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Molecules 2016, 21(4), 436; doi:10.3390/molecules21040436

sym-Trisubstituted 1,3,5-Triazine Derivatives as Promising Organic Corrosion Inhibitors for Steel in Acidic Solution

1
Department of Chemistry, College of Science, King Saud University, P. O. Box 2455, Riyadh 11451, Saudi Arabia
2
Chemistry Department, Faculty of Science, Alexandria University, P. O. Box 426, Ibrahimia, 12321 Alexandria, Egypt
3
Advanced Materials Research Chair, Department of Chemistry, College of Science, King Saud University, P. O. Box 2455, Riyadh 11451, Saudi Arabia
4
Surfactants Research Chair, Department of Chemistry, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
5
Chemistry Department, Faculty of Science, Helwan University, Helwan 11795, Egypt
*
Authors to whom correspondence should be addressed.
Academic Editor: Derek J. McPhee
Received: 20 February 2016 / Revised: 25 March 2016 / Accepted: 28 March 2016 / Published: 31 March 2016
(This article belongs to the Section Organic Synthesis)
View Full-Text   |   Download PDF [2394 KB, uploaded 31 March 2016]   |  

Abstract

Triazine derivatives, namely, 2,4,6-tris(quinolin-8-yloxy)-1,3,5-triazine (T3Q), N2,N4,N6-tris(pyridin-2-ylmethyl)-1,3,5-triazine-2,4,6-triamine (T3AMPy) and 2,2′,2′′-[(1,3,5-triazine-2,4,6-triyl)tris(azanediyl)] tris(ethan-1-ol) (T3EA) were synthesized and their inhibition of steel corrosion in hydrochloric acid solution was investigated using electrochemical techniques. The corrosion protection of the prepared compounds increased with increasing concentration and reached up to 98% at 250 ppm. The adsorption of T3Q, T3AMPy, and T3EA on the steel surface was in accordance with the Langmuir adsorption isotherm. The electrochemical results revealed that T3Q, T3AMPy and T3EA act as excellent organic inhibitors and can labeled as mixed type inhibitors. The efficiencies of the tested compounds were affected by the nature of the side chain present in the triazine ring, where T3EA gave the least inhibition while T3Q and T3AMPy gave higher and almost the same inhibition effects. The inhibition efficiencies obtained from the different electrochemical techniques were in good agreement. View Full-Text
Keywords: trisubstituted-s-triazine; organic inhibitors; corrosion; steel; polarization trisubstituted-s-triazine; organic inhibitors; corrosion; steel; polarization
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MDPI and ACS Style

El-Faham, A.; Dahlous, K.A.; AL Othman, Z.A.; Al-Lohedan, H.A.; El-Mahdy, G.A. sym-Trisubstituted 1,3,5-Triazine Derivatives as Promising Organic Corrosion Inhibitors for Steel in Acidic Solution. Molecules 2016, 21, 436.

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