中国有色金属学报（英文版）
中國有色金屬學報（英文版）
중국유색금속학보（영문판）
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
2014年
12期
3825-3833
,共9页
孙灿%郭兴伍%王少华%郭嘉成%丁文江
孫燦%郭興伍%王少華%郭嘉成%丁文江
손찬%곽흥오%왕소화%곽가성%정문강
AZ91D镁合金%均一化前处理%化学镀Ni-P%腐蚀
AZ91D鎂閤金%均一化前處理%化學鍍Ni-P%腐蝕
AZ91D미합금%균일화전처리%화학도Ni-P%부식
AZ91D magnesium alloy%homogenization pretreatment%electroless nickel plating%corrosion
采用新型环保的均一化前处理工艺在AZ91D镁合金表面制备了化学镀Ni?P镀层。研究了前处理过程中AZ91D基体微观形貌、镀层沉积过程、成分和相结构。研究结果表明：基体表面的β相在前处理过程中被选择性去除，表面组织得到均一化，从而获得均匀致密的浸Zn层。Ni?P颗粒均匀形核生长，并最终形成致密的镀层。镀层具有优良的耐腐蚀性能。
採用新型環保的均一化前處理工藝在AZ91D鎂閤金錶麵製備瞭化學鍍Ni?P鍍層。研究瞭前處理過程中AZ91D基體微觀形貌、鍍層沉積過程、成分和相結構。研究結果錶明：基體錶麵的β相在前處理過程中被選擇性去除，錶麵組織得到均一化，從而穫得均勻緻密的浸Zn層。Ni?P顆粒均勻形覈生長，併最終形成緻密的鍍層。鍍層具有優良的耐腐蝕性能。
채용신형배보적균일화전처리공예재AZ91D미합금표면제비료화학도Ni?P도층。연구료전처리과정중AZ91D기체미관형모、도층침적과정、성분화상결구。연구결과표명：기체표면적β상재전처리과정중피선택성거제，표면조직득도균일화，종이획득균균치밀적침Zn층。Ni?P과립균균형핵생장，병최종형성치밀적도층。도층구유우량적내부식성능。
Electroless nickel plating on AZ91D substrate with a new and eco-friendly pretreatment process based on tuning an electrochemical homogeneous surface was investigated. The morphology, deposition process, chemical composition and microstructure of Ni?P coating were studied. It is indicated that β phases are selectively removed, producing a microstructural homogeneous surface and the subsequent uniform and compact Zn immersion layer. A defect-free and well adhesive Ni?P coating can be successfully obtained due to its uniform nucleation and growth based on such pretreatment. Potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) tests reveal that Ni?P coating could significantly improve the corrosion resistance of AZ91D substrate.
