稳定剂KI对化学镀Ni-Fe-P-B合金性能的影响

Influences of stabilizer(KI) on properties of electroless plating Ni-Fe-P-B deposit alloys

利用化学镀方法沉积铁合金系镀层，具有诱人的软磁性能，应用于计算机以及磁头材料等领域。近期研究较多的镀层主要有：Fe—P、Fe—Ni-P、Fe-Mo-B、Fe-W—B、Fe—Sn—B、Fe—Mo—W—B和Fe—Ni-P-B等体系，并取得了可喜的成果。但也存在不少问题，化学镀液本身处于热力学不稳定状态，常要加入稳定剂，阻止H2PO2^-分解。目前常用稳定剂：（1）重金属离子，如Pb^2＋等；（2）无机含氧酸根离子，如IO3^-等；（3）有机酸，如柠檬酸等；

Influences of stabilizer （KI） on the corrosion performance of the Ni-Fe-P-B deposit alloys, were investigated using electrochemical methods,weightless corrosion and heat treatment. The results show that corrosion current density （0. 1585mA· cm^2） ,porosity（0.5 No. cm^2） and weightless corrosion rate of the deposit （Ni-Fe-P-B） in corrosion media are lowest,when the stabilizer （KI） concentration is 8mg· L^-1. Corrosion resistance of the deposit drops to a different degree in the range of 200℃ - 600℃ ,and slowly falls down when CKI = 8mg. L^-1. The lattice changes and diffusion layer forming of the deposit play important roles in the changes of corrosion performance in the different range of heat treatment. However, the hardness and abradability of testing alloy increase to a different degree in 200 -400℃. When CKI = 8mg. L^-1 ,hardness of alloy is as high as 950HV after heat treatment at 400℃ × 1h,which is twice that of the as-plated coating.