Passivation of Hydrated Cement
Passivation of Hydrated Cement
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DOI：
10.1021/acssuschemeng.7b03045
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发表时间：
2018-01
影响因子：
8.4
通讯作者：
Nicolás Giraudo;J. Wohlgemuth;Samuel Bergdolt;M. Heinle;P. Thissen
中科院分区：
文献类型：
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作者：
Nicolás Giraudo;J. Wohlgemuth;Samuel Bergdolt;M. Heinle;P. Thissen
界面现象是每个腐蚀反应的起点。在这项工作中，水对水化硅酸钙（C-S-H）相的腐蚀进行了研究，以硅片为衬底。通过在受控气氛中合成样品，避免了这些相的碳酸化。这些矿物表面的钝化是材料可持续性的重要一步。这里介绍了四种不同分子的表面涂层：碳酸化、硅酸钠层、原硅酸四乙酯（TEOS）和十八烷基膦酸（ODPA）单层。通过红外光谱、电感耦合等离子体发射光谱、水接触角和pH值的测量，对每种技术的抗水腐蚀性能进行了评价。由于水中质子浓度是该腐蚀过程中的相关参数，因此在实验中分析了三个不同的值。通过对钝化工艺的比较，得出了钝化工艺简单、成本低的结论。
Interface phenomena are the starting point for every corrosion reaction. In this work, the corrosion of calcium–silicate–hydrate (C–S–H) phases by water is investigated by implementing silicon wafers as substrates. The carbonation of these phases was avoided by synthesizing the samples in a controlled atmosphere. The passivation of these mineral surfaces is a significant step for materials sustainability. The coating of the surfaces with four different molecules is presented here: carbonation, sodium silicate layers, tetraethyl orthosilicates (TEOS), and octadecylphosphonic acid (ODPA) monolayers. The performance of every technique against corrosion by water is evaluated by infrared spectroscopy, inductively coupled plasma optical emission spectroscopy, water contact angle, and pH measurements. Since the concentration of protons in water is the relevant parameter in this corrosion process, three different values were analyzed at the experiments. After comparing the passivation techniques, the results obta...