作　　者： ; ; ; ; ; ;

机构地区： 燕山大学材料科学与工程学院

出　　处： 《中国有色金属学报》 2013年第6期1656-1660,共5页

摘　　要： 利用化学镀对铸态Zr-Al二元合金进行表面处理,在经过除油、酸洗、化学转化处理等预处理工序后,在化学镀液中施镀在合金表面生成Ni-P镀层。利用扫描电镜和X射线衍射仪对合金、化学转化膜以及化学镀层的组成及微观结构进行表征。结果表明:铸态Zr-Al合金由α相(α-Zr)和β相(Zr2Al)组成,其中基体为α相,β相沿晶界呈非连续分布;经锌系化学转化处理后合金表面形成以Zn3(PO4)2.H2O为主要成分的化学转化膜,该膜由细小的片状晶体颗粒密排堆积而成;在此基础上进行化学镀镍磷处理,在铸态Zr-Al合金表面得到Ni-P镀层,其表面颗粒均匀,无明显孔隙缺陷,结合紧密,镀层与基体结合良好。 The electroless nickel-plating on as-cast Zr-Al alloy was studied.After degreasing,pickling,chemical conversion treatment,Ni-P coating on Zr-Al alloy was plated from the electroless plating solution.The microstructure and the phase composition of Zr-Al alloy,phosphate coating and Ni-P coating were observed using scanning electron microscopy（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.The Zn3（PO4）2.H2O conversion film after treated by the chemical conversion solution is formed.The film consists of small crystal particles densely.The Ni-P coating is successfully deposited on the conversion film.The electroless Ni-P coating is uniform,compact and has no obvious defects.The adhesion of the electroless Ni-P coating and substrate satisfies the requirement of ISO 2819.

关 键 词： 铸态 合金 化学转化处理 化学镀 镀层

领　　域： [金属学及工艺] [一般工业技术] [金属学及工艺]