AZ91镁合金表面制备Ni-SiO2纳米复合电镀层的工艺研究.pdf

AZ91镁合金表面制备Ni—Si02纳米复合电镀层的工艺研究 张昕。张秀芝。朱华军，孔换明，刘培培 (太原科技大学，太原030024) A／ 的影响，从而得出最佳工艺。研究结果表明：在镀液中纳米SiO：的添加量为20g／I。，阴极电流密度为1．0 dmz，镀液温度为50℃，活性荆A的添加量为】．0 rain电沉积，可获得均 g／I。，pH为5～6的条件下，经过20～30 匀、平滑的镀层，镀层的显微硬度与耐蚀性最佳。 [关键词]镁合金；纳米复合电镀；显微硬度；耐蚀性 [中图分类号]TQl53．1 [文献标识码]A the forAZ91 on Processof Ni—Si02 Study Plating Coating MagnesiumAlloys ZHANGXin，ZHANGXiu-zhi，ZHU Hua-jun，KONGHuan—ming，LJ【，Pei-pei ofScienceand 030024，China) University (Taiyuan Technology，Taiyuan nano-sized was onAZ91 Ni—Si02 magnesiumalloysbycompositeelectroplating， [Abstract]The coatingprepared and show andtheeffectof onthe wasstudiedthe wasobtained．Theresults coating optimumprocess processparameter when thatthesurfaceofthe issmoothandthe thebestmicro-hardnessandcorrosionresistance coating coatingposesses and bath thecontentofnano-sized activatoris20 and1 inthe with value Si02 g／L g／L electroplatingpH 5～6，respec— the timeis20～30minat50℃andthethecathodiccurrent is1 A／dm2． tively，andelectrodepositing density magnesium composite resistance [Keywords] alloy；nano-sized 镁合金具有比重轻、比强度及比刚