Corrosion of galvanic couples of stainless steels with non-precious alloys in the oral cavity

IF 0.5 4区 材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY
Elvar Quezada-Castillo, Wilder Aguilar-Castro, Bertha Quezada-Alván
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引用次数: 0

Abstract

In the restoration of lost or misaligned dental pieces, dissimilar dental alloys are frequently used in the oral cavity, which form galvanic couples that corrode due to the effect of saliva and dentin fluids. In this work, the microstructure of ten non-precious dental alloys was analyzed by optical microscopy, the open-circuit corrosion potential of each alloy was measured against a saturated calomel electrode, they were subjected to accelerated corrosion processes in aerated artificial saliva and plotted the potentiodynamic polarization curves of these alloys. Then, the corrosion potential and current density of the galvanic couples formed by stainless steels 304 and 316L with non-precious dental alloys of Ni-Cr, Co-Cr, and Cu base alloys (Cu-Ni, Cu-Zn and Cu-Al), using the Evans method whose results were not compatible with the principle of galvanic couples, so the Mansfeld equations were used with which results consistent with the aforementioned principle were obtained.
不锈钢与非贵重合金的电偶在口腔中的腐蚀
在修复丢失或错位的牙块时,经常在口腔中使用不同的牙科合金,这些合金形成电偶,由于唾液和牙本质液体的作用而腐蚀。在光学显微镜下分析了10种非贵重牙科合金的微观结构,在饱和甘汞电极上测量了每种合金的开路腐蚀电位,并在充气人工唾液中进行了加速腐蚀过程,绘制了这些合金的动电位极化曲线。然后用非贵重牙科合金Ni-Cr、Co-Cr和Cu基合金(Cu- ni、Cu- zn和Cu- al)对304和316L不锈钢进行腐蚀电位和电流密度的计算,采用Evans法,其结果不符合电偶原理,因此采用Mansfeld方程,得到符合上述原理的结果。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Materia-rio De Janeiro
Materia-rio De Janeiro MATERIALS SCIENCE, MULTIDISCIPLINARY-
CiteScore
1.00
自引率
25.00%
发文量
51
审稿时长
6 weeks
期刊介绍: All the articles are submitted to a careful peer-reviewing evaluation process by the journal''s Editorial Board. The Editorial Board, reviewers and authors make use of a web based proprietary automated tool to deal with the reviewing procedures.the Revista Matéria''s article reviewing restricted access system - SEER. Authors are not informed about the identity of the reviewers.
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