面向磁性磨料制备的化学镀反应体系优化

Optimization of Electroless Plating Reaction System for Magnetic Abrasive Preparation

为提高采用化学复合镀制备磁性磨料的制备效率和质量,针对磁性磨料制备的化学反应体系开展优化研究。根据优化的化学反应体系进行磁性磨料化学复合镀制备试验,并对所制备的磁性磨料的性能进行检验。结果表明:丁二酸浓度对化学镀反应体系的镀速有显著影响,柠檬酸的浓度有较为显著的影响,丁二酸和乳酸的浓度对镀液pH值变化量的影响最小;优化的化学镀反应体系为柠檬酸浓度4 g/L、氨基乙酸浓度9 g/L、丁二酸浓度19 g/L、乳酸浓度26 g/L、硫酸镍浓度32 g/L、镀液pH值5.0~5.4;制备的磁性磨料表面镀层金刚石含量较高且分布均匀,在超声辅助磁性磨料光整加工钛合金中的使用寿命在30 min以上。

In order to improve the preparation efficiency and quality of magnetic abrasive prepared by electroless composite plat⁃ing,the chemical reaction system for magnetic abrasive preparation was optimized.According to the optimized chemical reaction sys⁃tem,the preparation experiment of magnetic abrasive by electroless composite plating was carried out,and the properties of the pre⁃pared magnetic abrasive were tested.The results show that the concentration of succinic acid has a significant effect on the plating rate of the electroless plating reaction system,and the effect of citric acid concentration is less than that of succinic acid,the concentration of succinic acid and lactic acid has the least effect on the pH change of plating solution.The optimized electroless plating reaction sys⁃tem is citric acid concentration is 4 g/L,aminoacetic acid concentration is 9 g/L,succinic acid concentration is 19 g/L,lactic acid concentration is 26 g/L,nickel sulfate concentration is 32 g/L and pH of plating solution is within 5.0~5.4.Diamond content on the surface of the prepared magnetic abrasives is high and the diamonds are uniformly distributed.Service life of the prepared magnetic ab⁃rasive in ultrasonic assisted magnetic abrasive finishing of titanium alloys is more than 30 minutes.