化学镀Ni-P-W/Al_2O_3复合镀层的耐腐蚀性能研究

Investigation on the Corrosion Resistance of Chemically Ni-P-W/Al_2O_3 Composite Coatings

用化学镀方法在NdFeB磁性材料基体表面施镀Ni-P-W/Al2O3复合镀层.用扫描电子显微镜和X射线仪分别对Ni-P-W/Al2O3复合镀层的组织形貌和相组成进行了分析,并用腐蚀失重法对复合镀层的耐腐蚀性能进行了测试.结果表明,随着Al2O3质量含量(5～20g/L)的逐渐增大,Ni-P-W/Al2O3复合镀层的抗腐蚀性能逐渐增强.

The Ni-P-W/A12O3 composite coatings were deposited on the NdFeB magnetic materials surface by chemical plating method. The morphology of Ni-P-W/A12O3 composite coatings was investigated using scanning electron microscopy. The X-ray diffraction was used to identify the phase constituents. The corrosion resistance of the composite coatings was also tested using weight loss experiment. The results indicated that with the increasing of A1203 content, the corrosion resistance of the amorphous composite coatings was increased gradually.