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The effects of [Co 2  (SCN) 4(hmt) 2 (H 2 O) 6 . H 2 O] (SC1) and [Co (CN) 6  (Me 3 Sn) 3 (H 2 O). (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% at dose 25 × 10 −6  M for SC1 and SCP2, respectively.  IE  percent, on the other hand, dropped as the temperature range grew. SC1was adsorbed physically and chemically (mixed adsorption) but SCP2 was 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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RETRACTED ARTICLE: Chemical, electrochemical and surface studies of new metal–organic frameworks (MOF) as corrosion inhibitors for carbon steel in sulfuric acid environment