Polymeric Coatings Used against Marine Corrosion of Naval Steel EN32

Abstract:

The life time of the metallic materials exposed to marine environment is influenced by their corrosion resistance. The marine environment is considered to be very aggressive to metallic materials used in the marine industry. In order to protect metallic substrates against corrosion process, important efforts have been made to develop corrosion resistance coatings, besides the cathodic protection systems. Thus, during the last years there were developed a series of organic protective coatings that have as principal component one or more polymers. This paper present a comparative investigation regarding the corrosion resistance of: i) uncoated naval steel EN32, ii) coated naval steel EN32 with a two-component polymeric primer and iii) coated naval steel EN32 with two-component polymeric primer followed by epoxy polyurethane paint coating. All the samples have been subjected to corrosion in seawater collected from the Black Sea (Mangalia sea port). In situ electrochemical measurements as: open circuit potential (OCP), polarization resistance (R_p), potentiodynamic polarization (PD) and cyclic voltammetry polarization (CV) were performed to monitor the corrosion process. The results showed an improved corrosion resistance of polymeric coatings in marine environment compared with uncoated naval steel EN32

• Periodical: Key Engineering Materials (Volume 699)
• Pages: 71-79
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.699.71
• Online since: July 2016
• Authors: Laurentiu Mardare, Lidia Benea*, Eliza Dănăilă, Valentin Dumitraşcu
• Keywords: Corrosion, Polymer, Protective Coatings

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