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Article

Anti-Corrosion Behavior of Olmesartan for Soft-Cast Steel in 1 mol dm−3 HCl

by 1, 2, 3,*, 4 and 5
1
Department of Chemistry, College of Engineering & Technology, Srinivas University, Mukka, Mangalore 574146, India
2
Department of Chemistry, College of Science, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia
3
Department of Chemistry, Jain Institute Technology, Davanagere 577003, India
4
Department of Chemistry, Sri Darmasthala Manjunatheshwara College (Autonomous), Ujire 574240, India
5
School of Engineering, Robert Gordon University, Aberdeen AB10 1FR, UK
*
Author to whom correspondence should be addressed.
Academic Editor: Tao-Hsing Chen
Coatings 2021, 11(8), 965; https://doi.org/10.3390/coatings11080965
Received: 10 July 2021 / Revised: 8 August 2021 / Accepted: 10 August 2021 / Published: 13 August 2021
(This article belongs to the Topic Multiple Application for Novel and Advanced Materials)
This study discusses the effects of temperature on corrosion inhibition for soft-cast steel by the pharmaceutically active drug olmesartan in 1 mol dm−3 HCl. The sufficient number of electron-rich elements and non-bonding π electrons in its structure favored a good capability for coating onto the electron-deficient steel surfaces. Theoretical and electrochemical measurements were carried out at the temperature region of 303 K to 333 K. Therefore, the experiment suggests that the inhibition efficiency of olmesartan increases with its increasing concentrations due to the adsorption. Additionally, even at a higher temperature of 333 K, the inhibitor molecules attain their stability towards corrosion resistance of steel surfaces. The adsorption of inhibitors on steel surfaces is spontaneously found to include the mixture of physisorption and chemisorption, and it obeys Temkin’s adsorption isotherm model. Theoretical and computational considerations were made using quantum chemical parameters and molecular dynamics simulations, which confirmed that the olmesartan has a suitable corrosion inhibitive capability intended for soft-cast steel in 1 mol dm−3 HCl. Additionally, scanning electron microscopic measurement was used to obtain a visual idea of the inhibitive action of the inhibitor attained by forming an adsorbed protective layer onto the steel surfaces. The minute concentration of olmesartan of about 10–50 ppm shows high inhibition efficiency of ~80%, even at elevated temperatures. View Full-Text
Keywords: soft-cast steel; electrochemical; SEM; adsorption; molecular dynamic simulation soft-cast steel; electrochemical; SEM; adsorption; molecular dynamic simulation
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MDPI and ACS Style

Praveen, B.M.; Alhadhrami, A.; Prasanna, B.M.; Hebbar, N.; Prabhu, R. Anti-Corrosion Behavior of Olmesartan for Soft-Cast Steel in 1 mol dm−3 HCl. Coatings 2021, 11, 965. https://doi.org/10.3390/coatings11080965

AMA Style

Praveen BM, Alhadhrami A, Prasanna BM, Hebbar N, Prabhu R. Anti-Corrosion Behavior of Olmesartan for Soft-Cast Steel in 1 mol dm−3 HCl. Coatings. 2021; 11(8):965. https://doi.org/10.3390/coatings11080965

Chicago/Turabian Style

Praveen, B. M., A. Alhadhrami, B. M. Prasanna, Narayana Hebbar, and Radhakrishna Prabhu. 2021. "Anti-Corrosion Behavior of Olmesartan for Soft-Cast Steel in 1 mol dm−3 HCl" Coatings 11, no. 8: 965. https://doi.org/10.3390/coatings11080965

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