TY - JOUR N2 - The β phase (Al 12Mg 17) precipitated by heat treatment in some alloy compositions may result deterioration of corrosion resistance. However, much of its role remains unclear. The effect of the β phase on the corrosion resistance behavior in a NaCl solution was presented in this study. The specimen was Mg-9mass%Al (AM90) alloy and the content of the β phase precipitant was controlled systematically by aging time at 473 K. Area rate of β and lamellar phase in the specimens were 0, 10 and 100%, respectively. According to the results of cathodic polarization curves measurement, the corrosion current density of α phase was 0.215 A/m2 and β phase of it was 0.096 A/m2. While, the specimen includes 10% of β and lamellar phase showed large corrosion current density of 0.251 A/m2. Positive correlation between the β phase and the open circuit potential, suggest that the β phase acts as a cathodic electrode. Moreover, the microstructure after postentiostatic corrosion tests was also support the role of β phase. L1 - http://www.czasopisma.pan.pl/Content/123326/PDF/AMM-2022-2-47-Hatakeyama.pdf L2 - http://www.czasopisma.pan.pl/Content/123326 PY - 2022 IS - No 2 EP - 766 DO - 10.24425/amm.2022.137815 KW - magnesium KW - corrosion KW - light alloy A1 - Hatakeyama, Masahiko A1 - Shimada, Yusuke A1 - Kawate, Naoki A1 - Sarayama, Kaede A1 - Sunada, Satoshi PB - Institute of Metallurgy and Materials Science of Polish Academy of Sciences PB - Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences VL - vol. 67 DA - 2022.06.10 T1 - The role of β (Al 12Mg 17) phase on corrosion behavior of the AM90 alloy in NaCl aqueous solution SP - 759 UR - http://www.czasopisma.pan.pl/dlibra/publication/edition/123326 T2 - Archives of Metallurgy and Materials ER -