Studies on Chemical Resistance of Sol-Gel Derived TiO2-Fe2O3 Thin Film Coatings on Glazed Ceramic Wall Tiles

TLDR: In this paper, the authors reported improvement in chemical resistance of glazed wall tile by solgel derived TiO2-Fe2O3 thin film coatings on the glazed surface.

Abstract: Present study reports improvement in chemical resistance of glazed wall tile by solgel derived TiO2-Fe2O3 thin film coatings on the glazed surface. Effect of firing temperature on the chemical resistance of the coating was estimated after firing at different temperatures (600°, 700° and 800°C). The chemical durability of the coated substrate in comparison to the uncoated was tested against acidic attack by immersing them in 3% (v/v) hydrochloric acid solution and 10 wt% citric acid solution and basic attack by immersing them in 20 wt% potassium hydroxide solution in accordance with IS: 13630 (Part 8): 2006 standard. Further, the coated surface was also tested against basic attack in 1 N sodium hydroxide and 2.5 wt% detergent solution for seven days. The chemical durability was quantitatively estimated by measuring gloss at the surface at regular time intervals. Acid resistance was found to be good for coated substrate fired at all test temperatures. The coated substrate fired at 800°C showed high ...