Published

2011-01-01

Evaluating protection systems against marine corrosion of aeronautic alloy Alclad 2024-T3

Evaluación de diferentes sistemas de protección contra la corrosión marina en la aleación de aplicación aeronáutica Alclad 2024-T3

Keywords:

Alclad 2024-T3, marine corrosion, organic coating, SEM, electrochemical impedance spectroscopy, corrosion. (en)
Alclad 2024-T3, corrosión marina, recubrimientos orgánicos, SEM, espectroscopía de impedancia electroquímica, corrosión. (es)

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Authors

  • William Aperador Chaparro Universidad Militar Nueva Granada
  • Andres Felipe Escobar Mosquera Universidad del Valle
  • Fabian Andrés Pérez Londoño Universidad del Valle

This paper shows how two coating systems were obtained as an alternative for protection against corrosion of al clad 2024-T3which is used in battery compartment manufacture for T-41 aircraft. Such systems consist of three types of organic resin: a first layer of P-115 polyester resin as the first coating on both systems, and a second layer of Hetron 197-3 polyester resin in the first system and vinylester resin in the second one. Scanning electron microscopy (SEM) was used for surface morphology analysis, showing the roughness produced by surface treatment. The coatings were electrochemically characterised by electro chemical impedance spectroscopy (EIS) and Tafel polarization curves; it was found that both systems had good performance against corrosion in a marine environment and the chemical surface preparation system had a superior protective pattern for Alodine5700 + 197-3 Hetron, a 1.42x10-12mpy corrosion rate being obtained while substratum rate was 1.59x10-7 mpy.

Se muestra la obtención de dos sistemas de recubrimientos protectores como una alternativa de protección contra la corrosión de la aleación de aluminio Alclad 2024-T3, que es utilizada en la fabricación del compartimiento de la batería de los aviones T-41. Dichos sistemas constan de tres tipos de resinas orgánicas: una primera capa de resina poliéster P-115, a manera de imprimante en ambos sistemas de recubrimientos, y una segunda capa de resina de poliéster Hetron 197-3 en el primer caso, o de resina vinil-éster F-010 en el segundo. El análisis de la morfología superficial se realizó mediante microscopía electrónica de barrido (SEM), observando la rugosidad generada por el tratamiento superficial. El estudio electroquímico de los recubrimientos se desarrolló mediante la técnica de espectroscopía de impedancia electroquímica (EIS) y curvas de polarización Tafel; de esta manera se encontró que todos los sistemas presentan un buen desempeño frente a la corrosión en un medio marino, y que el sistema con preparación superficial química muestra un comportamiento protector superior para el Alodine 5700 + Hetron 197-3; se obtuvo una velocidad de corrosión 1,42 x 10-12 mpy, mientras que para el sustrato la velocidad fue de 1,59 x 10-7 mpy.

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How to Cite

Evaluating protection systems against marine corrosion of aeronautic alloy Alclad 2024-T3. (2011). Ingeniería E Investigación, 31(1), 224-232. https://doi.org/10.15446/ing.investig.v31n1.20558

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Copyright (c) 2011 William Aperador Chaparro, Andres Felipe Escobar Mosquera, Fabian Andrés Pérez Londoño

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