作　　者： ; ; ; ; ; ;

机构地区： 燕山大学

出　　处： 《稀有金属材料与工程》 2014年第4期982-985,共4页

摘　　要： 利用化学转化法对铸态Zr-Al合金进行表面处理。在经过除油、酸洗、化学转化等一系列处理工序后,在Zr-Al合金表面生成锌系化学转化膜。利用扫描电镜和X射线衍射仪对合金基体及化学转化膜的化学组成及微观结构进行了研究。结果表明:Zr-Al合金由α相(α-Zr)和β相(Zr2Al)组成,其中基体为α相,β相沿晶界非连续分布;经锌系化学转化处理,合金表面形成以Zn3(PO4)2·H2O和ZnZr(PO4)2·2H2O为主要成分的锌系化学转化膜,该膜结晶团簇较细小,化学转化膜表面颗粒分布均匀,由细小的片状晶体颗粒密排堆积而成,无明显孔隙缺陷,膜层与基体结合良好。探讨了Zr-Al合金上锌系化学转化膜的形成机理。 Chemical conversion treatment on as-cast Zr-Al alloy was studied. After degreasing, pickling and chemical conversion treatment, a zinc chemical conversion film was fabricated on the surface of Zr-Al alloy. The microstructure and the phase composition of Zr-Al alloy and the chemical conversion film were observed using SEM and XRD, respectively. The results show that as-cast Zr-Al alloy is composed of α-Zr and Zr2Al, where α-Zr is substrate and Zr2Al spreads along grain boundaries discontinuously. A Zn3（PO4）2·H2O and ZnZr（PO4）2·2H2O chemical conversion film is formed by treatment in the chemical conversion solution successfully. The film consists of small crystal particles densely. It is uniform, compact and has no obvious defects. The forming mechanism of zinc chemical conversion film on Zr-Al alloy was discussed,

关 键 词： 合金 化学转化处理 形成机理 附着力

领　　域： [金属学及工艺] [金属学及工艺]