This paper reports on a methodological study carried out in order to propose a cleaning procedure to remove stains produced by bronze corrosion products on surface of limestone (namely travertine); the procedure is effective and more environmentally friendly than the methods commonly used today. Several copper complexing or chelating agents were considered, including three amino acids and compared with some ion exchange resins. After a first laboratory phase on pure copper products and on artificially stained quarry samples, the optimized procedure was tested on the pedestal of a bronze statue in the Sapienza campus, in Rome. Colorimetry and ICP/OES were used to evaluate the efficiency of the cleaning procedure. © 2011 Elsevier Ltd.
A new method to remove copper corrosion stains from stone surfaces / A., Macchia; Sammartino, Maria Pia; LAURENZI TABASSO, Marisa. - In: JOURNAL OF ARCHAEOLOGICAL SCIENCE. - ISSN 0305-4403. - STAMPA. - 38:6(2011), pp. 1300-1307. [10.1016/j.jas.2011.01.005]
A new method to remove copper corrosion stains from stone surfaces
SAMMARTINO, Maria Pia;LAURENZI TABASSO, marisa
2011
Abstract
This paper reports on a methodological study carried out in order to propose a cleaning procedure to remove stains produced by bronze corrosion products on surface of limestone (namely travertine); the procedure is effective and more environmentally friendly than the methods commonly used today. Several copper complexing or chelating agents were considered, including three amino acids and compared with some ion exchange resins. After a first laboratory phase on pure copper products and on artificially stained quarry samples, the optimized procedure was tested on the pedestal of a bronze statue in the Sapienza campus, in Rome. Colorimetry and ICP/OES were used to evaluate the efficiency of the cleaning procedure. © 2011 Elsevier Ltd.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.