List of Figures
xvii
Figure 8.8 Corrosion of steel at breaks in a nickel-chromium
coating when exposed to the atmosphere ......................................................272
Figure 8.9 Duplex nickel electrode deposit to prevent corrosion of
steel substrate. .....................................................................................................272
Figure 8.10 Tin acting as both a noble and sacrificial coating ..................275
Figure 8.11 Potential reversal in tinplate .....................................................275
Figure 8.12 Cathodic control protection ......................................................278
Figure 8.13 Schematic illustration of galvanic action of sacrificial
metal coating ......................................................................................................279
Figure 8.14 Seven-year exposure of Galfan and galvanized steel in a
severe marine atmosphere ................................................................................286
Figure 8.15 Thirteen-year exposure of Galvalume in marine and
industrial atmospheres ......................................................................................288
Figure 9.1 Polarization of copper-zinc cell ................................................299
Figure 9.2 Cathodic protection using impressed current on a local
action cell
.......................................................................................................299
Figure 9.3 Plot of Sunde equation ...............................................................302
Figure 10.1 Polarization curves that show effect of passivator
concentration on the corrosion of iron ............................................................ 312
Figure 10.2 Effect of concentration of organic inhibitors on
corrosion rate ..................................................................................................... 316