• Title/Summary/Keyword: Al-Si-Cu

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NaCl 수용액에서 Al-Si계 주조용 합금의 전기화학적 특성 연구 (A Study on the Electrochemical Characteristics of Al-Si Casting Alloys in NaCl Solution)

  • 우상현;손영진;이병우
    • 동력기계공학회지
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    • 제18권6호
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    • pp.29-33
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    • 2014

  • The electrochemical characteristics of Al-Si casting alloys (Al-10%Si, Al-9%Si, Al-7%Si) in 3.5% NaCl solution at room temperature was studied using potentiodynamic techniques. The electrochemical values of corrosion potential($E_c$), corrosion current density($I_c$) and corrosion rate(mpy) were examined. The Al-Si alloys had several compounds such as $Mg_2Si$, ${\pi}$-$Al_8Si_6Mg_2Fe$ and $Al_2CuMg$ which could affect corrosion resistance significantly. The potentiodynamic polarization curve exhibited typical active behavior in anodic polarization curve. The major corrosion mechansim for the Al-Si alloys were pitting and grain boundary corrosion. As increasing Si and Cu contents, their corrosion resistance was decreased.

  • https://doi.org/10.9726/kspse.2014.18.6.029 인용 PDF KSCI