Galvanic corrosion between dental precious alloys and magnetic stainless steels used for dental magnetic attachments

Noriko Takahashi, Yukyo Takada, Osamu Okuno

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

In this study, we examined the corrosion behavior of dental precious alloys and magnetic stainless steels, namely SUS 444, 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.

Original languageEnglish
Pages (from-to)237-242
Number of pages6
JournalDental materials journal
Volume27
Issue number2
DOIs
Publication statusPublished - 2008

Keywords

  • Dental precious alloy
  • Galvanic corrosion
  • Magnetic stainless steel

ASJC Scopus subject areas

  • Ceramics and Composites
  • Dentistry(all)

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