Abstract
To evaluate, for the first time, the effect of the Moroccan Miswak (Salvadora persica) extract on the corrosion behavior of Ni–Cr dental alloy in artificial saliva, the electrochemical techniques, such as Inductively Coupled Plasma Atomic Emission Spectrometry (ICP-AES), surface analysis, and metal release were investigated. Data extracted from the obtained electrochemical corrosion tests demonstrated that the resistance to corrosion of Ni–Cr alloy was improved in presence of Miswak extract at various concentrations, due to the protective action created by the adsorption of Miswak extract on the Ni–Cr alloy surface; the concentration of 1000 ppm presents a corrosion inhibition efficiency of 87%. In presence of the Miswak extract, the SEM–EDS and XRD studies confirm the formation of a film on Ni–Cr dental alloy surface and revealed a reduction in the relative dominance of Ni and Cr on the alloy surface. Also the release of Ni, Cr, and Mo ions has been obviously decreased.
Published Version
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