Mohammed H Othman Ahmed, Ahmed A Al-Amiery, Yasmin K Al-Majedy, Abdul Amir H Kadhum, Abu Bakar Mohamad, Tayser Sumer Gaaz
الملخص الانجليزي
The synthesis and characterization of a novel organic corrosion inhibitor (4-(3-mercapto-5,6,7,8-tetrahydro-[1,2,4]triazolo[4,3-b][1,2,4,5]tetrazin-6-yl)phenol), for mild steel in 1 M hydrochloric acid (HCl) hasbeen successfully reported for the first time. The inhibitor evaluated as corrosion inhibitor for mild steelin 1 M of Hydrochloric acid solution using electrochemical impedance spectroscopy (EIS), and electro-chemical frequency modulation (EFM) measurement techniques. Changes in the impedance parameterssuggested an adsorption of the inhibitor onto the mild steel surface, leading to the formation of protectivefilms. The results show that the inhibition efficiencies increased with increasing the concentrations of theinhibitors and decreased with increasing temperature. The maximum inhibition efficiency up to 67% atthe maximum concentration 0.5 mM. This shows that those inhibitors are effective in helping to reduceand slowing down the corrosion process that occurs to mild steel with a hydrochloric acid solution byproviding an organic inhibitor for the mild steel that can be weakened by increasing the temperature.The adsorption process of the synthesized organic inhibitor depends on its electronic characteristics inaddition to steric effects and the nature of metal surface, temperature degree and the varying degreesof surface-site activity. The synthesized inhibitor molecules were absorbed by metal surface and followLangmuir isotherms
تيسير سمير جعاز | Tayser Sumer Gaaz | 4286