Effect of Nanoalumina on the Electrochemical and Mechanical Properties of Waterborne Polyurethane Composite Coatings

Figure 2

SEM micrographs of unexposed samples: (a) neat WPUD, (b) WPUD + 0.1% nano-Al₂O₃, and (c) WPUD + 1.0% nano-Al₂O₃.

(a)

(b)

(c)