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Effects of ethanolamine and ethylamine on the entropy content of the corrosion of mild steel in 1mol/l HCl solution

Author(s): I.A.Akpan, N.O.Offiong

The acid corrosion of mild steel in the absence and presence of ethanolamine and ethylamine was investigated by weight loss method at room temperature (298K). The inhibition efficiency was found to increase with increase in inhibitor concentration. The entropy content of the aggressive medium(-279.31J/K/mol) reduced to -296.60J/K/mol on addition of 1.5ml of ethylamine and -288.98J/K/mol on addition of 1.5ml of ethanolamine. The mechanismof inhibition was attributed to the molecular structure of the compounds.

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