Effect of Water/Alkoxide Molar Ratio on the Synthesis Process and Electrochemical Behavior of Yttria-doped Zirconia Sol-gel Films
The aim of this work is to synthesize and investigate the performance of yttria-doped zirconia solgel coatings in the chemical corrosion prevention of zircaloy-4 (zirconium alloy) in a 1 N H2SO4 environment. The influence of four different molar ratios of water to alkoxide, namely 1, 4, 12, and 20,...
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| Format: | Article |
| Language: | English |
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Petroleum University of Technology
2013-01-01
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| Series: | Iranian Journal of Oil & Gas Science and Technology |
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| Online Access: | http://ijogst.put.ac.ir/article_3038_f3e4d6109ce56f344014943f8708b0a1.pdf |
| _version_ | 1818495766759473152 |
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| author | Samaneh Rezaee Gholamreza Rashed Mohammad Ali Golozar |
| author_facet | Samaneh Rezaee Gholamreza Rashed Mohammad Ali Golozar |
| author_sort | Samaneh Rezaee |
| collection | DOAJ |
| description | The aim of this work is to synthesize and investigate the performance of yttria-doped zirconia solgel coatings in the chemical corrosion prevention of zircaloy-4 (zirconium alloy) in a 1 N H2SO4 environment. The influence of four different molar ratios of water to alkoxide, namely 1, 4, 12, and 20, on the coating quality and its corrosion prevention performance was investigated. Differential thermal analysis and thermogravimetric analysis (DTA-TG) revealed the coating formation process. Surface morphology was examined using scanning electron microscopy (SEM). Microscopic features were obtained by employing energy dispersive spectroscopy (EDX) and X-ray diffraction (XRD). Wet corrosion performance was evaluated by using potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) techniques. The EDX results approved that the amount of the yttria doped in zirconia was about 8 wt.%. The XRD results showed that the crystallization of zirconia started near 400 °C. The SEM results showed that denser cracks were formed at a water/alkoxide molar ratio of 4. The electrochemical tests revealed that, as the molar ratio of water to alkoxide was increased beyond 4, the coating quality was damaged and the best protection performance was achieved at a water/alkoxide molar ratio of 4. |
| first_indexed | 2024-12-10T18:25:05Z |
| format | Article |
| id | doaj.art-c6b5c22c8f2849e1ba2c09ef33db86e8 |
| institution | Directory Open Access Journal |
| issn | 2345-2412 2345-2420 |
| language | English |
| last_indexed | 2024-12-10T18:25:05Z |
| publishDate | 2013-01-01 |
| publisher | Petroleum University of Technology |
| record_format | Article |
| series | Iranian Journal of Oil & Gas Science and Technology |
| spelling | doaj.art-c6b5c22c8f2849e1ba2c09ef33db86e82022-12-22T01:38:06ZengPetroleum University of TechnologyIranian Journal of Oil & Gas Science and Technology2345-24122345-24202013-01-0121577010.22050/ijogst.2013.30383038Effect of Water/Alkoxide Molar Ratio on the Synthesis Process and Electrochemical Behavior of Yttria-doped Zirconia Sol-gel FilmsSamaneh Rezaee0Gholamreza Rashed1Mohammad Ali Golozar2Department of Technical Inspection Engineering, Petroleum University of Technology, Abadan, IranDepartment of Technical Inspection Engineering, Petroleum University of Technology, Abadan, IranDepartment of Material Science Engineering, Isfahan University of Technology, Isfahan, IranThe aim of this work is to synthesize and investigate the performance of yttria-doped zirconia solgel coatings in the chemical corrosion prevention of zircaloy-4 (zirconium alloy) in a 1 N H2SO4 environment. The influence of four different molar ratios of water to alkoxide, namely 1, 4, 12, and 20, on the coating quality and its corrosion prevention performance was investigated. Differential thermal analysis and thermogravimetric analysis (DTA-TG) revealed the coating formation process. Surface morphology was examined using scanning electron microscopy (SEM). Microscopic features were obtained by employing energy dispersive spectroscopy (EDX) and X-ray diffraction (XRD). Wet corrosion performance was evaluated by using potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) techniques. The EDX results approved that the amount of the yttria doped in zirconia was about 8 wt.%. The XRD results showed that the crystallization of zirconia started near 400 °C. The SEM results showed that denser cracks were formed at a water/alkoxide molar ratio of 4. The electrochemical tests revealed that, as the molar ratio of water to alkoxide was increased beyond 4, the coating quality was damaged and the best protection performance was achieved at a water/alkoxide molar ratio of 4.http://ijogst.put.ac.ir/article_3038_f3e4d6109ce56f344014943f8708b0a1.pdfSol-gelYttria-stabilized Zirconia (YSZ) CoatingHydrolysisCrack-free CoatingCorrosion PerformanceYttria-doped Zirconia Coating |
| spellingShingle | Samaneh Rezaee Gholamreza Rashed Mohammad Ali Golozar Effect of Water/Alkoxide Molar Ratio on the Synthesis Process and Electrochemical Behavior of Yttria-doped Zirconia Sol-gel Films Iranian Journal of Oil & Gas Science and Technology Sol-gel Yttria-stabilized Zirconia (YSZ) Coating Hydrolysis Crack-free Coating Corrosion Performance Yttria-doped Zirconia Coating |
| title | Effect of Water/Alkoxide Molar Ratio on the Synthesis Process and
Electrochemical Behavior of Yttria-doped Zirconia Sol-gel Films |
| title_full | Effect of Water/Alkoxide Molar Ratio on the Synthesis Process and
Electrochemical Behavior of Yttria-doped Zirconia Sol-gel Films |
| title_fullStr | Effect of Water/Alkoxide Molar Ratio on the Synthesis Process and
Electrochemical Behavior of Yttria-doped Zirconia Sol-gel Films |
| title_full_unstemmed | Effect of Water/Alkoxide Molar Ratio on the Synthesis Process and
Electrochemical Behavior of Yttria-doped Zirconia Sol-gel Films |
| title_short | Effect of Water/Alkoxide Molar Ratio on the Synthesis Process and
Electrochemical Behavior of Yttria-doped Zirconia Sol-gel Films |
| title_sort | effect of water alkoxide molar ratio on the synthesis process and electrochemical behavior of yttria doped zirconia sol gel films |
| topic | Sol-gel Yttria-stabilized Zirconia (YSZ) Coating Hydrolysis Crack-free Coating Corrosion Performance Yttria-doped Zirconia Coating |
| url | http://ijogst.put.ac.ir/article_3038_f3e4d6109ce56f344014943f8708b0a1.pdf |
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