该文件规定了一种电化学测量耐候钢合金上形成的锈层的离子转移阻力的方法，以便评估其此后的防腐性能[3]。该方法使用电化学交流阻抗测量[4][5][6][7][8]以及谐波分析来识别离子转移电阻，并使用锈厚度测量来表征保护性锈层在使用环境下的腐蚀保护方面的稳定性。

This document specifies a method for the electrochemical measurement of ion transfer resistance of the rust layer formed on weathering steel alloys in order to assess their protective properties against corrosion thereafter^[3]. This method uses an electrochemical AC impedance measurement^{[4][5][6][7][8]}_, together with harmonic analysis, to identify the ion transfer resistance, and a rust thickness measurement to characterize the stability of the protective rust layer in terms of corrosion protection under used environments.