摘要
AZ31D镁合金上直接化学镀镍的较佳工艺条件为:硫酸镍14~22gm,次磷酸钠20~28gm,柠檬酸5~7gm,乙酸钠9~17g/L,氟化氢铵8g/L,40%(体积分数)的氢氟酸12mL/L,硫脲2mg/L,pH(用氨水调节)6.2~6.4,温度75~85。C,时间10~60min。在此条件下获得的化学镀镍层外观良好,磷含量为6%~10%(质量分数),与镁合金基体结合牢固,耐蚀性能好且沉积速率较快。
The optimal process conditions for direct electroless nickel plating on AZ31D magnesium alloy are as follows: nickel sulfate 14-22 g/L, sodium hypophosphite 20-28 g/L, citric acid 5-7 g/L, sodium acetate 9-17 g/L, ammonium hydrogen fluoride 8 g/L, hydrofluoric acid (volume fraction 40%) 12 mL/L, thiourea 2 rag/L, pH 6.2-6.4 (adjusted with ammonia water), temperature 75-85 ~C and deposition time 10-60 min. Under the given conditions, the deposit has the features of good appearance, strong adhesion to magnesium alloy substrate, high corrosion resistance, phosphorus content of 6%- 10% and fast deposition rate.
出处
《电镀与涂饰》
CAS
CSCD
北大核心
2011年第2期15-18,共4页
Electroplating & Finishing
基金
哈尔滨工业大学(威海)研究基金(HIT(wh)XB200802)
中央高校基本科研业务费专项资金(HIT.NSRIF.2009155)
关键词
镁合金
直接化学镀镍
耐蚀性能
magnesium alloy
direct electroless nickel plating
corrosion resistance