The Journal of Korean Academy of Prosthodontics (대한치과보철학회지)
- Volume 31 Issue 3
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- Pages.423-446
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- 1993
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- 0301-2875(pISSN)
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- 2005-3789(eISSN)
AN ELECTROCHEMICAL STUDY ON THE CORROSION RESISTANCE OF THE VARIOUS IMPLANT METALS
수종 임플랜트 금속의 내식성에 관한 전기화학적 연구
- Jeon Jin-Young (Department of Pedodontics, College of Dentistry, Seoul National University) ;
- Kim Yung-Soo (Department of Pedodontics, College of Dentistry, Seoul National University)
- Published : 1993.08.01
Abstract
Titanium and its alloys are finding increasing use in medical devices and dental implants. The strong selling point of titanium is its resistance to the highly corrosive body fluids in which an implant must survive. This corrosion resistance is due to a tenacious passive oxide or film which exists on the metal's surface and renders it passive. Potentiodynamic polarization measurement is one of the most commonly used electro-chemical methods that have been applied to measure corrosion rates. And the potentiodynamic polarization test supplies detailed information such as open circuit, rupture, and passivation potential. Furthermore, it indicates the passive range and sensitivity to pitting corrosion. This study was designed to compare the corrosion resistance of the commonly used dental implant materials such as CP Ti, Ti-6A1-4V, Co-Cr-Mo alloy, and 316L stainless steel. And the effects of galvanic couples between titanium and the dental alloys were assessed for their useful-ness-as. materials for superstructure. The working electrode is the specimen , the reference electrode is a saturated calomel electrode (SCE), and the counter electrode is made of carbon. In
Keywords
- corrosion resistance;
- potentiodynamic polarization test;
- breakdown potential;
- passive range;
- galvanic corrosion test