采用电子天平和交流阻抗法在湿干变化环境中原位监测了碳钢双电极体系电化学阻抗谱,并研究了其大气腐蚀初期阻抗谱的演化规律.结果表明,薄液膜较厚时,可以利用简单的传输线模型对电化学阻抗谱进行最小二乘法拟合.薄液膜减薄至128 μm以下时,阻抗谱出现Warburg阻抗.当电极表面的薄液膜减薄至不连续时,在腐蚀初期表面没有腐蚀产物的条件下,两电极间的溶液电阻急剧增大,干燥后变为两电极间填充的绝缘材料的电阻.
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