| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1469139 | Corrosion Science | 2013 | 10 Pages |
•Three novel Schiff bases were evaluated as corrosion inhibitors for steel in H2SO4.•The inhibition efficiency of Schiff bases was enhanced by addition of iodide ions.•SB-I acts as anodic inhibitor while SB-II and SB-III act as mixed-type inhibitor.•The adsorption of inhibitors on the steel surface followed the Langmuir isotherm.•The studied inhibitors were chemically adsorbed on the surface of carbon steel.
The inhibition effect of three Schiff bases (SB-I, SB-II and SB-III) and its synergistic effect with KI on the corrosion of carbon steel in 0.5 M H2SO4 solution was studied by potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) techniques. Scanning electron microscopy (SEM) was used to characterize the steel surface. The inhibition efficiency increases with the concentration of the Schiff bases and increased further with the presence of KI. The thermodynamic parameters Kads and ΔG°adsΔG°ads are calculated and discussed. The probable inhibitive mechanism is proposed from the viewpoint of adsorption theory.
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