采用电位-电容法及Mott-Schottky分析技术研究了自腐蚀电位条件下304不锈钢钝化膜在酸、碱性溶液中的半导体导电行为。研究表明，304不锈钢钝化膜在不同溶液体系中表现出不同的导电特征，在5‰H2SO4溶液中，呈现两个空间电荷层，扫描电位低于0 VSCE，钝化膜呈现p型半导体导电特征。而扫描电位大于0 VSCE，钝化膜呈现n型半导体导电特征。钝化膜在5%NaOH溶液中呈现p型半导体导电特征。在不同溶液中载流子浓度随着浸泡时间的延长变化不大。
The semiconducting behavior of 304 stainless steel in acid and base solution was studied by utilizing potential-capacitance and Mott-Schottky analysis. It was pointed out that conducting behaviour of 304 stainless steel in different solution was different. The stainless steel showed double layer of space charge layer in 5‰ sulfuric acid, below 0 VSCE, the steel electrode showed p-type semiconducting behaviour, above 0 VSCE, the steel electrode showed n-type semiconducting behaviour. However, in 5% sodium hydroxide, the electrode showed p-type semiconducting behaviour.With increasing immersion time, the density of charge carriers in different solution changed slightly.
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