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    • Corrosion Resistance of Al-Si-Cu Die Casting Aluminum Alloy

    • Zhang Li~1

      1 ,

      Wang Qudong~1

      12 ,

      Hu Maoliang~1

      1 ,

      Ding Wenjiang~1

      12
    • Vol. 31, Issue 11, Pages: 1021-1024(2011)   

      Published: 2011

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  • Zhang Li~1, Wang Qudong~1, Hu Maoliang~1, et al. Corrosion Resistance of Al-Si-Cu Die Casting Aluminum Alloy. [J]. Special Casting & Nonferrous Alloys 31(11):1021-1024(2011) DOI:
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    Abstract

    The corrosion behavior of A380 and A360 alloy prepared by permanent mould casting was investigated,and its corrosion mechanism was approached.Corrosion rate of the alloys was measured by the immersion experiment in 3.5% NaCl solution.Meanwhile,morphology of corrosive product and the matrix were observed by optical microscope and scanning electron microscope with energy dispersive spectroscopy.The corrosion mechanism was analyzed with the help of electrochemical polarization curves.The results reveal that the corrosion rate of the A360 alloy is lower than that of A380 alloy.Pitting erosion can be observed on both the A380 alloy and A360 alloy in 3.5%NaCl solution,and white-loccular corrosion product are distributed on the surface of the samples.However,the pitting erosion occurred in A380 alloy is more serious than that in A360 alloy.Meanwhile,the corrosion morphology and corrosion mechanism are obviously different in A380 alloy and in A360 alloy.

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    Keywords

    Al-Si-Cu Alloy; Permanent Mould Casting; Corrosion Resistance; SEM-EDS; Polarization Curves

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