The inhibitory action of Bauhinia purpurea extracts on the corrosion of carbon steel in sulfuric acid medium

AUTOR(ES)

Barros, Iuri Bezerra de, Kappel, Marco André Abud, Santos, Priscila Moraes dos, Veiga Junior, Valdir Florêncio da, D'Elia, Eliane, Bastos, Ivan Napoleão

FONTE

Mat. Res.

DATA DE PUBLICAÇÃO

12/02/2016

RESUMO

The inhibitory effect of Bauhinia purpurea (Fabaceae) extract was studied in the corrosion of carbon steel in 1.0 mol∙L-1 sulfuric acid solution. This plant was collected from the Brazilian rainforest. The carbon steel protection was observed by varying the extract concentration from 50 to 500 mg∙L-1. Polarization curves revealed that this extract acted as an adsorption inhibitor decreasing both anodic and cathodic density currents. Weight loss measurements showed that the extract remains stable for at least 72 hours. The adsorption process of this extract obeyed the Langmuir adsorption isotherm. Lastly, Arrhenius plot suggested the physical adsorption of the extract.

Documentos Relacionados

• Electrochemical evidences of the inhibitory action of propargyl alcohol on the electrooxidation of nickel in sulfuric acid
• Investigation of Physicochemical Characteristics of Heavy, Medium and Blend Crude Petroleum on Corrosion Resistance of AISI 1020 Carbon Steel
• Effect of Phosphate on the Corrosion of Carbon Steel and on the Composition of Corrosion Products in Two-Stage Continuous Cultures of Desulfovibrio desulfuricans†
• Atmospheric corrosion performance of carbon steel, galvanized steel, aluminum and copper in the North Brazilian coast
• Evaluation of Aqueous Coffee Husks Extracts as a Corrosion Inhibitor of 1020 Carbon Steel in 1 mol L-1 HCl Solution