Effect of Annealing Heat Treatment to Characteristics of AlDC8 (Al-Si-Cu) Alloy
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ALDC8 (Al-Si-Cu) alloy has been often corroded with pattern of intergranular corrosion in corrosive environments. Thus, in order to improve its corrosion resistance, the effect of annealing heat treatment to corrosion resistance and hardness was investigated with parameters of heating temperatures such as 100 ℃, 200 ℃, 300 ℃, 400 ℃ and 500 ℃ for 1hr. The hardness was varied with annealing temperature and slightly decreased with annealing heat treatment. However, the relation between annealing temperature and hardness agreed not well each other. Corrosion potential was shifted to noble direction and corrosion current density was also decreased with increasing annealing temperature. Moreover, both AC impedance at 10 mHz and polarization resistance on the cyclic voltammogram curve were also increased with increasing annealing temperature. Furthermore, intergranular corrosion was somewhat observed in non heat treatment as well as annealing temperatures at 100 ℃, 200 ℃ and 300 ℃, while, intergranular corrosion was not nearly observed at annealing temperature of 400 ℃, 500 ℃. Consequently, it is considered that the annealing heat treatment of ALDC8 alloy may be an available method not only to inhibit its intergranular corrosion but also to improve its corrosion resistance.
Abstract
ALDC8 (Al-Si-Cu) alloy has been often corroded with pattern of intergranular corrosion in corrosive environments. Thus, in order to improve its corrosion resistance, the effect of annealing heat treatment to corrosion resistance and hardness was investigated with parameters of heating temperatures such as 100 ℃, 200 ℃, 300 ℃, 400 ℃ and 500 ℃ for 1hr. The hardness was varied with annealing temperature and slightly decreased with annealing heat treatment. However, the relation between annealing temperature and hardness agreed not well each other. Corrosion potential was shifted to noble direction and corrosion current density was also decreased with increasing annealing temperature. Moreover, both AC impedance at 10 mHz and polarization resistance on the cyclic voltammogram curve were also increased with increasing annealing temperature. Furthermore, intergranular corrosion was somewhat observed in non heat treatment as well as annealing temperatures at 100 ℃, 200 ℃ and 300 ℃, while, intergranular corrosion was not nearly observed at annealing temperature of 400 ℃, 500 ℃. Consequently, it is considered that the annealing heat treatment of ALDC8 alloy may be an available method not only to inhibit its intergranular corrosion but also to improve its corrosion resistance.
참고문헌 (16)
- H. Y. Lee, "Metal Corrosion Engineering", pp.262~ (1999), Yun kyung Munhwa Publication Co. Ltd
- S. K. Suriyama, "Non-metal material Engineering", pp.142~ (1975), Korona. Publication Co. Ltd
- Mars. G. Fontana, "Corrosion Engineering", pp.516~ (1986), McGraw- Hill Book company
- Deny A. Jones, "Principles and Prevention of Corrosion", pp.618~ (1996), Pearson Education
- J. W. Martin, "Precipation Hardening", pp.353~ (1968), Pergamon Press Oxford
- Y. Murakami, "Fundamentals and Industrial Technologies of Aluminum Materials", pp.252~ (1985), Light Metals Association
- Y. Murakami, , proceedings of the Advanced Materials and Technology 2nd International Conference, pp.113~ (1991)
- A. Hellawell, "supplementary Volume 2 of the Encyclopedia of Material Science and Engineering", pp.115~ (1990), Oxford Pergamon
- W. L Phillips, "Annotated Equilibrium Diagram of Some Aluminum Alloy Systems", pp.35~57 (1959), Metals
- A. Sakamoto, , proceedings of the Advanced Materials and Technology 2nd International Conference, pp.165~ (1991)
- E. A. Starke, "proceedings of the Materials Science", pp.208~ (1979), ASM, Metals Park
- "J. Gilbert", ASM, 61~, pp.OH 44073-002 (1965)
- S. K. Suriyama, "Non metal material Engineering", pp.152~ (1975), Korona Publication Co. Ltd
- N. J. Beak, "Metal Material Engineering", pp.260~ (1983), Kawang Rim Publication Co. Ltd
- 문경만, "몰타르 시험편(W", C:0.4) 내부철근의 분극특성에 미치는 재령년수의 영향, 2014, pp.13(1), 20~27[DOI]
- D. H. Jeon, "Corrosion and Corrosion control", pp.220~ (1985), Il Jung Publication Co. Ltd