In vitro corrosion behavior of 13 prosthodontic alloys.
The corrosion behavior of 12 high-gold, low-gold, palladium-silver, and nickel-chromium alloys was tested using electrochemical techniques. A 22-carat-gold alloy was used as a control. High-gold alloys were extremely resistant to corrosion, but the resistance of the alloys decreased with decreasing mobility (from high-gold, to palladium-silver, to low-gold, to nickel-chromium alloys). Tests were also made to determine the type of corrosive attack; nickel-chromium alloys exhibited pitting, and palladium-silver alloys demonstrated the selective dissolution of the silver-rich phases. The corrosion resistance of noble alloys was far superior to that of nickel-chromium-based alloys; therefore, the palladium-silver alloys, which have a moderate price range, may be more suitable for restorations.
Canay
S
S
University of Hacettepe, Faculty of Dentistry, Ankara, Turkey.
Oktemer
M
M
D002858:Chromium Alloys / Q000737:chemistry*; D003343:Corrosion; D003722:Dental Alloys / Q000737:chemistry*; D004570:Electrogalvanism, Intraoral; D006047:Gold Alloys / Q000737:chemistry*; D006801:Humans; D009532:Nickel; D010165:Palladium; D012464:Saliva, Artificial; D012834:Silver
D002858:Chromium Alloys; D003722:Dental Alloys; D006047:Gold Alloys; D012464:Saliva, Artificial; D012834:Silver; D010165:Palladium; D009532:Nickel