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Abstract

HIGUERA COBOS, OSCAR FABIÁN; FLOREZ GARCIA, LUIS CARLOS  and  PENA BALLESTEROS, DARIO YESID. STUDY OF CHEMICAL POLISHING PROCESS JEWELLER`S PIECES. Dyna rev.fac.nac.minas [online]. 2009, vol.76, n.158, pp.79-88. ISSN 0012-7353.

In this investigation work the fundamental aspects were studied at electrochemical, kinetic and thermodynamic level of the process of chemical polishing (Bombing process) with the purpose of determining the favorable conditions and then standardization of the process of chemical polishing. The “Bombing“ process behavior of 24 and 18 carat gold has been investigated using cyclic voltammetry techniques using a rotating disc electrode. Electrochemically was determined the best operation conditions for the process of chemical polishing of jeweler's pieces: 0.1M NaCN, 0.95M H2O2, 0 rpm and 85ºC

Keywords : 24 carat gold; 18 carat gold; hydrogen peroxide; chemical polishing; cyanide; voltammetry cyclic; rotating disc electrode (RDE).

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