摘要
测定和研究了引入稀土金属 Y时化学镀 Co- B合金镀液的阴极极化曲线、沉积速度、Co- B合金镀层的化学成分和晶体结构。结果表明稀土金属 Y的介入明显地改善了化学镀 Co- B合金的静止电位和极化度 ,随镀液里稀土金属 Y添加量的增加 ,合金的沉积速度和镀层中 Y的含量都是先增后降 ,且都在 Y=4.0 g/L时达到最大值。稀土 Y的介入使化学镀 Co- B- Y合金镀层中 B的含量减少 ,Co含量增加 ,并使具有非晶态结构的化学镀 Co- B合金转化为晶态结构的化学镀 Co- B- Y合金。
Cathodic polarization curves and depositing rate of electroless Co-B plating baths, chemical composition and crystal structure of the alloy coatings with rare-earth metal yttrium intervening in the plating bath were studied and analysed. The results showed that the static potential and polarizability are remarkably improved by rare-earth metal yttrium intervening in the plating baths. With addition quantity of yttrium in plating baths increasing, both depositing speed of electroless Co-B alloy and yttrium content of the alloy coatings are increasing first and decreasing afterwards, and both of which reach their peak values at Y=0.4 g/L in the plating bath. With rare-earth metal yttrium intervening in the plating baths, the boron content is decreased and cobalt content increased in electroless Co-B-Y alloy coating. At the same time electroless Co-B alloy with amorphous structure is transformed to electroless Co-B-Y alloy with crystalline structure.
出处
《电镀与精饰》
CAS
2004年第1期1-4,共4页
Plating & Finishing
基金
安徽省自然科学基金资助项目 (0 0 0 4 6 4 0 2 )
