Mechanisms of the dechlorination of iron archaeological artefacts extracted from seawater

作者：Kergourlay F; Remazeilles C; Neff D; Foy E; Conforto E; Guilminot E; Reguer S; Dillmann Ph; Nicot F; Mielcarek F; Rebiere J; Refait Ph^*

来源：Corrosion Science, 2011, 53(8): 2474-2483.

DOI：10.1016/j.corsci.2011.04.003

• Iron
• SEM
• Rust
• Raman spectroscopy
• X-ray diffraction

Treatments based on the immersion of iron artefacts in NaOH or KOH solutions with or without cathodic polarisation of the metal core, used for conservation purposes, were applied to Gallo-Roman iron ingots excavated from the Mediterranean Sea. The transformation of the initial layer of beta-Fe-2(OH)(3)Cl was followed with time. The resulting phases were characterised by a complete set of multi-scale complementary techniques. It could be demonstrated that the main process involved successively the transformation of beta-Fe-2(OH)(3)Cl into Fe(OH)(2) and the oxidation of Fe(OH)(2) into alpha-/delta-FeOOH and magnetite. Cathodic polarisation accelerated, via migration processes, the removal of chloride ions.

• 出版日期2011-8
• 单位中国地震局