The Journal of the Japanese Society for Dental Materials and Devices
Online ISSN : 2188-4188
Print ISSN : 0286-5858
ISSN-L : 0286-5858
Original Article
Reversing Potentials and Increasing Amount of Released Ions with Contact Corrosion between Stainless Steels and Au-Ag-Pd Alloys
Yukyo TAKADAOsamu OKUNO
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JOURNAL FREE ACCESS

1996 Volume 15 Issue 6 Pages 525-531

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Abstract
When Au-Ag-Pd alloys contacted electrically with stainless steel, such as type 447J1 and 316L, were immersed in 0.9% NaCl solution at 37℃ for seven days, amounts of ions released from Au-Ag-Pd alloys and stainless steel increased compared with that after a single immersion.The resting potential of each was changed with the immersion time.Au-Ag-Pd Alloys showed more noble potentials initially.However, the potentials of stainless steel increased gradually and were higher than those of the Au-Ag-Pd alloys after a few hours.Mixed potentials initially stayed around the corrosion area of stainless steel with higher current density compared to that with single potential.After potentials were reversed, the mixed potential moved into the corrosion area of Au-Ag-Pd alloys with higher current density.Therefore, the stainless steel initially and Au-Ag-Pd alloys after a few hours were so easy to corrode that both the nobel and base alloys showed accelerated corrosion under these Conditions.
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© 1996 The Japanese Society for Dental Materials and Devices
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