crack spacing frequency of chromium oxide in Ringers solution for 1 month

The measured crack spacing obtained from substrate straining was analysed statistically using SPSS software to obtained the frequency distribution of the crack spacing for the films exposed to Ringers solution for 1 month. The observed crack distribution was fitted to the normal, lognormal and weibull probability distribution function. The function that gave the best fit was used to calculate the mean crack spacing of the coatings exposed to Ringers solution.