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Electrochemical investigation of substituted pyranopyrazoles adsorption on mild steel in acid solution / Dileep Kumar Yadav in Industrial & engineering chemistry research, Vol. 51 N° 24 (Juin 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 24 (Juin 2012) . - pp. 8194-8210 Titre : Electrochemical investigation of substituted pyranopyrazoles adsorption on mild steel in acid solution Type de document : texte imprimé Auteurs : Dileep Kumar Yadav, Auteur ; M. A. Quraishi, Auteur Année de publication : 2012 Article en page(s) : pp. 8194-8210 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Mild  steel  Adsorption Résumé : Four substituted pyranopyrazole derivatives (PPZs) were synthesized and their effects on the electrochemical behavior of mild steel in 1 M HCl were investigated using gravimetric measurements, Tafel extrapolation method, linear polarization resistance (LPR), and electrochemical impedance spectroscopy (EIS). Tafel polarization measurements revealed that these compounds effectively suppressed both the anodic and cathodic processes of mild steel corrosion in add solution and acted as mixed-type inhibitors. Scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDX) examinations of electrode surface confirmed the existence of adherent layer of inhibitor on electrode surface. The UV―visible absorption spectrum of inhibitor solution containing mild steel indicated the formation of Fe―PPZ complex. Quantum chemical calculations have been used to evaluate the structural, electronic, and reactivity parameters of the selected pyranopyrazole derivatives in relation to their inhibition action. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26029655 [article] Electrochemical investigation of substituted pyranopyrazoles adsorption on mild steel in acid solution [texte imprimé] / Dileep Kumar Yadav, Auteur ; M. A. Quraishi, Auteur . - 2012 . - pp. 8194-8210. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 24 (Juin 2012) . - pp. 8194-8210 Mots-clés : Mild  steel  Adsorption Résumé : Four substituted pyranopyrazole derivatives (PPZs) were synthesized and their effects on the electrochemical behavior of mild steel in 1 M HCl were investigated using gravimetric measurements, Tafel extrapolation method, linear polarization resistance (LPR), and electrochemical impedance spectroscopy (EIS). Tafel polarization measurements revealed that these compounds effectively suppressed both the anodic and cathodic processes of mild steel corrosion in add solution and acted as mixed-type inhibitors. Scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDX) examinations of electrode surface confirmed the existence of adherent layer of inhibitor on electrode surface. The UV―visible absorption spectrum of inhibitor solution containing mild steel indicated the formation of Fe―PPZ complex. Quantum chemical calculations have been used to evaluate the structural, electronic, and reactivity parameters of the selected pyranopyrazole derivatives in relation to their inhibition action. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26029655