根据钢铁材料在不同湿度的沈阳、大港和鹰潭三种类型土壤介质中的电化学阻抗谱特征，提出了土壤腐蚀的等效电路模型；同时讨论了湿度对钢铁土壤腐蚀电化学行为的影响。
Based on the EIS displays of carbon steel in three types of soil with different moisture contents at various time, the corresponding equivalent circuits were proposed respectively. The characteristics of EIS for carbon steel/soil system relate to soil corrosion morphology. When different carbon steel/soil systems have identical corrosion morphology, the characteristics of their EIS are similar. EIS of local corrosion is composed of two capacitive semi-circles and includes inductive are or diffusion impedance occasionally. Diffusion impedance is only a line without 45 because of dispersion effect. EIS of uniform corrosion is composed of a single capacitive are which includes two time constants. At the same time, the influence of moisture content on the corrosion behaviour of carbon steel in different soils was discussed.
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