Preparation of carbon-titania coated stainless steel and its characterization

Abstract

Carbon-titania (C|TiO₂) coated stainless steel (SAE 304) was successfully prepared from the mixture of titanium dioxide powder with commercialized epoxy resin powder with the ratio 20 and 80 wt%. The mixture was coated on stainless steel plate using high voltage spray powder coating. The voltage used for coating was 50kV. The synthesized C|TiO₂ coated stainless steel plate was pyrolyzed under nitrogen atmosphere at 300^oC for an hour using vertical furnace. The synthesized C|TiO₂ was characterized by using Fourier transform infrared spectrometer. The interpretation of Fourier transform infrared spectrometer analysis showed a weak absorption band of C–H sp³at 2970 cm^–1, which correspond to the C–H sp³ bending band at 1257 cm^–1, respectively. Other band found includes C=O, OH and Ti-O stretchs. DR-UV spectrum shows that no band gap at C|TiO₂ coated because the surface of TiO₂ were completely coated by carbon. From FE-SEM imaging, C|TiO₂ coated stainless steel are highly porous and the surface roughness also high then carbon coated stainless steel. From EDX, the compositions of C|TiO₂ coated stainless steel were Carbon 53.6wt%, Oxygen 25.9wt% and Titanium 20.4wt%. Structure of anatase can be determine in C|TiO₂ from the XRD spectrum and the presence of iron nickel compound from stainless steel. The adhesion to stainless steel of C|TiO₂ coated was investigated using method peel adhesion test and there were no C|TiO₂ coating that remove from the stainless steel surface.  From instruments results and the peel adhesion test proved that C|TiO₂ has been coated successfully on the surface of stainless steel. The simplest coating method using high voltage spray powder coating can be used in coating technology and catalysis.