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首页> 外文期刊>International Journal of Electrochemical Science >Electrochemical Corrosion Behavior of a Co20Cr Alloy in Artificial Saliva.
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Electrochemical Corrosion Behavior of a Co20Cr Alloy in Artificial Saliva.

机译：Co20Cr合金在人工唾液中的电化学腐蚀行为。

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摘要

The corrosion behavior of Co20Cr (at. %) together with 316L stainless steel (SS) in artificial salivasolution during nine immersion days at room temperature have been studied and assessed by means ofelectrochemical techniques. Techniques included potentiodynamic polarization curves, electrochemicalimpedance spectroscopy (EIS) and linear polarization resistance (LPR) measurements. Results haveshown that the corrosion rate of Co20Cr alloy resulted higher as compared with that of stainless steel316L biomaterial, using polarization curves. Besides, corrosion potential of Co-20Cr alloy resultedmore active. 316 L stainless steel exhibited a more defined passivation zone, while the Co20Cr alloyexhibited a pseudo-passivation zone. Although the pitting potential of binary alloy is higher. Themeasured values of Rp at the end of the exposure time are related to a higher stability of the filmcomposed by the corrosion products formed on Co20Cr alloy as compared with those of the 316 L SS,which is related to a minor corrosion rate of the CoCr alloy after the third day of immersion. Corrosionbehavior is explained in terms of the stability of the corrosion products formed film.
机译：通过电化学技术研究和评估了Co20Cr（at。％）与316L不锈钢（SS）在室温下浸泡9天期间在人工唾液中的腐蚀行为。技术包括电位动力学极化曲线，电化学阻抗谱（EIS）和线性极化电阻（LPR）测量。结果表明，利用极化曲线，Co20Cr合金的腐蚀速率比不锈钢316L生物材料高。此外，Co-20Cr合金的腐蚀电位更活跃。 316 L不锈钢表现出更明确的钝化区，而Co20Cr合金表现出拟钝化区。尽管二元合金的点蚀电位较高。与316 L SS相比，在暴露时间结束时Rp的测量值与Co20Cr合金上形成的腐蚀产物组成的膜的稳定性更高有关，这与CoCr合金的轻微腐蚀速率有关。浸入第三天后。用腐蚀产物形成的膜的稳定性来解释腐蚀行为。

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