RT info:eu-repo/semantics/article
T1 Studies on the adsorption of heptamolybdate ions on AISI 304 stainless steel from acidic HCl solution for corrosion inhibition
A1 Souto, Ricardo Manuel
A1 Ait Albrimi, Y.
A1 Ait Addi, A.
A1 Douch, J.
A1 Hamdani, M.
K1 Stainless steel
K1 Corrosion inhibition
K1 Heptamolybdate ions
K1 Adsorption
K1 Thermodynamic properties;
K1 Acidic media
AB Surface interaction of heptamolybdate ions Mo7O246- on ASI 304 stainless steel (SS) greatly reducesthe corrosion rate of the material in acid environments, providing an environmentally-friendly inhibitorsystem. Corrosion inhibition properties have been studied in naturally aerated 0.5 M HCl solution fromweight loss measurements. The influences of inhibitor concentration and solution temperature wereinvestigated. The percentage inhibition efficiency, SW(%), increased for increasing concentrations ofthe ionic inhibitor species. Conversely, the increase of temperature decreased the inhibition efficiency.That is, the corrosion rate, vcor, was faster at higher temperature whereas it was slower for increasinginhibitor concentrations. The adsorption of the inhibitor ions onto the SS surface was found to followthe Langmuir adsorption isotherm. The values of the standard adsorption free energy, 0ads G , areconsistent with a spontaneous physisorption mechanism of the inhibitor ions on the surface of the steel.
YR 2016
FD 2016
LK http://riull.ull.es/xmlui/handle/915/19018
UL http://riull.ull.es/xmlui/handle/915/19018
LA en
DS Repositorio institucional de la Universidad de La Laguna
RD 26-dic-2024