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JOM

, Volume 71, Issue 2, pp 779–783 | Cite as

The Effect of Pseudomonas fluorescens on the Corrosion Morphology of Archaeological Tin Bronze Analogues

  • G. GhiaraEmail author
  • L. Repetto
  • P. Piccardo
Technical Article: Archaeomaterials
  • 43 Downloads

Abstract

This work focuses on the localized forms of corrosion caused by microbiological activity, which have seldom been considered for long-term alteration processes of copper-based alloys. To reproduce a seldom-documented corrosion morphology found in some archaeological objects, called ‘tentacle like’, a Pseudomonas fluorescens strain was used on analogues of known composition in a solution containing sulfates, carbonates, nitrates and chlorides. The effect of such bacteria has already been assessed in a previous study, and a localized type of corrosion was defined. The results show that, when a biofilm grows on the surface of the samples, pits are observed under the corrosion products, while in the presence of chloride ions, these pits propagate under the metallic surface and into the matrix, forming uncommon morphologies ascribed to the type “tentacle like”.

Notes

Acknowledgement

We thank American Journal Experts (AJE) for English language editing.

Supplementary material

11837_2018_3138_MOESM1_ESM.pdf (475 kb)
Supplementary material 1 (PDF 474 kb)

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Copyright information

© The Minerals, Metals & Materials Society 2018

Authors and Affiliations

  1. 1.Dipartimento di Chimica e Chimica Industriale - DCCIUniversità degli Studi di GenovaGenoaItaly
  2. 2.Dipartimento di Fisica – DIFIUniversità degli Studi di GenovaGenoaItaly

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