Der Pharma Chemica
Journal for Medicinal Chemistry, Pharmaceutical Chemistry and Computational Chemistry

Abstract

Adsorption Behaviour of Vitex doniana on Annealed Carbon Steel Corrosion in Hydrochloric Acid: Experimental and Theoretical investigations

Author(s): OOguike RS, Omizegba FI, Oni O, Akanang H, Shibdawa AM

The Interfacial activity of Vitex doniana (VD) leaves extract as inhibitor has been studied on carbon steel corrosion in hydrochloric acid solution using weight loss, gasometry, electrochemical techniques and quantum chemical calculations. Increase in inhibition efficiency with increased inhibitor concentration which indicate that VD molecules acted by accumulating at metal/electrolyte interface. Weight loss results show that inhibition efficiency increased with increase in inhibitor concentration but decreased with increase in temperature indicating a physical adsorption. Data obtained from the potentiodynamic polarization scan revealed that the corrosion inhibitor shifted corrosion potentials to more negative potential indicating prominent cathodic protection. The impedance data showed a decrease in double layer capacitance and an increase in charge transfer resistance which suggests that electron migration was retarded in the bulk solution. The Nyquist and Bode plots of the test solutions were similar in both inhibited and free medium but contained capacitive and inductive loops. To assess the interaction of VD molecules with Fe(110) surface, quantum chemical calculations were performed to elucidate the molecular reactivity parameters of inhibitor molecules while molecular dynamics studied the binding properties of inhibitor molecules on metal surface. Local reactivity was estimated and discussed through condensed Fukui indices. Theoretical calculations were carried out using Dmol3 basis set for all atoms.


FIND ARTICLES
SCImago Journal & Country Rank
 
kız uzun zamandır masaj salonunda çalışıyor çok sulanan erkek oluyor ama porno izle bir türlü hiç birine vermiyor Ama sonunda genç paraya sıkışıyor ve bir porno resimleri sikiş için çok para teklif eden genç adama sonunda kabul ediyor ve evlerine giren amatör pornolar maskeli hırsız genç kadının odasındaki çekmecelerde para ararken kadının seksi iç sikiş çamaşırlarına denk geliyor Onları koklayarak yarağı taş gibi oluyor daha sonra genç porno fotoğrafları kadın odaya bir den bire girince hırsızı görüyor ve bağırmaya başlıyor Hırsız hızlıca porno hikayeleri kızın ağzını elleri ile kapatarak tam kızın kalçalarını kucağına alarak sevişiyor
ankara escort
mobile bitcoin casino
Casumo no deposit bonus bitcoin nedir?