Galvanic corrosion of ferritic stainless steels used for dental magnetic attachments in contact with an iron-platinum magnet

Keisuke Nakamura, Yukyo Takada, Masanobu Yoda, Kohei Kimura, Osamu Okuno

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

This study was an examination of the galvanic corrosion of ferritic stainless steels, namely SUS 444, SUS XM27, and SUS 447J1, in contact with a Fe-Pt magnet. The surface area ratio of each stainless steel to the Fe-Pt magnet was set at 1/1 or 1/10. Galvanic corrosion between the stainless steels and the magnet was evaluated by the amount of released ions and the electrochemical properties in 0.9% NaCl solution. Although each stainless steel showed sufficient corrosion resistance for clinical use, the amount of ions released from each tended to increase when the stainless steel was in contact with the magnet. When the surface area ratio was reduced to 1/10, the amount of Fe ions released from the stainless steels increased significantly more than when there was no contact. Since contact with the magnet which possessed an extremely noble potential created a very corrosive environment for the stainless steels, 447J1 was thus the recommended choice against a corrosion exposure as such.

Original languageEnglish
Pages (from-to)203-210
Number of pages8
JournalDental materials journal
Volume27
Issue number2
DOIs
Publication statusPublished - 2008

Keywords

  • Ferritic stainless steel
  • Galvanic corrosion
  • Iron-platinum magnet alloy

ASJC Scopus subject areas

  • Ceramics and Composites
  • Dentistry(all)

Fingerprint Dive into the research topics of 'Galvanic corrosion of ferritic stainless steels used for dental magnetic attachments in contact with an iron-platinum magnet'. Together they form a unique fingerprint.

Cite this