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.

Recife, Brasil

Congreso; INTERCORR 2008 ABRACO, 28º Congresso Brasileiro de Corrosão y 2nd International Corrosion Meeting; 2008

ABRACO

The performance of various coatings systems was assessed in laboratory and field experiments to avoid biocorrosion and biofouling deleterious effects on navy carbon steel in polluted harbor seawater. Microfouling and corrosion attack were observed by scanning electron microscopy (SEM) and corrosion products were characterized by X-ray diffraction (XRD).The effectiveness of antifouling coatings was assessed by means of seawater immersion tests during a time period of 16 months. A coating system based on lamellar zinc and modified with an extender and an inhibitor has been used as primer. This formulation offered an antifouling high dissolution rate and showed the best performance.