CAJ | 학술논문

采用扫描电镜(SEM)和电子衍射能谱(EDX)研究在含K2ZrF6的溶液中AM50镁合金表而复合微弧体氧化涂层的形成过程.采用电化学阻抗谱(EIS)研究在微弧体氧化制备膜层过程中膜层耐腐蚀性能的变化.结果表明:当电压小于起弧电压时,合金表面膜层的主要成分为MgO和MgF3;当施加电压超过起弧电压时,锆氧化物开始在合金表面沉积,且膜层的耐腐蚀性随着电压的升高而提高.
채용소묘전경(SEM)화전자연사능보(EDX)연구재함K2ZrF6적용액중AM50미합금표이복합미호체양화도층적형성과정.채용전화학조항보(EIS)연구재미호체양화제비막층과정중막층내부식성능적변화.결과표명:당전압소우기호전압시,합금표면막층적주요성분위MgO화MgF3;당시가전압초과기호전압시,고양화물개시재합금표면침적,차막층적내부식성수착전압적승고이제고.
The formation processes of a composite ceramic coating on AM50 magnesium alloy prepared by plasma electrolytic oxidation (PEO) in a K2ZrF6 electrolyte solution were studied by scanning electron microscope (SEM) and energy dispersive X-ray spectroscope (EDX). Electrochemical impedance spectroscopy (EIS) tests were used to study the variation of the corrosion resistance of the coating during the PEO treatment. The results show that the coating formed on Mg alloy is mainly composed of MgO and MgF2 when the applied voltage is lower than the sparking voltage, and zirconium oxides start to be deposited on Mg substrate after the potential exceeding the sparking voltage. The corrosion resistance of the coating increases with increasing the applied voltage.