Galvanic corrosion between dental precious alloys and magnetic stainless steels used for dental magnetic attachments
Galvanic corrosion between dental precious alloys and magnetic stainless steels used for dental magnetic attachments
复制标题
DOI：
10.4012/dmj.27.237
复制
发表时间：
2008-03-01
影响因子：
2.5
通讯作者：
Okuno, Osamu
中科院分区：
文献类型：
--
作者：
Takahashi, Noriko;Takada, Yukyo;Okuno, Osamu
在这项研究中，我们研究了牙科贵金属合金和磁性不锈钢，即SUS 4447 SUS XM27和SUS 447J1，用于牙科磁性附着体的腐蚀行为。当它们彼此接触时，从腐蚀电位的角度评价它们的电偶腐蚀行为。贵金属合金的静态电位始终高于磁性不锈钢。由于大多数金合金比银合金更显著地提高了腐蚀电位，因此银合金似乎比金合金更适合与磁性不锈钢组合。然而，所有的腐蚀电位值都充分低于不锈钢的击穿电位，并存在于其钝化区域内。根据本研究的结果，SUS XM 27和SUS 447 J1（比SUS 444表现出更高的击穿电位）成为与金合金结合的首选。
In this study, we examined the corrosion behavior of dental precious alloys and magnetic stainless steels, namely SUS 4447 SUS XM27, and SUS 447J1, used for dental magnetic attachments. Their galvanic corrosion behavior was evaluated from the viewpoint of corrosion potentials when they were in contact with each other. Rest potentials of the precious alloys were constantly higher than those of magnetic stainless steels. Since most gold alloys raised the corrosion potential more significantly than silver alloys did, silver alloys seemed to be better suited than gold alloys for combination with magnetic stainless steels. However, all corrosion potential values were sufficiently lower than the breakdown potentials of the stainless steels and existed within their passive regions. Based on the findings of this study, SUS XM27 and SUS 447J1 - which exhibited higher breakdown potentials than SUS 444 - emerged as the preferred choices for combination with gold alloys.