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ANTI-CORROSION PERFORMANCE OF 1,3-BENZOTHIAZOLE ON 410 MARTENSITIC STAINLESS STEEL IN H₂SO₄

ROLAND TOLULOPE LOTO

Department of Mechanical Engineering, Covenant University, Ota, Ogun State, Nigeria

https://doi.org/10.1142/S0218625X17501219Cited by:11 (Source: Crossref)

Abstract

The corrosion inhibition effect of synthesized 1,3-benzothiazole at very low concentrations on 410 martensitic stainless steel in 3MH₂SO₄ solution was studied through potentiodynamic polarization and weight loss measurements. The observation showed that the organic compound performed effectively with average inhibition efficiencies of 94% and 98% at the concentrations studied from both electrochemical methods due to the inhibition action of protonated inhibitor molecules in the acid solution. The amine and aromatics functional groups of the molecules active in the corrosion inhibition reaction were exposed from Attenuated total reflectance-Fourier transform infrared spectroscopy (ATR-FTIR) spectroscopic analysis. Thermodynamic calculations showed cationic adsorption to be chemisorption adsorption, obeying the Langmuir adsorption isotherm. Images from optical microscopy showed an improved morphology in comparison to images from corroded stainless steel. Severe surface deterioration and macro-pits were observed in the uninhibited samples.

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Vol. 24, No. 07

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History

Received 14 March 2017

Revised 30 May 2017

Accepted 16 June 2017

Published: 21 July 2017

Information

This is an Open Access article published by World Scientific Publishing Company. It is distributed under the terms of the Creative Commons Attribution 4.0 (CC-BY) License. Further distribution of this work is permitted, provided the original work is properly cited.

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