• corrosion properties and corrosion evolution of as-cast az91 alloy with rare earth yttrium

    نویسندگان :
    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1390/01/01
    • تاریخ انتشار در تی پی بین: 1390/01/01
    • تعداد بازدید: 377
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     the corrosion resistance property and the corrosion evolution of as-cast az91 alloy with rare earth y addition are investigated by using immersion tests, electrochemical impedance spectroscopy (eis), and x-ray photoelectron spectroscopy (xps). the results show that the proper amount of y in the alloys can improve the corrosion resistance of az91 alloys effectively. with the increment of y, the corrosion rate of the modified az91 alloys by y addition was markedly less than that of az91 alloy. the corrosion rate of az91 alloy with 0.3 wt.% y was the slightest, but further addition of y content over 0.3 wt.% make the corrosion heavier. the xps analysis suggests that the compound film of az91 alloy with 0.3 wt.% y is mainly composed of mg(oh)2 and mgco3without any al(oh)3 and al2o3, in addition, y2o3 phase is found in the compound film of az91 alloy with 0.3 wt.% y, which benefits to stabilize the surface film.

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