Produção Nacional
Revisado por pares
The inhibitory action of Bauhinia purpurea extracts on the corrosion of carbon steel in sulfuric acid medium
2016; Associação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímer; Volume: 19; Issue: 1 Linguagem: Inglês
10.1590/1980-5373-mr-2015-0494
ISSN1980-5373
AutoresIuri Bezerra de Barros, Marco André Abud Kappel, Priscila Moraes dos Santos, Valdir Florêncio da Veiga, Eliane D’Elia, Ivan Napoleão Bastos,
Tópico(s)Concrete Corrosion and Durability
ResumoThe 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.
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