Experimental Evaluation for the Inhibition of Carbon Steel Corrosion in Salt and Acid Media by New Derivative of Quinolin-2-One

Abstract

The inhibition ability of the new derivative (quinolin-2-one), namely (1-{[5-(2-Chloro-phenylazo)-2- hydroy-benzylidene]-amino}-4,7-dimethyl -6-nitro- 1H-quinolin-2-one (CPHAQ2O)) towards carbon steel corrosion in (3.5% NaCl) and (0.5M HCl) solutions were evaluated by potentiodynamic polarization at different inhibitor concentrations. Polarization curves showed that the evaluated compound acted as mixed inhibitors, and the adsorption of the evaluated inhibitor obeys the Langmuir adsorption isotherm in both salt and acid solutions. The results revealed that the percentage inhibition efficiency (%IE) in the salty solution (90.55%) is greater than that in the acidic solution (77.62%). The surface changes of the carbon steel and the film persistency of the inhibitor were studied using SEM (Scanning Electron Microscopy).

Effect of Graphene and Fe3O4 on the Protection Efficiency of Polyeugenol Conducted Coating for Stainless Steel 316L in NaCl solution

“…The fact that temperaturedependent increases in boundary layer thickness occurred can serve to illuminate this. 20 .…”

تخليق بوليمرات موصلة كهربائياً من البولي أثينول / أكاسيد المعادن النانوية للحماية من التأكل والنشاط البكتيري

“…For blank SS-304L. Additionally, the Rp values are higher than those of uncoated SS 304L, particularly after the addition of nanomaterials 19,20 .…”

Innovation of Imine Metal Chelates as Corrosion Inhibitors at Different Media: A Collective Study

“…Adsorption is how the inhibitors work on the metal surface [ 62 , 63 ]. The performance of inhibitors increases in the arrangement of P > S > N > O, as it depends on the presence of electron density stand out surrounding atoms, the number of presented binding sites for adsorption in a receptor structure size, charge densities, adsorption mechanism and the formation of metal chelates [ 64 , 65 , 66 , 67 ]. Different parameters, including the inhibitor’s molecular size, the type of substituent, the nature of the metal and the electrolyte, influence the rate of adsorption on the surface [ 68 ].…”