Comportamiento de ánodos de sacrificio en la protección de aluminio NV-5083 en agua de mar, bahía de Valparaíso

Rosa Vera, Carla Bobadilla, Alejandro Madrid

Resultado de la investigación: Contribución a una revistaArtículorevisión exhaustiva

Resumen

The behavior of aluminum and zinc alloys were evaluated and compared as sacrifice anodes in cathodic protection of aluminum NV-5083 hulls in seawater in Valparaíso bay. Samples of the aluminum alloy used to manufacture boat hulls and Al-Zn-In, Al-Zn-Sn, and Zn anodes were made. Electrochemical behavior was evaluated by means of polarization curves and corrosion potential as function of time. In parallel, galvanized pairs (boat hull-sacriice anode), were designed and immersed in the electrolyte for 16 days, determining the weight loss and evolution of the open circuit potential for each material. The results show that the aluminum based anodes provide the NV-5083 aluminum hull cathodic protection in seawater. However, they do not exceed the economical horizon and useful life of zinc anodes, because the aluminum based anodes present higher corrosion for the protection of a similar exposed area of aluminum.

Título traducido de la contribuciónBehavior of sacrifice anodes in the aluminium NV-5083 protection in seawater, Valparaíso bay
Idioma originalEspañol
Páginas (desde-hasta)63-69
Número de páginas7
PublicaciónInvestigaciones Marinas
Volumen34
N.º1
EstadoPublicada - 2006
Publicado de forma externa

Palabras clave

  • Catodic protection
  • Corrosion
  • Galvanic couple
  • Sacrifice anode
  • Seawater

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