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首页> 外文期刊>Corrosion science >Environmental factors affecting the corrosion behavior of reinforcing steel Ⅲ. Measurement of pitting corrosion currents of steel in Ca(OH)_2 solutions under natural corrosion conditions
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Environmental factors affecting the corrosion behavior of reinforcing steel Ⅲ. Measurement of pitting corrosion currents of steel in Ca(OH)_2 solutions under natural corrosion conditions

机译：影响钢筋Ⅲ腐蚀行为的环境因素。自然腐蚀条件下Ca（OH）_2溶液中钢点蚀电流的测量

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Using a simple electrolytic cell, the pitting corrosion current of reinforcing steel is measured in Ca(OH)_2 solutions in presence of chloride and sulfate as aggressive ions. Pitting corrosion current starts to flow after an induction period which depends on the concentration of both the aggressive and the passivating anions. The pitting corrosion current densities reach steady-state values which depend also on the type and concentration of the corrosive and passivating anions. The corrosive action of the aggressive species decreased in the order: SO_4~(2-) > Cl~-. Corrosion of the steel is found to be governed by a single electron transfer reaction. Raising the temperature decreases the induction period associated with pit initiation and increases the corrosion current associated with pit propagation. From Arrhenius plots, the activation energies for both pit initiation and pit propagation in presence of chloride and sulfate ions are calculated.
机译：使用简单的电解池，在氯化物和硫酸盐作为侵蚀性离子存在的情况下，在Ca（OH）_2溶液中测量钢筋的点蚀电流。点蚀腐蚀电流在感应期后开始流动，感应期取决于侵蚀性和钝化阴离子的浓度。点蚀电流密度达到稳态值，该值还取决于腐蚀性和钝化阴离子的类型和浓度。侵蚀性物质的腐蚀作用依次降低：SO_4〜（2-）> Cl〜-。发现钢的腐蚀由单个电子转移反应控制。升高温度会减少与凹坑萌生相关的感应时间，并增加与凹坑传播相关的腐蚀电流。从Arrhenius曲线中，可以计算出在存在氯离子和硫酸根离子的情况下，坑引发和坑传播的活化能。

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