Corrosion behavior of the industrially manufactured and experimentally produced materials of an Al-Mg-Si alloy A6N01 was investigated for a soak in synthetic seawater at 25 deg C for one year. Microstructural analyses of the specimens were carried out by EPMA, TEM and XRD. Although the chemical compositions and mechanical properties were within the limit prescribed in the standard (JIS), a wide variation of the microstructure was observed probably depending on manufacturing process. SEM observations of the surface after cleaning the samples revealed that the corrosion morphologies were categorized into three types including general corrosion, intergranular corrosion and pitting with intergranular corrosion. The as-received materials were characterized by the detailed analyses of the second-phase particles and the precipitates in the aluminum matrix. The corrosion morphologies correlate with microstructural features probably because the local-action cell formation depends on the distribution of additive elements in the aluminum matrix.


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    Title :

    Influence of microstructure on seawater corrosion of Al-Mg-Si alloy A6N01


    Contributors:
    Takahashi, C. (author) / Matsuoka, K. (author) / Senda, T. (author) / Kotani, N. (author) / Yano, F. (author)


    Publication date :

    2000


    Size :

    8 Seiten, 6 Bilder, 6 Quellen


    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English