Marek M, Okabe T
J Biomed Mater Res. 1978 Nov;12(6):857-66. doi: 10.1002/jbm.820120608.
The effects of crevice corrosion on the major structural phases of a high copper dental amalgam were studied in vitro. Three kinds of samples were used: (1) amalgam prepared from a high copper, single composition alloy, (2) annealed ingots of the Ag3Sn and Cu3Sn phases, and (3) high copper, single composition alloy tablets electroplated with mercury. Specimens were examined in a scanning electron microscope before and after the exposure to a corrosion environment. The Ag3Sn and Cu3Sn phases were least affected by corrosion. The Ag-Hg-Sn phase (gamma1) slowly deteriorated, but the attack was nonuniform. The Cu6Sn5 phase exhibited good corrosion resistance, better than that of gamma1 phase. Particles of a tin rich phase of uncertain origin were observed on some of the samples after long exposures.
体外研究了缝隙腐蚀对高铜牙科汞合金主要结构相的影响。使用了三种样品：(1) 由高铜单一成分合金制备的汞合金，(2) Ag3Sn和Cu3Sn相的退火铸锭，以及(3) 电镀汞的高铜单一成分合金片。在暴露于腐蚀环境前后，用扫描电子显微镜对样品进行检查。Ag3Sn和Cu3Sn相受腐蚀影响最小。Ag-Hg-Sn相（γ1）缓慢劣化，但腐蚀不均匀。Cu6Sn5相表现出良好的耐腐蚀性，优于γ1相。长时间暴露后，在一些样品上观察到来源不确定的富锡相颗粒。
