The surface treatment on oxide film of pure titanium Part 2.Ceramization of anodic oxide film

目的:用有氧加热处理阳极氧化膜以进一步提高纯钛的耐腐蚀性。材料和方法:6片直径9 mm厚2 mm的纯钛片经阳极氧化处理24 v 10 min后置于烤瓷炉,在有氧环境中加热至400℃(A)、420℃(B)、450℃(C)、500℃(D)、700℃(E)、915℃(F),分别维持40 min,用X线衍射和电化学法检测氧化膜的微观结构和耐腐蚀性,再将样本A和E在上述条件下分别在加热40 min,重复以上检测。结果:加热400℃维持40 min的阳极氧化样品的耐腐蚀性最好,过高的加热温度和加热时间都会破坏氧化膜的耐腐蚀性。结论:阳极氧化结合有氧加热处理是一种较好的提高纯钛氧化膜的耐腐蚀性的方法。

Iron Arene Salts as Initiators for Thermal Curing of Epoxides by Photo-catalysis

[Cyclopentadien-Fe-naphthalene]BF4(CFN) and [cyclopentadien-Fe-anisole]BF4(CFA) as thermal cationic initiators for the curing of epoxide E44 and GGE were investigated. CFN brought out the curing of E44 at 89.1℃ and that of GGE at 148.7℃. However, CFA had much less thermal initiating activity under 300℃. Under UV radiation for short time, the thermal initiating activities of CFN and CFA were enhanced obviously. It was observed that the initiating onset temperature decreased and the evolved heat of the curing increased. Both CFN and CFA can carry out the polymerization of E44 and GGE near 85℃ and 112℃ by UV radiation.