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
3810-3817
,共8页
王少华%郭兴伍%孙灿%龚佳%彭立明%丁文江
王少華%郭興伍%孫燦%龔佳%彭立明%丁文江
왕소화%곽흥오%손찬%공가%팽립명%정문강
NZ30K镁合金%前处理%电沉积Cu%腐蚀性能%结合力
NZ30K鎂閤金%前處理%電沉積Cu%腐蝕性能%結閤力
NZ30K미합금%전처리%전침적Cu%부식성능%결합력
NZ30K magnesium alloy%pretreatment%Cu electrodeposition%corrosion resistance%adhesion
研究Mg?3.0Nd?0.2Zn?0.4Zr(NZ30K)镁合金上电沉积Cu镀层的前处理过程及耐腐蚀行为。研究结果表明：活化膜和浸锌层均优先在Mg12Nd共晶相表面沉积。Cu镀层能够为镁基体提供长达60 h的防护作用，这主要归因于其致密的镀层结构及浸泡过程中形成较稳定的钝化膜。热震试验证明镀层具有良好的结合力。
研究Mg?3.0Nd?0.2Zn?0.4Zr(NZ30K)鎂閤金上電沉積Cu鍍層的前處理過程及耐腐蝕行為。研究結果錶明：活化膜和浸鋅層均優先在Mg12Nd共晶相錶麵沉積。Cu鍍層能夠為鎂基體提供長達60 h的防護作用，這主要歸因于其緻密的鍍層結構及浸泡過程中形成較穩定的鈍化膜。熱震試驗證明鍍層具有良好的結閤力。
연구Mg?3.0Nd?0.2Zn?0.4Zr(NZ30K)미합금상전침적Cu도층적전처리과정급내부식행위。연구결과표명：활화막화침자층균우선재Mg12Nd공정상표면침적。Cu도층능구위미기체제공장체60 h적방호작용，저주요귀인우기치밀적도층결구급침포과정중형성교은정적둔화막。열진시험증명도층구유량호적결합력。
To improve the corrosion resistance, electrodeposition of Cu coating on Mg?3.0Nd?0.2Zn?0.4Zr (mass fraction, %NZ30K) magnesium alloy via an appropriate pretreatment was investigated. The surface morphologies, compositions and microstructures of the pretreated films and Cu coating were characterized in detail. The results show that the activation film consists of fluoride and phosphates and Zn immersion film forms preferentially on the eutectic compound Mg12Nd phase region. A smooth, uniform and dense Cu coating is successfully obtained. Potentiodynamic polarization tests reveal that Cu coating can greatly improve the corrosion resistance of NZ30K magnesium alloy. Open circuit potential (OCP) and electrochemical impedance spectroscopy (EIS) tests during long-term immersion further demonstrate that Cu coating can provide an effective protection for NZ30K magnesium alloy from corrosion up to ~60 h, due to its dense structure and a stable passive film formed. In addition, Cu coating exhibits good adhesion to substrate as confirmed by thermal shock test.
