Protection Against Biological Fouling of TB10 Titanium Alloy by Cold - Sprayed Cu (Ag) Coating

For improving the biological fouling resistance of TB10 titanium alloy, copper (Cu) and copper - silver (Cu - Ag) coatings were prepared on its surface by cold spraying. The mass fraction of silver in the powder used for manufacturing Cu - Ag coating was 10%. The phase composition of the coatings was detected by X - ray diffraction. The growth trend of sulfate - reducing bacteria in the solution was characterized by using a spectrophotometer to measure the absorbance at 550 nm. Scanning electron microscopy was used to observe the surface morphology of the coatings immersed in the culture medium of sulfate - reducing bacteria for 3, 7 and 12 days for the purpose of evaluating the biological fouling resistance of the coatings. In addition, the polarization curve of the samples in simulated seawater was tested by electrochemical workstation in order to characterize the corrosion resistance of the coatings. Results showed that in the immersion experiment, the number of bacteria adsorbed on the surface of titanium