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Linear sweep voltammetry: a cheap and powerful technique for the identification...
Capelo, Sofia; Menino Homem, P.; Cavalheiro, J.; Fonseca, I.T. E.The potentialities of linear sweep voltammetry (LSV) for the characterization of the tarnish layer formed on pure and sterling silver samples exposed in the chapel and in the museum, at the Cathedral of Porto, in Portugal, are well demonstrated in this study. The technique allows the identification of the constituents of the thin tarnishing layers and also its relative abundance. A much more complex composition...
Controlling pollution effects on metallic cultural heritage using linear sweep ...
Capelo, Sofia; Menino Homem, P.; Cavalheiro, J.; Fonseca, I. T. E.This work demonstrates the potentialities of the linear sweep voltammetry (LSV) for monitoring the composition of the tarnishing layers formed on silver and on the silver-copper alloys exposed to atmospheres contaminated with pollutants, such as H2S and chloride ions, among others. A collection of silver and sterling silver coupons exposed during periods of 1 and 12 months, at the Holy Altar of the Chapel and a...
Monitoring Corrosion Products on Metal Artefacts by Linear Sweep Voltammetry (LSV)
Capelo, Sofia; Homem, P.; Cavalheiro, J.; Fonseca, I.T.E.Metallic surfaces are highly sensitive to their surroundings, and prone to react with airborne pollutants to form complex layers. Electrochemical techniques have the possibility of simultaneously identifying different electroactive compounds [1]. The high sensitivity of Linear Sweep Voltammetry (LSV) allows the detection of extremely thin surface films before they became visible. LSV leads to reduction peaks, w...
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