Comparative study on corrosion behaviors of Mg-Al-Zn alloys
Transactions of Nonferrous Metals Society of China (English Edition), cilt.28, sa.4, ss.642-650, 2018 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 28 Sayı: 4
- Basım Tarihi: 2018
- Doi Numarası: 10.1016/s1003-6326(18)64696-5
- Dergi Adı: Transactions of Nonferrous Metals Society of China (English Edition)
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Sayfa Sayıları: ss.642-650
- Anahtar Kelimeler: AZ series alloys, casting, corrosion, Mg alloy
- Bilecik Şeyh Edebali Üniversitesi Adresli: Evet
Özet
© 2018 The Nonferrous Metals Society of ChinaA comparative study on corrosion behaviors of various Mg-Al-Zn alloys (AZ21, AZ41, AZ61 and AZ91 series, cast under same cooling conditions and controlled alloying composition) was carried out. Scanning electron microscopy (SEM) and X-ray diffraction (XRD) were used for microstructural examinations. The corrosion behaviors were evaluated by immersion tests and potentiodynamic polarization measurements in 3.5% NaCl solution. The results showed that the influence of Al addition on corrosion resistance was more pronounced up to 4% (i.e. AZ41) above which its influence was at less extent. The deterioration of the corrosion resistance of the alloys, at higher Al contents, was attributed to the amount and morphology of β-Mg17Al12 intermetallics and the interruption of continuity of the oxide film on the surface of the alloys owing to coarsened β intermetallics.