Chemical, Electrochemical And Surface Studies of New Metal-Organic Frameworks (MOF) As Corrosion Inhibitors For Carbon Steel In Sulfuric Acid Environment

Abstract

The effects of [Co2(SCN)4(hmt)2(H2O)6. H2O] (SC1) and [Co (CN)6(Me3Sn)3(H2O). (qox)] (SCP2) MOF as corrosion inhibitors on C-steel in 0.5 M sulfuric acid solutions are illustrated utilizing mass reduction (MR), electrochemical [potentiodynamic polarization (PP), and AC electrochemical impedance (EIS)]. The experiments revealed that as the dose of these compounds rose, the inhibition efficacy (IE percent) of C-steel corrosion improved, reaching 80.7- 93.1 percent at dose 25x10-6 M for SC1 and SCP2, respectively. IE percent, on the other hand, dropped as the temperature range grew. Both SC1 and SCP2 were adsorbed physically on the surface of C-steel and conformed to the Langmuir adsorption isotherm equation. The PP studies revealed that these compounds act as mixed kind inhibitors. To establish the morphology of the inhibited C-steel surface, scanning electron microscopy (SEM), energy transmitted X-ray (EDX), and atomic force microscopy (AFM) studies were used. All tested experiments were in good agreement.

Computational insights into the corrosion inhibition potential of some pyridine derivatives: A DFT approach

“…The type and amount of metallic charge, the electrolytes, the electronic configuration of the inhibitory molecules, the temperature of the media, the subjection period, the type of substituents, etc. all affect the inhibitors' ability to adsorb on the metallic surface [31][32][33][34][35].…”