<abstract xmlns="http://www.w3.org/1999/xhtml"><p>The dissolution of aluminum alloy AA 1060 in 0.5 M and 1.0 M HCl was investigated using thermometric measurements. The reaction number of the aluminum coupons varied linearly with the concentration of the acid. Addition of Napoleonaea imperialis seed extract to the dissolving aluminium coupons lowered the reaction number in both concentrations of HCl by inhibiting the dissolution process. The inhibition efficiency of Napoleonaea imperialis seed extract was enhanced to a considerable extent in the presence of iodide ions with the synergistic parameter S > 1. The adsorption of Napoleonaea imperialis extract on the aluminium surface best aligned with the Langmuir adsorption isotherm model. The values of the free energy, ΔG<sub>ads</sub>for the adsorption process revealed the process to be spontaneous and physisorptive.</p></abstract>

The dissolution of aluminum alloy AA 1060 in 0.5 M and 1.0 M HCl was investigated using thermometric measurements. The reaction number of the aluminum coupons varied linearly with the concentration of the acid. Addition of Napoleonaea imperialis seed extract to the dissolving aluminium coupons lowered the reaction number in both concentrations of HCl by inhibiting the dissolution process. The inhibition efficiency of Napoleonaea imperialis seed extract was enhanced to a considerable extent in the presence of iodide ions with the synergistic parameter S > 1. The adsorption of Napoleonaea imperialis extract on the aluminium surface best aligned with the Langmuir adsorption isotherm model. The values of the free energy, ΔGadsfor the adsorption process revealed the process to be spontaneous and physisorptive.

A thermometric study on the kinetics of the acid dissolution of aluminium in the presence of Napoleonaea imperialis seeds extract and iodide ions

Ovidius University Annals of Chemistry

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

The dissolution of aluminum alloy AA 1060 in 0.5 M and 1.0 M HCl was investigated using thermometric measurements. The reaction number of the aluminum coupons...

A thermometric study on the kinetics of the acid dissolution of aluminium in the presence of Napoleonaea imperialis seeds extract and iodide ions

Published Online: Nov 20, 2018

Page range: 103 - 109

Received: Sep 10, 2018

Accepted: Oct 21, 2018

DOI: https://doi.org/10.2478/auoc-2018-0015

Keywords
aluminium, temperature, reaction number, Napoleonaea imperialis, inhibition efficiency, adsorption isotherm

© 2018 Habibat Faith Chahul, et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

A thermometric study on the kinetics of the acid dissolution of aluminium in the presence of Napoleonaea imperialis seeds extract and iodide ions

Published Online: Nov 20, 2018

Page range: 103 - 109

Received: Sep 10, 2018

Accepted: Oct 21, 2018

DOI: https://doi.org/10.2478/auoc-2018-0015

Keywordsaluminium, temperature, reaction number, Napoleonaea imperialis, inhibition efficiency, adsorption isotherm

© 2018 Habibat Faith Chahul, et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Keywords
aluminium, temperature, reaction number, Napoleonaea imperialis, inhibition efficiency, adsorption isotherm