Méthodes de conservation d'objets de fouilles en fer. Etude quantitative comparée de l'élimination des chlorures

Abstract

The Laboratory of the Musée d'art et d'histoire, Geneva, has been concerned with the problem of conserving excavated iron objects, often very corroded. In the search for a satisfactory method of desalination, the alkaline sulphite treatment developed by North and Pearson for marine objects was studied. Within the framework of a quantitative study of chloride elimination, this was compared with five other methods. Further researches were undertaken on the quantitative distribution of chlorides in a corroded iron object, the quantity of chlorides remaining after different treatments, the chloride concentration threshold at which corrosion starts and becomes dangerous.

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