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Inhibitory action of aqueous garlic peel extract on the corrosion of carbon steel in HCl solution

2012; Elsevier BV; Volume: 65; Linguagem: Inglês

10.1016/j.corsci.2012.08.038

1879-0496

Simone Santana de Assunção Araújo Pereira, Michelle Macedo Pêgas, Tatiana López Fernández, Mariana Magalhães, Thaís Gadiole Schöntag, Dalva Cristina Baptista do Lago, Lílian Ferreira de Senna, Eliane D’Elia,

Hydrogen embrittlement and corrosion behaviors in metals

The effect of aqueous garlic peel extract on the corrosion process of carbon steel in 1 mol L−1 HCl was examined. The inhibition efficiency of C-steel in 1 mol L−1 HCl increased as the extract concentration and temperature increased. The inhibitory property of the extract is discussed in terms of the mechanism by which its components adsorb onto the C-steel surface. This adsorption process obeyed a Langmuir adsorption isotherm. HS-SPME GC analysis of the garlic peel extract suggests that sulphur compounds may play an important role in the inhibition process.