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Quintessence Publishing: Journals: QI
Quintessence International

Edited by Eli Eliav

ISSN 0033-6572 (print) • ISSN 1936-7163 (online)

April 1992
Volume 23 , Issue 4

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In vitro corrosion behavior of 13 prosthodontic alloys


Pages: 279-287
PMID: 1502304

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 nobility (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

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