Сравнительное исследование коррозии стоматологического (900°) и ювелирного (585°) золота в среде полости рта

• Date: 2007
• Main Authors: Лавренко, В.А., Лось, В.В., Малышевская, А.И., Швец, В.А., Талаш, В.Н., Кузнецова, Л.И.
• Format: Article
• Language: Russian
• Published: Видавничий дім "Академперіодика" НАН України 2007
• Subjects: Матеріалознавство
• Online Access: https://nasplib.isofts.kiev.ua/handle/123456789/1716
• Journal Title: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Cite this: Сравнительное исследование коррозии стоматологического (900°) и ювелирного (585°) золота в среде полости рта/ В.А. Лавренко, В.В. Лось, А.И. Малышевская, В.А. Швец, В.Н. Талаш, Л.И. Кузнецова // Доп. НАН України. — 2007. — N 3. — С. 105-111. — рос.

The corrosion behavior of tooth and jewellery gold alloys in the medium of a mouth cavity under the extreme situations of a possible contact with other metal or an inhomogeneous crown region has been simulated using the polarization from the outer current source. The methods of potential-dynamic polarization curves, layer-by-layer Auger electron spectroscopy analysis, as well as XRD and petrographic analyses of reaction products, have been used. It has been established that the tooth gold (900°) being the Au3Cu intermetallide is not practically subjected to corrosion at all, whereas the jewellery gold (585°) being the mixture of AuCu3 and AuCu intermetallides with 6% Ag forms ~ 2μm corrosion film consisting of AgCl deposit with small Cu2O and CuO additives on its surface. The reason of such behavior of gold alloys consists in different crystal-chemical features of the structure of appropriate intermetallides, as well as in the different types of oxygen adsorption on their surface.