PITTING CORROSION OF A DENTAL COPPER ALLOY IN ARTIFICIAL SALIVA
UNGUREANU GINA 1*, MARECI DANIEL 1, AELENEI DELIA 1, MĂRZA ROĆCA JULIA C. 2 (1)TECHNICAL UNIVERSITY âGH. ASACHIâ IAĆI, FACULTY OF INDUSTRIAL CHEMISTRY, B-DUL D. MANGERON, NO. 71A, IAĆI 700050, ROMANIA (2)LAS PALMAS DE GRAN CANARIA UNIVERSITY, SPAIN *CORRESPONDING AUTHOR: E-MAIL: GUNGUREANU@CH.TUIAĆI.RO
The corrosion behaviour of a copper based dental alloy (GAUDENT) in a simulated saliva environment was studied by potentiodynamic polarization and by electrochemical impedance spectroscopy (EIS). It was established that the metallurgical processing (melting in air and manually casting) influences negatively the corrosion resistance. The keeping of this alloy in solution reduces the thermodynamic tendency to corrosion but not influence appreciably the type and intensity of the corrosion. In all cases a pitting corrosion was evidenced.