压铸镁合金AZ91D手机内构件的Ni-P化学镀

Electroless Plating of Ni-P on Mobile Telephone's Inner Component Made of Die-Cast AZ91D

采用直接化学镀镍的方法,得到了光亮且均匀、致密的Ni-P镀层。在分析镀层形貌、化学成分和组织结构的基础上,测定了镀层厚度、硬度、结合力、阻抗及耐蚀性。结果表明：改进后的化学镀镍层与基体结合良好；硬度达479×9.8 MPa,400℃热处理后可提高至826X9.8 MPa；阻抗为0.4 Ω,且随热处理温度的提高呈下降趋势；镀层耐腐蚀性能良好,热处理后耐蚀性有所下降。

Electroless plating Ni-P on inner-component of mobile telephone was investigated, A bright, homogeneous and fine Ni-P coatings was obtained. Based on the analysis of coatings morphology, composition and structure, measured the thickness, hardness, adhesion force, impedance and corrosion resistance of the coatings. The conclusions are drawn as follows, the coatings which is improved has good adhesion force. And the hardness can reach 479 × 9.8 MPa, after heat-treatment at 400℃, its hardness can increase to 826 × 9.8 MPa; the impedance is 0.4Ω, its numerical value will drop following the ascent of heat-treatment temperatures; and corrosion resistance of coatings is good, after heat-treatment, its corrosion resistance will drop a little.