Critical factors affecting the high-temperature corrosion performance of iron aluminides
Critical factors affecting the high-temperature corrosion performance of iron aluminides
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DOI：
10.1016/s0921-5093(98)00924-1
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发表时间：
1998-12
期刊：
影响因子：
6.4
通讯作者：
P. Tortorelli;K. Natesan
中科院分区：
文献类型：
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作者：
P. Tortorelli;K. Natesan
已知铁铝化物在许多高温环境中表现出良好至优异的耐腐蚀性。在大多数情况下，这种阻力来自建立和维护一个健全的和粘附的氧化铝层。因此，铁铝化合物在不同侵蚀性高温下的性能可以与影响保护性氧化铝的形成、附着力和耐久性（寿命）的基本因素相关。整体耐腐蚀性不仅取决于反应产物在特定环境中的热力学稳定性及其生长动力学，而且还取决于氧化物-金属界面的完整性和形态、化学和物理性质、合金强度以及铁铝化物的具体组成。尽管影响因素众多，但基于铝消耗量的相对简单的寿命预测模型可用于评估材料参数变化的影响，并确定提高铁铝化合物高温耐腐蚀性的方法。
Iron aluminides are known to exhibit good-to-excellent corrosion resistance in a number of high-temperature environments. Under most conditions, this resistance derives from the establishment and maintenance of a sound and adherent alumina layer. Consequently the performance of iron aluminides under different aggressive high-temperature can be related to fundamental factors that affect the development, adhesion, and durability (lifetime) of protective alumina. Overall corrosion resistance depends not only on thermodynamic stability of the reaction product in a particular environment and its growth kinetics, but also on scale integrity and morphology, the chemical and physical nature of the oxide–metal interface, alloy strength, and the specific composition of the iron aluminide. Despite the multiplicity of factors, a relatively simple lifetime prediction model based on aluminum consumption can be used to evaluate the influences of changes in material parameters and to determine approaches to improving high-temperature corrosion resistance of iron aluminides.