Use of Silica Tubes as Nanocontainers for Corrosion Inhibitor Storage

Figure 10

Power noise impedance spectra for the coating with 5% silica particles without and with 3.1 ppm Fe(NO₃)₃ inhibitor concentration for different times of immersion.

(a) 24 and 72 h

(b) 144 and 168 h

(c) 240 and 268 h

(d) 300 and 360 h