Resumen

CASTELLANOS, Marta. I  y  DUQUE, Zoilabet. Evaluation of AA 3003 exposed to media containing anaerobic bacteria. Rev. Fac. Ing. UCV [online]. 2014, vol.29, n.2, pp.117-123. ISSN 0798-4065.

The use of the 3003 series aluminum alloys (AA 3003) is diverse in the industrial systems (storage tanks, chemical equipments, among others). This is due to its high resistance to corrosion as a result of passive films developed in presence of oxidizing media. However, there is a lack of evidence to show their behaviour in lacustrine applications in which there is a significant biomass formation. For this reason, the objective of this paper is to describe the behavior of AA 3003 in oxygen-free (reduced) media. To this aim, the material was settled in immersion with anaerobic bacteria cultures, specifically in media containing sulphate-reducing bacteria (SRB) and total heterotrophic facultative bacteria (THFB). Both types of microorganisms came from sessile populations developed on coupons previously immersed in Maracaibo Lake. Electrochemical and microscopic techniques were used for the evaluation of the corrosive behavior. The results indicated that the AA-3003 resistance to corrosion increased over time, in presence of the BHTF and SRB.

Palabras clave : Aluminum; Al 3003; Biocorrosion; EIS; SRB; Anaerobic.

        · resumen en Español     · texto en Español     · Español ( pdf )