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 s...
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 $100^{\circ}C$, $200^{\circ}C$, $300^{\circ}C$, $400^{\circ}C$ and $500^{\circ}C$ 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 $100^{\circ}C$, $200^{\circ}C$ and $300^{\circ}C$, while, intergranular corrosion was not nearly observed at annealing temperature of $400^{\circ}C$, $500^{\circ}C$. 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.
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 $100^{\circ}C$, $200^{\circ}C$, $300^{\circ}C$, $400^{\circ}C$ and $500^{\circ}C$ 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 $100^{\circ}C$, $200^{\circ}C$ and $300^{\circ}C$, while, intergranular corrosion was not nearly observed at annealing temperature of $400^{\circ}C$, $500^{\circ}C$. 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.
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제안 방법
In this study, the surface of the test specimen of ALDC 8 alloy may be deposited with oxide film like Al2O3 in seawater solution, thereby anodic polarization curve is able to involve large amount of resistance polarization due to the oxide film. As a result, the corrosion property by using Tafel extrapolation method could not be correctly calculated in all specimens, that is, non heat treated or heat treated specimens.
참고문헌 (16)
H. Y. Lee, Metal Corrosion Engineering, p. 262, Yun kyung Munhwa Publication Co. Ltd., Seoul (1999).
S. K. Suriyama, Non-metal material Engineering, p. 142, Korona. Publication Co. Ltd., Japan (1975).
Mars. G. Fontana, Corrosion Engineering, p. 516, McGraw-Hill Book company, New York (1986).
Deny A. Jones, Principles and Prevention of Corrosion, p. 618, Pearson Education, United States (1996).
J. W. Martin, Precipation Hardening, p. 353, Pergamon Press Oxford, New York (1968).
Y. Murakami, Fundamentals and Industrial Technologies of Aluminum Materials, p. 252, Light Metals Association, Japan (1985).
Y. Murakami, proceedings of the Advanced Materials and Technology 2nd International Conference, p. 113, Kobe, Japan (1991).
A. Hellawell, supplementary Volume 2 of the Encyclopedia of Material Science and Engineering, p. 115, Oxford Pergamon (1990).
W. L Phillips, Annotated Equilibrium Diagram of Some Aluminum Alloy Systems, Monograph, London Int. Metals. 35, 57 (1959).
A. Sakamoto, proceedings of the Advanced Materials and Technology 2nd International Conference, p. 165, New Composites, Hyogo, Japan (1991).
E. A. Starke, proceedings of the Materials Science, p. 208, ASM, Metals Park, Ohio (1979).
J. Gilbert, K, Elwin and L. Rooy, ASM international Materials, p. 61, OH 44073-002 (1965).
S. K. Suriyama, Non metal material Engineering, p. 152, Korona Publication Co. Ltd., Japan (1975).
N. J. Beak, Metal Material Engineering, p. 260, Kawang Rim Publication Co. Ltd., Seoul (1983).
K. M. Moon, J. P. Won, D. H. Park, S. Y. Lee, J. A. Jeong, M. H. Lee, and T. S. Baek, Corros. Sci. Tech., 13, 20 (2014).
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