作　　者： ; ; ;

机构地区： 华南理工大学机械与汽车工程学院

出　　处： 《华南理工大学学报（自然科学版）》 2008年第7期87-91,共5页

摘　　要： 通过化学镀获得了混晶(非晶+微晶)和纳米晶态两种结构的Ni-Mo-P合金镀层,并对混晶态镀层进行了不同的晶化处理,得到单相和双相的纳米晶镀层各一种.通过阳极极化曲线分析了各镀层在5%H2SO4溶液中的耐蚀性能,并与Ni-P镀层进行对比,发现镀态Ni-Mo-P纳米晶镀层的耐蚀性能优于镀态Ni-P纳米晶镀层,混晶镀层经退火处理后获得的两种纳米晶镀层的耐蚀性能均优于镀态混晶和纳米晶镀层,同时还发现退火处理获得的Ni-Mo-P双相(Ni+Ni3P)纳米晶镀层与退火处理后获得的Ni-Mo-P单相(Ni)纳米晶镀层的耐蚀性能相当. In this paper, first, two kinds of Ni-Mo-P alloy coatings respectively with nanocrystalline and mixed- crystalline （ a mixture of amorphous and microcrystalline） structures were prepared by an electroless process. Next, single- and double-phase nanocrystalline Ni-Mo-P alloy coatings were obtained via different crystallization processes of the mix-structure counterpart. Then, the corrosion behaviors of the obtained coatings in 5% sulfuric acid solution were investigated according to the anodic polarization curves of the coatings. The results were finally compared with those of Ni-P coatings. It is shown that the as-plated nanocrystalline Ni-Mo-P coatings possess much higher corrosion resistance than the as-plated nanocrystalline Ni-P coatings, that the single- and double-phase nanocrystalline Ni-Mo-P coatings after the annealing are of better corrosion resistance than the as-plated mix-structure and nanocrystalline counterparts, and that, after the annealing, the corrosion resistance of the double-phase nanocrystalline Ni-Mo-P （Ni ＋ Ni3P） coatings is similar to that of the single-phase counterparts.

关 键 词： 化学镀 晶化 纳米晶 腐蚀性能

领　　域： [金属学及工艺] [金属学及工艺]