Salvia Officinalis Extract as a Natural Corrosion Inhibitor for Copper Alloy Artifacts Treatment

In this paper an attempt to looking for a safe, effective and enviromental friendly inhibitory compound. The aim of present work is to study a new corrosion inhibitor for treatment of historical copper artifacts with no changes and damages to patina.On this basis, according to studies, a new non-toxic inhibitory solution extracted from garden sage (Salvia officinalis) and then its efficiency was investigated in 0.5 M Nacl.Electrochemical measurement, weight loss studies were carried out to evaluate the performances of this compound. Next it was used for treatment of bronze diseases in some copper alloy artifacts with regard to treatment policies.Then the evaluation of patina changes in historical samples was performed. For this purpose optical densitometry on patina, optical microscope (OM), scanning electron microscope (SEM) and Energy-dispersive X-ray spectroscopy (EDX) were applied. The results showed good inhibition property of this solution.