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Derivatives of l, 10 Phenanthroline as Environmentally Safe Corrosion Inhibitor for Corten A Steel in 12% M HCI Solution : Experimental and Theoretical Investigation  
Derivatives of l, 10 Phenanthroline as Environmentally Safe Corrosion Inhibitor for Corten A Steel in 12% M HCI Solution : Experimental and Theoretical Investigation
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TheinhibitioneffectoftwoderivativesofI,10phenanthroline:2,9-dimethyl-l,lO-phenanthroline(DMPHEN)and5,6-epoxy-5,6-dihydro-l,10phenanthroline(EPOPHEN)oncortenAsteel(CS)in12%HClwasstudiedusingpotentiodynamicpolarization,electrochemicalimpedancespectroscopy(EIS)andweightlosstechniques.ThesurfacemorphologyofCSwasexaminedwithscanningelectronmicroscopy(SEM).TheexperimentalresultsshowthatbothDMPHENandEPOPHENaregoodinhibitorsforCSintheacidicmediumandtheinhibitionefficiencyincreasesastheconcentrationoftheinhibitorswasincreased.Thepolarizationmeasurementsindicatethatthestudiedcompoundsactasmixedtypeinhibitor.Thermodynamicparametersiefreeenergyofadsorption,enthalpy,entropyandactivationenergywerecalculated,thevaluesoftheseparametersshowedgoodinteraction.Resultsfromquantumchemicalcalculationswereusedtoexplainthemechanismoftheadsorptionprocess.
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