Corrosion and metallurgical study of some porcelain fused to metal alloys.
In order to evaluate the corrosion behaviour of some dental alloys to be applied as base-metal for PFM, electrochemical technique and metallurgical investigation were used. Potentiodynamic and potentiostatic tests were carried out under deaerated and aerated conditions in 1% NaCl solution. The results have shown that Ni-Cr alloy has a superior corrosion resistance under deaerated conditions, whereas Co-Cr alloy has a stronger tendency to passivation under aerated conditions. Fe-Cr alloy has demonstrated a poor performance. The results were analyzed on compositional and microstructural bases.
Metwally
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Corrosion Dept., Central Metallurgical Research and Development Institute, Helwan, Cairo, Egypt.
Habib
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Katamish
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D002626:Chemistry, Pharmaceutical; D003343:Corrosion; D003722:Dental Alloys / Q000737:chemistry*; D003776:Dental Porcelain / Q000737:chemistry*; D012994:Dental Soldering; D008422:Materials Testing / Q000379:methods; D008855:Microscopy, Electron, Scanning; D011199:Potentiometry; D013499:Surface Properties
D003722:Dental Alloys; D003776:Dental Porcelain