Corrosion and Algal Adhesion Behaviors of HVOF-Sprayed Fe-Based Amorphous Coatings for Marine Applications

In this study, Fe-based amorphous/nanocrystalline coatings consisting of Fe 53 Cr 19 Zr 7 Mo 2 C 18 Si were fabricated by high-velocity oxy-fuel spray. For comparative study, further crystallization annealing treatment at 750 °C was carried out for the coatings. The microstructure, corrosion resistance and algal adhesion behaviors of the as-sprayed and annealed coatings were systematically investigated by scanning electron microscopy, x-ray diffraction, transmission electron microscopy, electrochemical testing and laser confocal scanning microscopy, respectively. Results show that the as-sprayed coatings exhibited excellent corrosion resistance and decreased algal adhesion, while the annealed coatings displayed compromised anti-corrosion performances, but significantly inhibited the adhesion of typical algae Phaeodactylum tricornutum .