applied fracture mechanics

242Applied Fracture MechanicsFigure 8. Amount of dissolved material per pit as a function of polarization time for a 304 stainless steelin 3.5% wt NaCl solution (=55.8 mS /cm) and in natural seawater (=50.6 mS /cm).Figure 9. Maximum Pit Depth, as a function of pit growth time, for a 304L stainless steel in electrolytesof different conductivity.From fitting of these relationships, represented by solid and dotted line, was obtained theempirical equation for the pits growth law for each experimental condition, which has theshape of an exponential equation [55]:tp (8)P a bcWhere Pp represents the pit depth in m, and t is the pit growth time in minutes. The valuesof the constants for the equation 8 are presented in Table 2.