Mg-9Al-1Zn合金的表面化学镀与性能研究
发布时间:2017-12-27 11:23
本文关键词:Mg-9Al-1Zn合金的表面化学镀与性能研究 出处:《铸造技术》2016年11期 论文类型:期刊论文
更多相关文章: Mg-Al-Zn合金 化学镀 形貌 性能
【摘要】:对Mg-9Al-1Zn镁合金进行了碱洗除油、无铬处理和化学镀Ni-W-P处理,研究了不同表面镀层的显微形貌、孔隙率、物相组成和耐腐蚀性能等。结果表明,当镀液中Na2CO3浓度为20 g/L时,Mg-Al-Zn合金表面镀层较为平整,镀层团簇晶粒分布均匀,各个团簇倾向于垂直表面方向生长;沉积时间为1 h的Ni-W-P镀层与基体结合良好、镀层较为致密,Ni、W和P元素在界面结合处有明显扩散和浓度梯度;Mg-9Al-1Zn合金基体、Ni-P和Ni-W-P镀层的耐腐蚀性能从大至小依次为:Ni-W-P镀层Ni-P镀层Mg-9Al-1Zn合金基体。
[Abstract]:The Mg-9Al-1Zn magnesium alloy was washed by alkali washing, chrome free and electroless Ni-W-P plating. The microstructure, porosity, phase composition and corrosion resistance of different surface coatings were studied. The results showed that when Na2CO3 solution concentration was 20 g/L, the surface coating of Mg-Al-Zn alloy coating was smooth, uniform distribution of grain clusters, each cluster tends to be perpendicular to the surface direction of growth; the deposition time for combining the Ni-W-P coating and the substrate is 1 h, the good coating is more dense, Ni, W and P elements in the interface there is obvious diffusion and concentration gradient; Mg-9Al-1Zn alloy, Ni-P and Ni-W-P corrosion resistance from large to small is as follows: Ni-W-P coating Ni-P coating of Mg-9Al-1Zn alloy.
【作者单位】: 唐山工业职业技术学院建筑化工系;河北工业大学材料科学与工程学院;
【分类号】:TG174.4
【正文快照】: 镁合金的种类主要包括AZ系、AM系、AS系和AE系列等,按照成形工艺又分为变形镁合金和铸造镁合金,其中Mg-Al-Zn系镁合金由于具有高的强度和优良的铸造性能,成为目前应用较为广泛的镁合金代表[1]。然而,由于这种镁合金自身的耐腐蚀性能较差的缺点,在一定程度上制约了其更广泛的应,
本文编号:1341508
本文链接:https://www.wllwen.com/kejilunwen/jiagonggongyi/1341508.html