Titanium dioxide (tio2) sol gel coating on 316l stainless steel

Abdul Aziz, Norhaslina (2014) Titanium dioxide (tio2) sol gel coating on 316l stainless steel. Masters thesis, Universiti Tun Hussein Onn Malaysia.

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Abstract

The work presented in this thesis deals with experimental and theoretical studies related to titanium dioxide (TiO2) thin films. The main purpose of this research is to prepare the TiO2 sol gel coating on 316L stainless steel with the effect of withdrawal speed and heat treatment. The whole project is emphasis on composition of TiO2 coating on 316L stainless steel and how it affected by the different withdrawal speed and heat treatment temperature. The parameters used in this study are calcination temperature (300°C, 500°C and 700°C) and withdrawal speed (6mm/min, 30mm/min and 60mm/min). The coatings were obtained by the sol-gel method. Titanium (IV) butoxide was used as a TiO2 precursor in the sol gel process. Stainless steel 316L was coated with dip coating method. In this experiment, the characteristics of the TiO2 sol-gel coating on 316L stainless steel were investigated using Fourier transform infrared spectroscopy (FTIR) for structural/bonding determination, X-ray diffraction (XRD) for phase determination and Scanning electron microscopy (SEM) for morphology of the sample. Then, corrosion behavior of the sample was obtained by electrochemistry test. The coating was examined in 3.5% NaCl at room temperature (25±0.2°C). In the solution examined, anatase crystallite exist at calcined temperature 500°C while rutile crystallite at 700°C. The value of corrosion rate increased as the calcined temperature increased and the best protective properties exhibit at 300°C and withdrawal speed 60 mm/min. The result shows that as calcined temperature increased, the corrosion rate increased and the corrosion current density decreased gradually. Other than that, as the withdrawal speed increased, the films particles become more compact and also the grain size become more distinct.

Item Type:Thesis (Masters)
Subjects:Q Science > QD Chemistry
ID Code:7814
Deposited By:Mrs Hasliza Hamdan
Deposited On:27 Apr 2016 14:56
Last Modified:27 Apr 2016 14:56

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