Oxide Coating in the Conservation of Metal Monuments: The Column of King Sigismundus III Waza in Warsaw

Socha, J.; Lesiak, Marian; Safarzyński, Sƚawomir; Lesiak, Krzysztof; Safarzynski, Slawomir

doi:10.2307/1505911

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1993

1997

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“…Formulae for reddish patinas are given in Hughes and Rowe [9], while deliberate oxidation patinas of cuprite have been used by Socha for the protection of the column of King Sigismund III in Warsaw [10]. A copper(I) oxide patina was obtained, after cleaning, by use of a solution of 5g ammonium persulphate, 50g sodium hydroxide and 5g of mercuric chloride in 950ml water, kept at 60°C and applied for one hour to the metal surface in three to five operations.…”

Section: Da Scottmentioning

confidence: 99%

Copper compounds in metals and colorants: oxides and hydroxides

Scott¹

1997

Studies in Conservation

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Cuprite and tenorite are important as corrosion products of copper and as alteration products or colorants. In the case of tenorite this alteration is usually undesirable, resulting from degradation of azurite or decomposition of copper(I) chloride (cuprous chloride) under very alkaline conditions. The mode of occurrence of cuprite in ancient bronzes is reviewed. The use of cuprite as a pigment in ancient glasses is discussed and the intermediate compound, copper(II) hydroxide (cupric hydroxide), is briefly described.

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Section: Da Scottmentioning

confidence: 99%