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.

采用SPSS软件（SPSS）对通过基底应变测试得到的实测裂纹间距开展统计分析，以获取暴露于林格液（Ringer's solution）中1个月的薄膜的裂纹间距频率分布。将观测得到的裂纹分布分别拟合至正态分布（normal distribution）、对数正态分布（lognormal distribution）与威布尔分布（Weibull distribution）三种概率分布函数，选取拟合效果最优的分布函数，计算暴露于林格液中的涂层的平均裂纹间距。