The Effects ofCassia SiameaLam. Root Extract on the Corrosion and Kinetics of Corrosion Process of Copper in Alkaline Solutions | Zendy

Alfred Ikpi Onen | Zendy; Bethrand Tabugbo Nwufo | Zendy; Eno E. Ebenso | Zendy

Open Access

The Effects ofCassia SiameaLam. Root Extract on the Corrosion and Kinetics of Corrosion Process of Copper in Alkaline Solutions

Author(s) -

Alfred Ikpi Onen,

Bethrand Tabugbo Nwufo,

Eno E. Ebenso

Publication year - 2011

Publication title -

journal of chemistry

Language(s) - English

Resource type - Journals

eISSN - 2090-9063

pISSN - 2090-9071

DOI - 10.1155/2011/372903

Subject(s) - cassia , corrosion , copper , kinetics , chemistry , metallurgy , nuclear chemistry , inorganic chemistry , materials science , physics , medicine , alternative medicine , pathology , traditional chinese medicine , quantum mechanics

The effect of Cassia siamea lam. (CSL) root extract as a corrosion inhibitor of copper in 0.50 M NaOH solutions was investigated using absorbance difference technique at 30 °C and 40 °C. CSL root extract inhibited the corrosion of copper in 0.50 M NaOH solutions and the inhibition efficiency (% IE) increased to a maximum of 78.3±2.3% with increasing concentration of the extract but decreased with increasing temperature. The adsorption of CSL root extract on copper surface followed the Langmuir adsorption model with the average heat of adsorption, Qads and free energy of adsorption, ΔGads of -8.98 kJmol-1 and -8.70 kJmol-1 respectively. A kinetic treatment of the data revealed a first order kinetics with respect to copper in the presence and absence of the extract.

The content you want is available to Zendy users.

Already have an account? Click here to sign in.

Having issues? You can contact us here

Accelerating Research