Hydrazino-methoxy-1,3,5-triazine Derivatives' Excellent Corrosion Organic Inhibitors of Steel in Acidic Chloride Solution.
The corrosion inhibition performance of 2-hydrazino-4,6-dimethoxy-1,3,5-tirazine (DMeHT), 2,4-dihydrazino-6-methoxy-1,3,5-triaizine (DHMeT), and 2,4,6-tridydrazino-1,3,5-triaizne (TH₃) on steel corrosion in acidic media was examined using electrochemical techniques. The results showed 2,4-Ddihydrazino-6-methoxy-1,3,5-triaizine (DHMeT) gave the best corrosion protection performance among the other hydrazino derivatives even at a low concentration of 25 ppm (95%). The number of hydrazino groups play an important role in the corrosion inhibition, where the two hydrazine groups increased the electrostatic interactions between the protonated tested compounds, the negatively charged steel surface resulted from the adsorption of the chloride anions, and the presence of the methoxy group made the compound more reliable for formation of film protection on the surface of steel through the lone pair of oxygen atoms. Electrochemical Impedance Spectroscopy (EIS) measurements suggested that the corrosion process of steel in presence of the hydrazino-s-triazine derivatives (TH₃, DMeHT and DHMeT) were being controlled by the charge transfer reaction. Polarization curves indicated that the examined TH₃, DMeHT and DHMeT behaved as mixed type inhibitors.
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, Alexandria 12321, Egypt. aymanel_faham@hotmail.com.
Ayman
A
El-Faham
Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia. smahmoud@ksu.edu.sa.|Advanced Materials Research Chair, Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia. smahmoud@ksu.edu.sa.
Sameh M
SM
Osman
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.
Hamad A
HA
Al-Lohedan
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.
Gamal A
GA
El-Mahdy
D000327:Adsorption; D003343:Corrosion; D006851:Hydrochloric Acid / Q000737:chemistry*; D012996:Solutions; D013232:Steel / Q000737:chemistry*; D014227:Triazines / Q000138:chemical synthesis / Q000737:chemistry*
D012996:Solutions; D014227:Triazines; D013232:Steel; D006851:Hydrochloric Acid
EIS; adsorption; hydrazine derivatives; organic corrosion inhibitor; polarization; s-triazine; steel