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.

中文翻译：

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TA10在可口可乐含口腔环境中的被动性能

目的

目前，碳酸饮料如可乐尤其受到年轻一代的青睐。但是由于其酸，它经常导致牙齿脱矿质，导致“可乐齿”。然而，可乐对TiA10合金修复材料钝化膜耐蚀性的影响鲜有报道。这项研究的目的是分析不同浓度的可乐中TA10合金的钝化膜的耐蚀性和组成。

设计/方法/方法

通过电位动力学极化，电化学阻抗谱，循环伏安法，Mott-Schottky技术以及X射线光电子能谱和俄歇电子能谱（AES）表面分析研究TA10合金在人工唾液（AS）和可乐中的被动行为。 。

发现

随着可乐含量的增加，合金的自腐蚀电流密度急剧增加，钝化膜的耐蚀性在AS中最好，而可乐中的Rp降低到AS中的一半。AS，AS +可乐和可乐中无源膜的厚度分别约为9.5 nm，7.5 nm和6 nm。可乐中的无源膜有更多的缺陷，载流子密度是AS中的1.55倍。可乐可削弱被保护氧化物的形成过程，促进高价钛氧化物的形成并增加钝化膜中钼氧化物的含量。

创意/价值

这些结果对于在复杂的口腔环境中安全使用合金具有重要的指导意义。