Abstract
The deterioration behavior of aluminum alloy in 1M Hydrochloric acid and 1M Sodium hydroxide solution in fern extract was investigated using a weight loss technique. Aluminum alloy coupons of dimension 4 by 4 cm were immersed in test solutions of uninhibited acid and alkaline solutions, and also those containing the extract concentrations of 1, 2, 3, 4, and 5 g/l at ambient temperature for 168 hours. The test results show that the fern extract exhibited lower inhibitive properties in the alkaline than in the acidic medium. The observed adsorption characteristics were best described using Langmuir isotherm. The thermodynamic properties obtained were best described by physical adsorption mechanisms.
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