Resumen

CORTES, Ramón; RODRIGUEZ, Regina  y  CAPRA, Andre. CARACTERIZACIÓN DE ACEROS ALONIZADOS RESISTENTES A LA CORROSIÓN UTILIZADOS EN LA INDUSTRIA DEL PETRÓLEO. Rev. Fac. Ing. - Univ. Tarapacá [online]. 2004, vol.12, n.1, pp.43-48. ISSN 0718-1337.  http://dx.doi.org/10.4067/S0718-13372004000100006.

In the petroleum refining process, the metallic structure facilities deterioration by corrosion is caused by  the presence of  sulphidric acid with naphtenic gas, the more serious damage caused by hydrogen. A form of protection against this type of corrosion is the use of  aluminum coating. This coating represents passive and active protection. In addition, the presence of intermetallic region of Fe/Al in the zone of union between aluminum and the steel, obtained by additional heat treatment, represents another protective barrier against  hydrogen diffusion in the steel. In industrial scale intermetallic regions are CREATED BY alonization processes, in  tubes that require a heat treatment of 1050 ^oC, to allow the aluminium diffusion in the tube material. In order to make the alonized steel preparation, test tubes were prepared and observations with optical and electronic microscopes were made. The alonized  surface studied showed greater hardness and it was observed that the aluminum diffusion was significant, allowing the formation of several types of  intermetallic Fe/Al, as well as a region of solid solution of aluminum and iron

Palabras clave : Alonized steel; Fe/Al intermetallic; naphtenic corrosion.

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