Effect of Annealing Heat Treatment to Characteristics of AlDC8 (Al-Si-Cu) Alloy

문경만; 이성열; 이명훈; 백태실; 정재현

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자료유형: 학술저널

저자정보: 문경만 이성열 이명훈 백태실 정재현

저널정보: 한국부식방식학회 Corrosion Science and Technology Corrosion Science and Technology 제14권 제6호

발행연도: 2015.1

수록면: 296 - 300 (5page)

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연구주제

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연구배경

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연구방법

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연구결과

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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.

#intergranular corrosion #annealing heat treatment #cyclic voltammogram #AC impedance #corrosion current density

참고문헌 (16)

참고문헌 신청

A. Hellawell / 1990 / supplementary Volume 2 of the Encyclopedia of Material Science and Engineering / Oxford Pergamon : 115 ~

A. Sakamoto / 1991 / / proceedings of the Advanced Materials and Technology 2nd International Conference : 165 ~

D. H. Jeon / 1985 / Corrosion and Corrosion control / Il Jung Publication Co. Ltd : 220 ~

Deny A. Jones / 1996 / Principles and Prevention of Corrosion / Pearson Education : 618 ~

E. A. Starke / 1979 / proceedings of the Materials Science / ASM, Metals Park : 208 ~

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