Peculiarities of Long-Term Effect of Hydrosulfide-Enriched  Seawater on a Copper Alloy

I. E. Zanin, V. Yu. Kondrashin, V. N. Latartsev, and V. V. Chernyshev

Voronezh State University, Universitetskaya pl. 1, Voronezh, 394006 Russia

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Received May 26, 2007

Abstract — Copper specimens (coins) found at the bottom of Taman bay, which lied in water for about 1600years, manifested a very high corrosion resistance. The uniqueness of the phenomenon is attributed to the heightened concentration of hydrogen sulfide caused by the activity of mud volcano in this region. Under the layer of insoluble corrosion products, namely copper sulfides and disulfides, the items preserved the original surface relief.