Abstract

BOUYANZER, A.; HAMMOUTI, B.; MAJIDI, L.  and  HALOUI, B.. Testing Natural Fenugreek as an Ecofriendly Inhibitor for Steel Corrosion in 1 M HCl. Port. Electrochim. Acta [online]. 2010, vol.28, n.3, pp.165-172. ISSN 0872-1904.

The influence of a natural extract of fenugreek on the corrosion of steel in 1 M HCl has been studied by weight loss, polarisation and EIS measurements. Results obtained show that the natural substance inhibits the corrosion process. It acts on the cathodic domain without modifying the reduction mechanism. The inhibition efficiency increases with fenugreek concentration to attain 94% at extract of 10 g/L of fenugreek at temperatures between 308 and 353K. It is an efficient inhibitor. The effect of temperature on the corrosion behaviour of steel indicated that inhibition efficiency is temperature-independent. The activation energy of adsorption is determined.

Keywords : steel; natural substance; fenugreek; inhibition; corrosion; acid.

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