Identification of Corrosion Products Due to Seawater and Fresh Water
Identification of Corrosion Products Due to Seawater and Fresh Water
复制标题
海水和淡水腐蚀产物的鉴定
DOI：
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
A. Rais
中科院分区：
文献类型：
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作者：
A. Gismelseed;M. Elzain;A. Yousif;A. Al Rawas;I. Al;H. Widatallah;A. Rais
穆斯堡尔谱和X射线衍射（XRD）的测量进行了腐蚀产物提取的内表面的两个不同的金属管在阿曼的海水淡化厂。其中一根管子被海水腐蚀，另一根管子被淡水腐蚀。由此产生的腐蚀产物由于海水被刮落成两层，从顶部容易去除的锈被称为外表面腐蚀产物，而强烈粘附的锈被称为内腐蚀产物。外表面的穆斯堡尔谱和XRD图谱显示存在磁铁矿（Fe 3 O 4）、赤霞铁矿（β-FeOOH）、纤铁矿（γ-FeOOH）、针铁矿（α-FeOOH）和赤铁矿（Fe 2 O3）。然而，内表面显示出存在阿干石、针铁矿和磁铁矿。另一方面，由于淡水的腐蚀产物仅显示针铁矿和磁铁矿的存在。根据海水和淡水腐蚀产物中铁组分形成的显著差异，讨论了腐蚀过程的机理。
Mössbauer and X-ray diffraction (XRD) measurements were performed on corrosion products extracted from the inner surface of two different metal tubes used in a desalination plant in Oman. One of the tubes corroded due to the seawater while the second was corroded due to fresh water. The corrosion products thus resulted due to seawater were scrapped off in to two layers, the easily removable rust from the top is termed outer surface corrosion product and the strongly adhered rust as internal corrosion product. The Mössbauer spectra together with the XRD pattern of the outer surface showed the presence of magnetite (Fe3O4), akaganeite (β-FeOOH), lepidocrocite (γ-FeOOH), goethite (α-FeOOH) and hematite (Fe2O3). The inner surface however showed the presence of akaganite, goethite, and magnetite. On the other hand, the corrosion products due to the fresh water showed only the presence of goethite and magnetite. The mechanism of the corrosion process will be discussed based on the significant differences between the formation of the iron components of the corrosion products due to seawater and the fresh water.