In-situ X-ray diffraction of corrosion products formed on iron surfaces
In-situ X-ray diffraction of corrosion products formed on iron surfaces
复制标题
DOI：
10.2320/matertrans.46.637
复制
发表时间：
2005-03-01
影响因子：
1.2
通讯作者：
Waseda, Y
中科院分区：
文献类型：
--
作者：
Takahashi, Y;Matsubara, E;Waseda, Y
用同步辐射X射线衍射仪和常规X射线源对纯铁和铁-5质量分数镍合金与含氯化钠或硫酸钠的水溶液反应生成的腐蚀产物进行了原位X射线衍射分析。制备了一种用于腐蚀产物的原位衍射测量的电池。腐蚀产物的衍射图表明，腐蚀产物的主要成分是γ-FeOOH，腐蚀产物中α-FeOOH和Fe3O4的比例取决于腐蚀条件，如润湿和干燥过程、水溶液中的阴离子物种和样品中的镍。铁表面热形成的氧化膜也影响腐蚀产物的形成。
In-situ X-ray diffraction measurements by synchrotron radiation and conventional X-ray source have been carried out for identifying constituent species of corrosion products, which were formed on the surface of a pure iron and an iron-5 mass% nickel alloy by reaction with aqueous solutions containing sodium chloride or sodium sulfate. A cell has been prepared for in-situ diffraction measurements of the corrosion products. Diffraction patterns from the corrosion products showed that major constituent species of the corrosion products was gamma-FeOOH, and the fraction of minor species of alpha-FeOOH and Fe3O4 in the corrosion products depended on corrosion conditions, such as wetting and drying processes, anion species in aqueous solutions and nickel in the sample. An oxide scale thermally formed on the iron surface was also found to affect the formation of corrosion products.