In this study, the recently developed Al 2013 alloy was T8-tempered and, to improve the strength and corrosionresistance, slight amounts of Zr of 0.2 wt% and 0.5 wt%, respectively, were added and the mechanical properties were analyzed. For microstructure and precipitate analysis, OM observation, XRD analysis, and TEM analysis were performed, and for the mechanical property analysis, hardness and tensile strength tests were done. Also, in order to determine the corrosion rate according to the Zr content, a potentiodynamic polarization test was performed and the properties were compared and analyzed. The size of the precipitate varied with the content of Zr and was finest at Zr content of 0.2 wt%; it grew larger at 0.5 wt%, at which point the hardness value accordingly showed the same trend. On the other hand, as calculated from the aspect of chemical bonding among atoms, it was confirmed that the tensile strength and the corrosion-resistance increased with the same trend.

1. 서 론
 2. 실험 방법
 3. 결과 및 고찰
 4. 결 론
 References

• 백민숙(순천대학교 미래전략신소재공학과) | Min-Sook Baek
• 조사현(순천대학교 미래전략신소재공학과) | Sa-Hyeon Cho
• 박만복(차세대 전략산업용 희유자원 실용화센터) | Man-Bok Park
• 윤동주(차세대 전략산업용 희유자원 실용화센터) | Dong-Joo Yoon Corresponding author
• 허기복((주)삼우ECO) | Ki-Bok Heo