A corrosion study: Use of Thionine dye having structurally metachromatic influence

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International Journal of Chemistry and Technology
Volume:3 Issue:1
A corrosion study: Use of Thionine dye having structurally metachromatic influence

A corrosion study: Use of Thionine dye having structurally metachromatic influence

Pages : 17-25

View : 37 | Download : 15

Publication Date : 2019-06-28

Article Type : Research Paper

Abstract :In the present study, it was examined the inhibition performance of Thionine, which has metachromatic properties and is generally used as a vital dye for different staining of nucleus and cytoplasm, on mild steel in acidic medium as a different application area which is not existed in the literature. In order to understand how Thionine interacts with the mild steel surface, different types of adsorption isotherms were plotted and it was seen obeyed the Langmuir isotherm. The test results revealed that as the inhibitor concentration increased at each temperature, the corrosion current density insert ignore into journalissuearticles values( i corr ); values diminished and accordingly, the inhibition efficiencies insert ignore into journalissuearticles values( η%); increased slightly. The results indicated that the Thionine molecules continued to be adsorbed onto the metal surface to some extent, even when elevated to high temperatures. Thermodynamic adsorption parameters revealed a strong and chemical interaction between Thionine and mild steel. It was determined that the Thionine acted as a mixed-type inhibitor on the mild steel surface. Finally, field emission scanning electron insert ignore into journalissuearticles values(FESEM); and atomic force microscopy insert ignore into journalissuearticles values(AFM); analyses were performed to determine the surface characteristics.
Keywords : Thionine, adsorption, acidic corrosion, FESEM

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