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Morphology evaluation of ZrO2 dip coating on mild steel and its corrosion performance in NaOH solution.pdf Available under License Creative Commons Attribution. Download (470kB) | Preview |
Abstract
In this work, the morphology of ZrO2 thin film from dip coating process on mild steel has been investigated. Mild steel was dip-coated on solution made of zirconium butoxide as a precursor, ethanol as solvent, acetylacetone as chelating agent and water for hydrolysis. Number of dipping was adjusted at 3, 5 and 7 times. The dipped sample then annealed at 350°C for two hours by adjusting the heating rate at 1°C/min respectively. The optical microscope showed that micro-cracks were observed on the surface of the coating with its concentration reduced as dipping sequence increased. The XRD result showed that annealing process can produce polycrystalline tetragonal-ZrO2. Meanwhile, SEM image showed that the thicknesses of the ZrO2 coatings were in between 400-600 nm. The corrosion resistance of uncoated and coated substrates was studied by polarization test through potentio-dynamic polarization curve at 1mV/s immersed in with 3.5% NaCl. The coating efficiency was improved as the number of layer dip coated increased, which showed improvement in corrosion protection.
| Item Type: | Conference or Workshop Item (Lecture) |
|---|---|
| Uncontrolled Keywords: | morphology; ZrO2; dip coating; corrosion; NaOH |
| Subjects: | Q Science > Q Science (General) T Technology > TJ Mechanical engineering and machinery |
| Faculty/Division: | Faculty of Mechanical Engineering |
| Depositing User: | Dr. Wan Sharuzi Wan Harun |
| Date Deposited: | 26 Dec 2017 08:02 |
| Last Modified: | 11 Apr 2018 03:00 |
| URI: | http://umpir.ump.edu.my/id/eprint/19654 |
| Download Statistic: | View Download Statistics |
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