Morphology Evaluation of ZrO2 Dip Coating on Mild Steel and its Corrosion Performance in NaOH Solution

M. A., Anwar and Kurniawan, Tedi and Asmara, Y. P. and W. S., Wan Harun and Oumar, A. N. and Nandyanto, A. B. D. (2017) Morphology Evaluation of ZrO2 Dip Coating on Mild Steel and its Corrosion Performance in NaOH Solution. In: IOP Conference Series: Materials Science and Engineering, 4th International Conference on Mechanical Engineering Research (ICMER2017) , 1-2 August 2017 , Kuantan, Pahang, Malaysia. pp. 1-6., 257 (012087). ISSN 1757-899X

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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
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