Coatings systems for carbon steel protection againts biocorrosion and biofouling in sea seawater. A laboratory and field study

VIDELA, HÉCTOR A.; HERRERA, LIZ K.; PEREYRA, ANDREA M.; GIUDICE, CARLOS A.

Pernambuco, Brasil

Congreso; INTERCORR 2008 ABRACO; 2008

Asociación Brasileña de Corrosión

The performance of various coatings systems was assessed in laboratory and field experiments to avoid biocorrosion and biofouling deleterious effects on carbon steel of marine usage. < Microfouling and corrosion attack was observed by SEM (SEM) and corrosion products were characterized by X-ray diffraction (XRD). The performance of antifouling coatings was assessed in seawater immersion tests during an immersion period of 16 months. A coating system based on a lamellar zinc composition modified with an extender and an inhibitor used as primer and a high dissolution rate antifouling formulation as finishing coating showed the best performance. Key words: anticorrosive primer, lamellar zinc, antifouling coatings, carbon steel, seawater, biocorrosion, biofouling