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Información tecnológica

versión On-line ISSN 0718-0764

Resumen

VILLADA, Fernando; MOLINA, Juan D  y  VELILLA, Esteban. Useful Life Model for Steel-Zinc Structures used in the Transmission of Electric Power in Colombia. Inf. tecnol. [online]. 2009, vol.20, n.6, pp.57-66. ISSN 0718-0764.  http://dx.doi.org/10.4067/S0718-07642009000600008.

An atmospheric corrosion degradation model for steel and zinc used in the transmission system of electric power in Colombia is developed. Three important aspects are identified: the definition of corrosion rate, the probability distribution function of useful life and the inspection/maintenance plan that favours a longer useful life. The model identifies mass loss and thickness loss functions, defining limits for degradation and fault modes which are simulated using Markov chains to evaluate the structure availability and the optimal inspection and maintenance frequency. The results allow establishing zones with lower service life and their impact on the regulatory life. It is concluded that knowledge of degradation mechanisms allows a better definition of inspection and maintenance frequencies under a regulatory life.

Palabras clave : steel-zinc structures; atmospheric corrosion; transmission lines; electric power.

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