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Journal of Dental Research
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Materials Science

Copper and Silver Corrosion Activity in Crown and Bridge Alloys

David C. Wright

Research Division, J. M. Ney Co., Bloomfield, Connecticut 06002

R.M. German

Research Division, J. M. Ney Co., Bloomfield, Connecticut 06002

Robert F. Gallant

Research Division, J. M. Ney Co., Bloomfield, Connecticut 06002

Effects of decreased alloy nobility are measured with respect to copper and silver corrosion activity. A potentiodynamic technique is developed for this analysis. It is shown that copper and silver have characteristic potentials for which individual current densities are maximal. Identification of characteristic potentials allows the definitive analysis of 11 commercial crown and bridge alloys for copper and silver corrosion. It is shown that microstructure, as well as alloy chemistry, plays a major role in determining corrosion resistance.

REFERENCES

  • Sarkar, N.K.; Fuys, R.A.; and Stanford, J.W.: The Chloride Corrosion Behavior of Silver-base Casting Alloys, J Dent Res 58: 1572, 1979.[Abstract/Free Full Text]
  • Huget, E.F.; Dvibedi, N.; and Cosner, H.E.: Characterization of "Economy" Crown and Bridge Alloys, IADR Progr & Abst 55: No. 697, 1976.
  • Standard Reference Method for Making Potentiostatic and Potentiodynamic Anodic Polarization Measurements, American Society for Testing and Materials, 1916 Race Street, Philadelphia, PA 19103.
  • Fontana, M.G. and Green, N.D.: Corrosion Engineering, New York: McGraw-Hill, 1967.

Journal of Dental Research, Vol. 60, No. 4, 809-814 (1981)
DOI: 10.1177/00220345810600040701
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P.P. Corso Jr, R.M. German, and H.D. Simmons Jr
Corrosion Evaluation of Gold-based Dental Alloys
Journal of Dental Research, May 1, 1985; 64(5): 854 - 859.
[Abstract] [PDF]

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Right arrow Articles by Gallant, R. F.
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