ‐CeO 2 ‐benzotriazole ceramic‐based coating. Moreover, results of electrochemical tests revealed that the presence of CeO 2 and benzotriazole inhibitor agent in the ZrO 2 ceramic‐based coating results in intense increases in the corrosion resistance of this coating by activating the self‐healing mechanism and forming passive layers.