Macrocell corrosion of steel in concrete: Characterization of anodic behavior in relation to the chloride content,Materials and Corrosion

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Macrocell corrosion of steel in concrete: Characterization of anodic behavior in relation to the chloride content
Materials and Corrosion ( IF 1.6 ) Pub Date : 2020-03-19 , DOI: 10.1002/maco.201911398
Chantal Chalhoub ₁ , Raoul François ₁ , David Garcia ₁ , Stephane Laurens ₁ , Myriam Carcasses ₁

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This study presents the determination of electrochemical properties of active steel in mortar, based on inverse numerical modeling that focuses on their dependency on chloride content. An experimental campaign, consisting of galvanic coupling tests between anode samples contaminated with different chloride concentrations and cathode samples without chlorides, was carried out. Cathode polarization tests allowed for directly determining passive steel electrochemical parameters. Anode polarization tests coupled with a numerical optimization were then performed for quantifying active steel parameters and focusing on chloride's effect on the iron anodic Tafel coefficient. Furthermore, the steel electrochemical properties were successfully used as input parameters to model the galvanic experiments.

中文翻译：

混凝土中钢的宏胞腐蚀：与氯化物含量有关的阳极行为表征

这项研究提出了基于灰泥中活性钢电化学性能的测定方法，该方法基于侧重于氯离子含量的逆数值模拟。进行了一项实验活动，包括在受不同氯化物浓度污染的阳极样品与不含氯化物的阴极样品之间进行电流耦合测试。阴极极化测试可直接确定被动钢的电化学参数。然后进行阳极极化试验和数值优化，以量化钢的活性参数，并关注氯化物对铁阳极塔菲尔系数的影响。此外，钢的电化学性能已成功用作模拟电实验的输入参数。

更新日期：2020-03-19

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