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Application of some condensed uracils as corrosion inhibitors for mild steel / Dileep Kumar Yadav in Industrial & engineering chemistry research, Vol. 51 N° 46 (Novembre 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 46 (Novembre 2012) . - pp. 14966-14979 Titre : Application of some condensed uracils as corrosion inhibitors for mild steel : Gravimetric, electrochemical, surface morphological, UV–visible, and theoretical investigations Type de document : texte imprimé Auteurs : Dileep Kumar Yadav, Auteur ; Mumtaz Ahmad Quraishi, Auteur Année de publication : 2013 Article en page(s) : pp. 14966-14979 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Ultraviolet  radiation  Mild  steel  Corrosion  inhibitor Résumé : Gravimetric, electrochemical impedance spectroscopy (EIS), linear polarization resistance (LPR), and potentiodynamic polarization (PDP) studies were carried out to investigate the comparative corrosion protection efficiency of four condensed uracils (CUs) on mild steel in 1 M HCl. EIS plots indicated that the addition of inhibitors increases the charge-transfer resistance (Rct), decreases the double-layer capacitance (Cdl) of the corrosion process, and hence increases inhibition performance. Moreover, the thermodynamic activation parameters for the corrosion reaction were calculated and discussed in relation to the stability of the protective inhibitor layer. The morphology of the surface was examined by scanning electron microscopy (SEM), and the surface composition was evaluated using energy-dispersive X-ray spectroscopy (EDX) to verify the presence of inhibitor on the mild steel surface. Quantum chemical study suggests that the heterocyclic rings in these compounds are structurally essential for the protection of the mild steel surface. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26679616 [article] Application of some condensed uracils as corrosion inhibitors for mild steel : Gravimetric, electrochemical, surface morphological, UV–visible, and theoretical investigations [texte imprimé] / Dileep Kumar Yadav, Auteur ; Mumtaz Ahmad Quraishi, Auteur . - 2013 . - pp. 14966-14979. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 46 (Novembre 2012) . - pp. 14966-14979 Mots-clés : Ultraviolet  radiation  Mild  steel  Corrosion  inhibitor Résumé : Gravimetric, electrochemical impedance spectroscopy (EIS), linear polarization resistance (LPR), and potentiodynamic polarization (PDP) studies were carried out to investigate the comparative corrosion protection efficiency of four condensed uracils (CUs) on mild steel in 1 M HCl. EIS plots indicated that the addition of inhibitors increases the charge-transfer resistance (Rct), decreases the double-layer capacitance (Cdl) of the corrosion process, and hence increases inhibition performance. Moreover, the thermodynamic activation parameters for the corrosion reaction were calculated and discussed in relation to the stability of the protective inhibitor layer. The morphology of the surface was examined by scanning electron microscopy (SEM), and the surface composition was evaluated using energy-dispersive X-ray spectroscopy (EDX) to verify the presence of inhibitor on the mild steel surface. Quantum chemical study suggests that the heterocyclic rings in these compounds are structurally essential for the protection of the mild steel surface. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26679616

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