title: sym-Trisubstituted 1,3,5-Triazine Derivatives as Promising Organic Corrosion Inhibitors for Steel in Acidic Solution.
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.
authors.affiliation: Department of Chemistry, College of Science, King Saud University, P. O. Box 2455, Riyadh 11451, Saudi Arabia. aymanel_faham@hotmail.com.|Chemistry Department, Faculty of Science, Alexandria University, P. O. Box 426, Ibrahimia, 12321 Alexandria, Egypt. aymanel_faham@hotmail.com.
authors.forename: Ayman
authors.initials: A
authors.lastname: El-Faham
authors.affiliation: Department of Chemistry, College of Science, King Saud University, P. O. Box 2455, Riyadh 11451, Saudi Arabia. kdahloos@ksu.edu.sa.
authors.forename: Kholood A
authors.initials: KA
authors.lastname: Dahlous
authors.affiliation: Department of Chemistry, College of Science, King Saud University, P. O. Box 2455, Riyadh 11451, Saudi Arabia. zaothman@ksu.edu.sa.|Advanced Materials Research Chair, Department of Chemistry, College of Science, King Saud University, P. O. Box 2455, Riyadh 11451, Saudi Arabia. zaothman@ksu.edu.sa.
authors.forename: Zeid A
authors.initials: ZA
authors.lastname: Al Othman
authors.affiliation: Department of Chemistry, College of Science, King Saud University, P. O. Box 2455, Riyadh 11451, Saudi Arabia. hlohedan@ksu.edu.sa.|Surfactants Research Chair, Department of Chemistry, College of Science, King Saud University, Riyadh 11451, Saudi Arabia. hlohedan@ksu.edu.sa.
authors.forename: Hamad A
authors.initials: HA
authors.lastname: Al-Lohedan
authors.affiliation: Surfactants Research Chair, Department of Chemistry, College of Science, King Saud University, Riyadh 11451, Saudi Arabia. Gamalmah2000@yahoo.com.|Chemistry Department, Faculty of Science, Helwan University, Helwan 11795, Egypt. Gamalmah2000@yahoo.com.
authors.forename: Gamal A
authors.initials: GA
authors.lastname: El-Mahdy
mesh_terms: D003343:Corrosion; D004563:Electrochemistry; D006851:Hydrochloric Acid / Q000737:chemistry*; D012996:Solutions / Q000737:chemistry; D013232:Steel / Q000737:chemistry*; D014227:Triazines / Q000737:chemistry*
chemical_list: D012996:Solutions; D014227:Triazines; D013232:Steel; C011907:melamine; D006851:Hydrochloric Acid
keywords: corrosion; organic inhibitors; polarization; steel; trisubstituted-s-triazine