Effect of phosphite in En bath on plating rate and precipitation of phosphite with ferrous sulfate have been studied in this article.There is almost no effect when phosphite concentration is low.

• 本文研究了化学镀镍溶液中亚磷酸根浓度对沉积速度的影响，以及加 入硫酸铁化学沉淀法降低亚磷酸根浓度，结果表明：当亚磷酸钠的浓 度较低时，对沉积速度影响不大；