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Título del libro: 17th International Corrosion Congress 2008: Corrosion Control In The Service Of Society
Título del capítulo: A study of the use of corrosion inhibitor on the corrosion mechanism and the bacteria growth of Desulfovibro vulgaris using electrochemical noise

Autores UNAM:
CARLOS ALBERTO GONZALEZ RODRIGUEZ; FRANCISCO JAVIER RODRIGUEZ GOMEZ;
Autores externos:

Idioma:
Inglés
Año de publicación:
2008
Palabras clave:

Artificial seawater; Bacteria growth; Chemical reagents; Chemical substance; Corrosion mechanisms; Corrosion media; Corrosion process; Corrosion products; Desulfovibrio vulgaris; Electrochemical noise; Electrochemical parameters; Generalized corrosion; Hydrocarbon product; Imidazolines; Localization index; Localized corrosion; Metallic surface; Microbiological induced corrosion; Noise resistance; Petrochemical industry; Sulfate reducing bacteria; Vulgaris; Corrosion inhibitors; Corrosion prevention; Hydrocarbons; Microbiology; Seawater; Bacteria


Resumen:

The use of corrosion inhibitors on systems related to the transport of hydrocarbon products is a common practice in the petrochemical industry. The efficiency of this chemical reagent is affected in many ways by a lot of variables; one of them is the presence of microorganisms. The presence of these microorganisms can modify the metallic surface, the corrosion media, or cause the formation of corrosion products and layers of chemical substances attached on the same surface. In the present work, the electrochemical parameters Localization index (LI) and noise resistance (R n) obtained with the technique Electrochemical Noise (EN) were used to analyze and determine the way on which the growth of the sulfide-reducing bacteria (SRB) Desulfovibrio vulgaris in different nutritious media (artificial seawater, Postgate and NACE) modify the efficiency corrosion inhibitors imidazoline on the surface of an AISI steel 1018. The results obtained show that on each phase of the bacteria growth with the presence of the corrosion inhibitor (imidazoline), the values for the LI and R n present significant variations. These variations define the corrosion processes like localized corrosion, mixed corrosion and generalized corrosion, depending on the particular phase of the bacteria growth. © 2009 by NACE International.


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