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KMID : 0613219920100010197
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Bulletin of Ji San Nursing and Health College
1992 Volume.10 No. 1 p.197 ~ p.232
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Study on the Corrosion Properties of Au-Ag-Cu Dental Alloys
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Abstract
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Corrosioncharacteristics of four commercial gold-based dental alloys(C-1 : Au 75%, Ag 13.9%, Pd 3%, Cu & etc., 8.1%, C-2 : Au 52.08, Ag 24%, Pd 5%, Cu & etc., 18.92, C-3 : Au 53%, Ag 22%, Pd 5%, Pt 3%, Cu & etc., 17%, C-4 : Au 53%, Pd 4, Pt 1.5%,
Ag &
Cu & etc., 41.5%) and four experimental ternary Au-Ag-Cu alloys(E-1 : Au 50%, Ag 30%, Cu 20%, E-2 : Au 50%, Ag 20%, Cu 30%, E-3 : Au 50%, Ag 10%, Cu 40%, E-4 : Au 50%, Ag 40%, Cu 10%) were investigated by potentiodynamic polarization analysis and
the
structure was examined by optical microscope and SEM.
All corrosion testing was conducted in 1% NaC1 solution.
@ES The main results are as follows:
@EN 1. The corrosion resistance of commercial alloys was decreased in the order of C-1, C-3, C-4, C-2, C-2.
2. The E-1 and E-3 ternary alloys exhibits the higher corrosion resistance than E-2 and E-4 alloys.
3. The cast microstructure of alloys reveals dendrite morphology which shows the significant microsegregation caused by the difference in the diffusion rate between liquid and solid.
4. It is found that the surface corrosion products were mainly AgC1 by X-ray diffraction results
@EN 1. The corrosion resistance of commercial alloys was decreased in the order of C-1, C-3, C-4, C-2, C-2.
2. The E-1 and E-3 ternary alloys exhibits the higher corrosion resistance than E-2 and E-4 alloys.
3. The cast microstructure of alloys reveals dendrite morphology which shows the significant microsegregation caused by the difference in the diffusion rate between liquid and solid.
4. It is found that the surface corrosion products were minly AgC1 by X-ray diffration results
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