Proteção catódica de estrutura de concreto armado antes e após o estabelecimento de processo corrosivo


The guarantee of the durability of reinforced concrete structures is increasingly required, especially in works that require high investment and great socio-environmental impact. In Brazil, the study of the durability of concrete structures has received increasing attention; however, until now the studies are few as the application of corrosion protection techniques, such as the impressed current cathodic protection (PCCI) that is the subject of this article. The PCCI system operation, before and after the establishment of the corrosive process in the reinforcement of new structures, was simulated in specimens (CPs) submitted to cycles of contamination with saline solution. In reference CPs were monitored the open circuit potential and the accumulated load. The results showed the need for periodic adjustments in the system to maintain compliance with the established criteria. The system operation for the passive steel condition required a lower protection current density than the required to the operation after the establishment of the active state of corrosion.

ARAÚJO, Adriana de; CARDOSO, Juliana Lopes; RIBEIRO, José Luis Serra; BRAGA, Marcos V.S.; ROSA, Thales Gomes; PANOSSIAN, Zehbour.Proteção catódica de estrutura de concreto armado antes e após o estabelecimento de processo corrosivo. In: CONFERÊNCIA SOBRE TECNOLOGIA DE EQUIPAMENTOS, COTEQ, 2019, Rio de Janeiro. Anais… 10 p.

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