Evaluation of anticorrosive coatings on carbon steel in marine environments: Accelerated corrosion test and field exposure

Rosa Vera, Estefanía Cruz, Margarita Bagnara, Raquel Araya, RODRIGO GONZALO HENRIQUEZ NAVIA, Andrés Díaz-Gómez, Paula Rojas

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

This study assesses the behavior of two paint systems applied to A-36 steel, commonly used to cover industrial structures in marine environments. Accelerated tests were carried out in a salt spray chamber with a maximum of 3000 hours of exposure, while other tests were conducted in the field in five areas in Chile over a period of two years. Coatings were assessed with measurements of thickness, adherence, and blistering. The behaviors of these coatings were assessed using electrochemical impedance spectroscopy (EIS techniques, measuring the evolution of an impedance module at 0.1 Hz. The results show that, after two years of exposure or after 3000 hours in the salt spray chamber, the two coatings still present adequate protective properties, with an impedance module value log |Z| greater than 106 Ω cm2. However, for all tests, comparing C5MB and C5IB coating systems, the latter is always less protective for the steel.

Original languageEnglish
Pages (from-to)898-914
Number of pages17
JournalInternational Journal of Electrochemical Science
Volume13
Issue number1
DOIs
StatePublished - 1 Jan 2018
Externally publishedYes

Keywords

  • Accelerated test
  • Atmospheric exposure
  • Carbon steel
  • Corrosion
  • Organic coatings

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