Author/Authors :
suarez-hernandez, r. universidad autónoma del estado de morelos - centro de investigaciones en ingeniería y ciencias aplicadas, Cuernavaca, Mexico , dominguez-patiño, g.f. universidad autónoma del estado de morelos - facultad de ciencias químicas e ingeniería, Cuernavaca, Mexico , gonzalez-rodriguez, j.g. universidad autónoma del estado de morelos - centro de investigaciones en ingeniería y ciencias aplicadas, Cuernavaca, Mexico , tello, i. universidad autónoma del estado de morelos - facultad de ciencias biologicas, Cuernavaca, mexico , salinas-bravo, v.m. instituto nacional de electricidad y energias limpias - department of combustion, Temixco, Mexico , chacon-nava, j.g. centro de investigacion en materiales avanzados, Chihuahua, Mexico
Abstract :
An evaluation of Lentinula edodes (L. edodes) extract as a green corrosion inhibitor for 1018 carbon steel in 0.5 M H_2SO_4 was carried out by using weight loss tests, potentiodynamic polarization curves and electrochemical impedance spectroscopy measurements. These tests were complemented by electronic microscopy analysis, infrared and UV-vis spectroscopy as well as mass chromatography. It has been found that L. edodes is an efficient, mixed type of inhibitor, which increases with its concentration and immersion time, but decreasing with the testing temperature. The way that L. edodes adsorbs on to the metal surface is chemical by following a Langmuir type of adsorption isotherm, to form protective corrosion products due to the existence of compounds, with heteroatoms such as C, O and N, in functional groups such as amine, which are the responsible for the corrosion protection.
