Corrosion properties of soldered joints. Part I: Electrochemical action of dental solder and dental nickel-chromium alloy

Naofumi Shigeto, Toshiyuki Yanagihara, Taizo Hamada, Ejvind Budtz-Jørgensen

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

The corrosion properties of contact between six Ni-Cr alloys and two dental solders were evaluated. Ni-Cr alloys with low Cr content coupled with silver solder induced continuous galvanic current, whereas Ni-Cr alloys with high Cr and some Mo content coupled with silver or gold solder induced galvanic current for a short time. Six Ni-Cr alloys were divided into two groups according to the dissolution of Ni, one low-resistance and the other high-resistance. The initial equilibrium was induced between high-resistance Ni-Cr alloys and both solders by less current density, which implies a smaller degree of corrosive current than that in low-resistance alloys. Corrosion was observed in the silver solder coupled with high-resistance Ni-Cr alloy, but was not found in the gold solder coupled with both alloys. In soldering Ni-Cr alloy it is better to use a gold solder and a high-resistance Ni-Cr alloy for corrosion resistance.

Original languageEnglish
Pages (from-to)512-515
Number of pages4
JournalThe Journal of Prosthetic Dentistry
Volume62
Issue number5
DOIs
Publication statusPublished - 1989 Nov

ASJC Scopus subject areas

  • Oral Surgery

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