Ohno H, Miyakawa O, Watanabe K, Shiokawa N
J Dent Res. 1982 Nov;61(11):1255-61. doi: 10.1177/00220345820610111001.
For gold alloys containing only In as a base metal, an external In2O3 layer forms uniformly on the alloy surface. However, when the alloy contains Sn and In, no external oxide layer can be detected by electron probe micro-analysis, and oxide particles composed of In2O3 and SnO2 precipitate in the alloy. For alloys containing Ni, in addition to In and Sn, the external oxide is composed of NiO; there is little development of internal oxide. For alloys containing Fe and Sn, an oxide layer of only Fe2O3 forms on the alloy surface, and the internal oxidation zone shows a band-like structure containing SnO2 and a small amount of Fe2O3.
对于仅含铟作为贱金属的金合金，合金表面会均匀形成一层外部氧化铟层。然而，当合金中含有锡和铟时，通过电子探针微分析无法检测到外部氧化层，且由氧化铟和二氧化锡组成的氧化物颗粒会在合金中析出。对于含有镍的合金，除了铟和锡之外，外部氧化物由氧化镍组成；内部氧化物的形成较少。对于含有铁和锡的合金，合金表面仅形成一层三氧化二铁氧化层，内部氧化区呈现出包含二氧化锡和少量三氧化二铁的带状结构。
