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| Article Name : | | | EFFECTOF TEMPERA TURE ON PROTECTIVE PROPENSITYOF ACACIANILOTICAON ACID CORROSION OFCOPPER | | Author Name : | | | SW ATI Y ADA V AND ALKASHARMA | | Publisher : | | | Ashok Yakkaldevi | | Article Series No. : | | | ROR-278 | | Article : | |  | Author Profile | | Abstract : | | | The inhibition effect of Acacia nilotica P ethanolic extract on copper corrosion in 0.5N hydrochloric acid has been studied by weight loss method between 303-353K temperatur es. The inhibition efficiency incr eased with incr ease in concentration of plant extract. The corrosion rate incr eased with incr ease in temperatur e and decreased with incr ease in concentration of inhibitor compared to blank. The adsorption of inhibitor on Cu metal have been found to obey Langmuir adsorption isotherm. The values of activation energy (Ea), free energy of adsorption (? G ), enthalpy of adsorption (? H), ads and entropy of adsorption (? S) were calculated. The G values indicate that the adsorption of EE P on copper metal surface is physical in nature. Surface analysis (FT An IR) was also carried out to establish the mechanism of corrosion inhibition on copper corrosion in hydrochloric acid medium. | | Keywords : | | - Kinetic parameters.
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