对MGO/磁石砂的耐用性评估-对化物和腐蚀的耐受性
Fabio Enrico Furcas1,2, Alexander German1,2, Frank Winnefeld2
1ETH Zürich, Institute for Building Materials, 8093 Zurich, Switzerland.
概括
这项研究研究了MgO/磁石砂的耐用性和耐腐蚀性. 结果显示,水分,而不是化物,主要影响这些结合剂中的碳钢腐蚀,这表明它们适合特定的应用.
科学领域:
- 材料科学 材料科学 材料科学
- 腐蚀工程 腐蚀工程
- 建筑材料 建筑材料
背景情况:
- 氧化 (MgO) 和磁石结合剂为耐用建筑材料提供了潜力.
- 了解它们在腐蚀性环境中的性能,特别是化物攻击和水分,对于实际应用至关重要.
- 评估嵌入式碳钢的防腐蚀性能对于结构完整性至关重要.
研究的目的:
- 为了评估MGO/磁石砂的耐用性和腐蚀性能.
- 为了研究这些迫击炮对化物入侵和攻击的抵抗力.
- 在不同的湿度条件下确定嵌入式碳钢的腐蚀率.
主要方法:
- 用快速化物入试验测量了化物迁移系数.
- MgO/磁石糊被暴露在化溶液中,以研究Mg-化的形成.
- 嵌入式碳钢的腐蚀率通过在干燥和潮湿条件下的线性极化阻力测量来确定.
主要成果:
- 化物迁移系数在1×10−13到1×10−12 m2/s之间.
- 在化溶液中固化的面粉中没有观察到Mg-化阶段.
- 碳钢的腐蚀率为1 × 10−9 A/cm2 (干) 和1 × 10−7 A/cm2 (湿),不论是砂组成或固化.
结论:
- 湿度条件是影响MgO/磁石结合物的碳钢腐蚀的主要因素,特别是在没有化物的情况下.
- 观察到的低化物迁移和缺乏Mg-化物形成表明它对化物攻击有很好的抵抗力.
- MgO/磁石结合剂在特定的,相关的暴露条件下显示出保护嵌入式碳钢的潜力.
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