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Evaluation of Adsorption Isotherm Parameters on Corrosion Rate of Metal using Water-Based Extracts as an Inhibitor in Acidic Medium

Ukpaka C.P.

Abstract


The research showcases the evaluation of MCS metal corrosion rate in terms of the effect of temperature and adsorption isotherm parameters monitored using water-based extracts with the aim to predict the Gibb’s free energy characteristics on inhibition integrity of the metal sample in acidic medium of 1.0M of HCl The water-based extract used are Selaginella myosurus, SM and Pneumatopter is pennigera, GF and the inhibition performance with respect to temperature profile reveals that the process was affected by the immersion time. The research further reveals that the thermodynamic and adsorption parameters demonstrate components and organic functional group capable of inhibiting corrosion was identified in both water-based plant extracts used for this investigation. The adsorption rate constant of the various samples species demonstrates increase and decrease as the temperature increases as this characteristic can be integrated to weight loss, corrosion rate, corrosion activation energy enthalpy, and entropy, which finally indeed, the Gibb’s free energy.

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References


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for Different Metal Surfaces and Corrosive Media: A Review. Processes, 8, 942;

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Chukwure L. D, Ukpaka C. P., Dagde K. K. (2020). Inhibitor efficiency relative to H2SO4 medium

of metals steel corrosion: Integration of plant extracts. Journal of Petroleum and Petrochemical

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Liriope platyphylla extract as a green inhibitor for mild steel corrosion in sulfuric acid medium.

Chemical Engineering Communications, 208(1), 72-88. DOI: 10.1080/00986445.2019.169200

Dehghani A., Bahlakeh G, Ramezanzadeh B., Ramezanzadeh, M. (2019). Highly effective mild

steel corrosion inhibition in 1.0 M HCl solution by novel green aqueous Mustard seed extract:

Experimental, electronic-scale DFT and atomic-scale MC/MD explorations. J. Mol. Liq., 293(11)

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Fang Y., Baviththira Suganthan, Ramaraja P. Ramasamy (2019). Electrochemical characterization

of aromatic corrosion inhibitors from plant extracts. Journal of Electro-analytical Chemistry, 840,

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Foaud, N. & Ali, A. I. (2012). Inhibition of Aluminum Corrosion in Hydrochloric Acid Solution

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