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

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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.

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