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http://dx.doi.org/10.9726/kspse.2014.18.6.029

A Study on the Electrochemical Characteristics of Al-Si Casting Alloys in NaCl Solution  

Woo, Sang-Hyun (Department of Material System Engineering, Graduate School, Pukyung University)
Son, Young-Jin (Department of Material System Engineering, Graduate School, Pukyung University)
Lee, Byung-Woo (Department of Material System Engineering, Pukyung University)
Publication Information
Journal of Power System Engineering / v.18, no.6, 2014 , pp. 29-33 More about this Journal
Abstract
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.
Keywords
Electrochemical characteristics; Al-Si casting alloys; Corrosion current density; Corrosion rate; Potentiodynamic polarization curve;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
연도 인용수 순위
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