A mossbauer spectroscopy study of the corrosion products formed at an iron surface in soil

摘要

The structural and phase composition of corrosion scale formed in soil on a nail of archaeological origin were investigated layer by layer using the methods of Mossbauer spectroscopy, X-ray diffraction, thermomagnetic and chemical analysis. The following iron compounds were determined: Fe_3O_4, α-Fe_2O_3 (<50 and -150 A different dispersed stages), FeS_2, FeOOH, FeSO_4x3H_2O, FeCl_2x2H_2O, Fe_3(PO_4)_2x8H_2O and Fe(CO)_3. Near the iron core, crystallized iron oxides, such as magnetite (Fe_3O_4) and hematite (Fe_2O_3) are predominant; on approaching the surface of the sample, the quantity of magnetite diminishes and virtually disappears.