Electrochemical Study about Microorganisms Induced Corrosion in Inconel

 

G. Domínguez-Sánchez,* C. Gaona Tiburcio, F.M. Almeraya-Calderón, A. Martínez-Villafañe

 

Centro de Investigación en Materiales Avanzados S.C., División de Deterioro de Materiales,Av. Miguel de Cervantes 120, Complejo Industrial Chihuahua, 31109 Chihuahua, Chih., México

 

Received 4 April 2004; accepted 2 June 2004

 

 

Abstract

Inconel 600 has been designed to heat resistance. It is used in the chemistry industry, food industry and, of course, in the production of electric energy, among others.

The goal of this project was to decrease the costs in the equipments and pipes deterioration by prolonging their lifetime, controlling and preventing their deterioration by means of appropriated and programmed maintenance, but above all knowing the mechanism and kinetic of corrosion that affects them.

We used polarization curves to evaluate the effect of wild culture isolated from a traditional thermoelectric plant located northern Mexico.

The studied culture was isolated by enrichment cultures in two phases, in a selective medium for sulfate-reductive bacteria in environmental temperature. It was selected for being thermo resistant and promising the largest influence in the corrosion rate.

Inconel 600 keeps a multiple protection control until week 7, then it becomes an anodic protection control and later it becomes unstable to these cultures.

 

Keywords: corrosion, microorganisms, Inconel 600, polarization curves.

 

 

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References

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* Corresponding author. E-mail address: genoveva.dominguez@cimav.edu.mx