Microbiological Corrosion in Low Carbon Steels

Ingeniería Investigación y Tecnología. 2009;10(1):9-19

 

Journal Homepage

Journal Title: Ingeniería Investigación y Tecnología

ISSN: 1405-7743 (Print)

Publisher: Universidad Nacional Autónoma de Mexico

LCC Subject Category: Technology: Technology (General) | Technology: Engineering (General). Civil engineering (General)

Country of publisher: Mexico

Language of fulltext: Spanish; Castilian, English

Full-text formats available: PDF, HTML

 

AUTHORS

O. Medina–Custodio
A. Ortiz–Prado
V.H. Jacobo–Armendáriz
R. Schouwenaars–Franssens

EDITORIAL INFORMATION

Double blind peer review

Editorial Board

Instructions for authors

Time From Submission to Publication: 52 weeks

 

Abstract | Full Text

The Microbiologically Induced Corrosion affects several industries, such as oil industry where it is estimated that 20% to 30% pipes failures are related with microorganism . The chemical reactions generate ions transfer, this validate the use of electrochemical techniques for its analysis. Coupons submerged in a nutritional medium with presence and absence of three different microorganisms during two periods, 48 hours and 28 days we restudied. Polarization resistance (Rp) and Electrochemical Impedance Spectroscopy (EIS) techniques we re applied to determine the corrosivity of the systems. The results show a greater corrosive effect of abiotic system, this indicates a microorganisms protection effect to the metal, opposite to the first hypothesis. This result was ratified observing surfaces coupons by using Scanning Electron Microscopy (SEM) technique. A possible mechanism based on Evans – Tafel graph is proposed to explain inhibitor microorganism effect.