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首页> 外文期刊>Zeitschrift fur Anorganische und Allgemeine Chemie >Electrochemical Behavior of Dental Ni-Cr Wirolloy Coated with Eco-friendly Films in Artificial Saliva
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Electrochemical Behavior of Dental Ni-Cr Wirolloy Coated with Eco-friendly Films in Artificial Saliva

机译：牙科Ni-Cr Wirolloy在人工唾液中涂有环保薄膜的电化学行为

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摘要

The electrochemical corrosion behavior of the non-precious Ni-Cr Wirolloy, being used in dentistry, was investigated before and after applying of two types of eco-friendly coatings, polyvinyl silsesquioxane (PVS) and nano-hydroxyapatite (nHAP) separately in artificial saliva solution at 37 degrees C for 14 d of immersion. The study aimed to investigate the effectiveness of the introduced coating films in enhancing the corrosion resistance of the alloy, and in decreasing the leaching of the toxic Ni ions from the alloy into the environment. The electrochemical corrosion investigation methods used are; open circuit potential (OCP), electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization techniques. The evaluated results revealed that the electrochemically coated alloy with PVS. prepared at cathodic potential showed higher corrosion resistance and more stable film compared to that prepared by conventional dip-coating method. At the same time, the nHAP electrochemically coated film provided the best anti-corrosion properties over all examined time intervals. The obtained results were confirmed via surface analysis, which assured the formation of the prepared coatings on the alloy surface. Chemical analysis of the corrosion product/solutions showed that the effect of electrochemically deposited nHAP and PVS. polymer films in suppression of Ni ions leaching is similar and slightly higher than that of the chemically coated PVS. one; however, all of them are efficient in decreasing the leaching of the risky Ni ions into the solution.
机译：在人工唾液中分别施加两种生态型涂料，聚乙烯倍半硅氧烷（PVS）和纳米 - 羟基磷灰石（NHAP）之前和之后，研究了非珍贵的Ni-Cr Wirolloy的电化学腐蚀行为。溶液在37℃下浸没14 d。该研究旨在探讨引入的涂膜在增强合金耐腐蚀性方面的有效性，以及将毒性Ni离子的浸出从合金中的浸出降低到环境中。使用的电化学腐蚀研究方法是;开路电位（OCP），电化学阻抗光谱（EIS）和电位偏振技术。评价结果表明，电化学涂覆的合金与PVS。与通过常规浸涂法制备的相比，在阴极电位下准备耐腐蚀性和更稳定的薄膜。同时，NHAP电化学涂覆的膜在所有检查的时间间隔内提供了最佳的抗腐蚀性能。通过表面分析证实得到的结果，并确保了在合金表面上形成制备的涂层。腐蚀产品/溶液的化学分析表明，电化学沉积的NHAP和PVS的影响。抑制Ni离子浸出的聚合物膜类似且略高于化学涂覆的PV。一;然而，所有这些都有效地将风险性Ni离子的浸出减少到溶液中。

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