Comparative Study on the Corrosion Resistance of CAD/CAM and Conventional Processed Co-Cr Dental Alloys in NaCl Solutions

Costea, L. V.; Dan, Mircea Laurențiu; Savencu, Cristina; Porojan, Liliana

doi:10.1088/1757-899x/416/1/012047

Cited by 1 publication

(1 citation statement)

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“…The standard electrode potential of titanium is relatively low, a dense, strong adhesion and good stability oxide film can quickly be formed on the surface of alloy when it is in the air or some oxygen-containing media, which is not easily damaged, thus it plays a very good role in protecting the titanium substrate from corrosion. To today, there have been lots of studies on Ti and its alloys in oral restoration and implantation (Zhang et al, 2020;Costea et al, 2018;Grossi et al, 2018;Al-Mashhdani, 2018). Because of the complex of the oral environment, Ti and its alloys are prone to corrosion due to chemical or electrochemical action.…”

Section: Introductionmentioning

confidence: 99%

The passive properties of TA10 in Coca-Cola containing oral environment

Liu

Dan-ping³

et al. 2020

ACMM

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Purpose At present, carbonated drinks such as cola are especially favored by the younger generation. But because of its acid, it often leads to tooth demineralization, resulting in “cola tooth”. However, the influence of cola on the corrosion resistance of passive film of TiA10 alloy restorative materials is rarely reported. The purpose of this study was to analysis the corrosion resistance, composition of the passive film of TA10 alloy in different concentrations of Cola. Design/methodology/approach The passive behavior of TA10 alloy in artificial saliva (AS) and Cola was studied by means of potentiodynamic polarization, electrochemical impedance spectroscopy, cyclic voltammetry, Mott-Schottky techniques and combined with X-ray photoelectron spectroscopy and Auger electron spectroscopy (AES) surface analysis. Findings With the increase of cola content, the self-corrosion current density of the alloy increases sharply, and the corrosion resistance of the passive film is the best in AS, while Rp in cola is reduced to half of that in AS. The thickness of the passive film in AS, AS +cola and cola is about 9.5 nm, 7.5 nm and 6 nm, respectively. The passive film in cola has more defects and the carrier density is 1.55 times as high as that in AS. Cola can weaken the formation process of the protected oxide, promote the formation of high valence Ti-oxides and increase the content of Mo-oxides in the passive film. Originality/value These results have important guiding significance for the safe use of the alloy in the complex oral environments.

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Section: Introductionmentioning

confidence: 99%