Revisión y análisis de la corrosión a largo plazo de recubrimientos basados en aleaciones de Zinc-Aluminio-Magnesio, como alternativa a los recubrimientos tradicionales basados en cinc, para canalizaciones eléctricas

  • Ernesto Chenoll-Mora Engineering Projects Department. Universitat Politècnica de València
  • Vicente Agustín Cloquell-Ballester ACUMA Research Centre. Universitat Politècnica de València
Palabras clave: Corrosión atmosférica, recubrimientos, proyecto, canalización, aleaciones ZM

Resumen

Se presenta una revisión del estado del arte en lo que se refiere a recubrimientos metálicos basados en aleaciones de cinc-aluminio-magnesio, para la protección frente a la corrosión, de sistemas metálicos de canalización eléctrica, como alternativa a los tradicionales recubrimientos metálicos basados en cinc. Esta revisión contempla su evolución en el tiempo, las distintas calidades y designaciones existentes en el mercado, su estructura y composición, la normativa internacional que los regula, las principales marcas comercializadas y sus características, los principales fabricantes de canalización eléctrica que ofrecen dichas aleaciones, y finalmente, un análisis de la resistencia a la corrosión sobre la base de ensayos de campo y ensayos de corrosión acelerada, los cuales han formado igualmente parte de esta investigación. A partir de dicho análisis, se ha determinado un modelo matemático para la estimación de la corrosión a largo plazo, en el que se evidencia el comportamiento logarítmico de la función corrosión-tiempo. Con todo y con ello, el artículo pretende, por una parte, ser un compendio de los aspectos clave a considerar en este tipo de aleaciones y por otra, dar soporte al ingeniero de proyectos en la toma de decisión, que supone la elección de este tipo de recubrimiento frente a los recubrimientos basados en zinc, proporcionándole los aspectos más relevantes a considerar, de tal forma que se asegure el cumplimiento de las especificaciones del proyecto en lo que a resistencia a la corrosión se refiere.

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Publicado
2019-06-06
Sección
Artículos