A Theoretical Model for Metal Corrosion Degradation

Figure 3

The range of 𝑀(𝑡)function was estimated based on the designation of (25) and experimental data [17] and using𝜀^𝑓₀=𝜀^𝑀₀≈5.1⋅10⁻²²J value. Simulations were run for different range of 𝑀(𝑡) function and for different values of 𝑘_𝑀𝑁_𝑖𝑚 parameter. Figures (a) & (b) indicate pit radii time profile for range of 𝑀(𝑡)∈[10⁻²⁷,10⁻²⁶] and𝑀(𝑡)∈[10⁻²⁵,10⁻²²], respectively. Estimation intervals of 𝑀(𝑡) functions were taken by calculations based on given by standard tables of chemical potentials for solutions and for free energy per atoms, 𝑘_𝑀𝑁_𝑖𝑀~10^-8 which was estimated based on (30). Figures (c) & (d) indicate pit radii time profile for fixed range of 𝑀(𝑡) functions 𝑀(𝑡)∈[10⁻²⁷,10⁻²⁶] but for different𝑘_𝑀𝑁_𝑖𝑀 parameter, 𝑘_𝑀𝑁_𝑖𝑀~10^-7 and 𝑘_𝑀𝑁_𝑖𝑀~10^-9, respectively.

(a)

(b)

(c)

(d)