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| CORRELATION BETWEEN THE PITTING DEPTH OF LY12CZ WITH OR WITHOUT STRESS |
| TONG Jibin1; RAO Sixian1; ZHU Liqun2; ZHONG Qunpeng2 |
1. Department of Mechanical Engineering; Anhui University of Technology; Ma'an'shan 243001
2. School of Material Science and Engineering; Beihang University; Beijing 100083 |
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Abstract The relationship between the pitting depth（Dσ）of LY12CZ in 3%NaCl aqueous solution and applied stress（σ） and corrosion time（t） was calculated，and the results showed that the correlation was accorded with the formula Dσ=AΧC0 exp(bσ)tn=A' tn , the formula indicated that the relationship between pitting depth and applied stress was accorded with exponential function Dσ =D 0 exp(bσ)t n under the same corrosion time and power function Dσ=A' tn under the same applied stress. Experiment results under various applied stress prove that correctness of the formula above, the experimental results showed that pitting data of LY12CZ accords with the same power function Dσ=A' tn no matter what applied stress existed or not, the influence of applied stress was showed in the coefficient of A, the relationship between A'(coefficient A under stress) and σ was Dσ=AΧexp(bσ). so the pitting data of aluminum alloys in natural environment could be extended to the natural environment corrosion under applied stress through amendment to the coefficient A.
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Received: 10 September 2008
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Corresponding Authors:
RAO Sixian
E-mail: raosixian@ahut.edu.cn
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| [1] GutmanЭМ. Mechanochemistry and Corrosion Prevention of Metals [M]. Beijing: Science Publication, 1989
(Э.М. 古特曼. 金属力学化学与腐蚀防护 [M]. 北京: 科学出版社, 1989)
[2] Rao S X, Zhu L Q, Li D, et al. Effects of mechanochemistry to the pitting behavior of LY12CZ aluminum alloy [J], J. Chin. Soc. Corros.Prot., 2007, 27（4）：228-232
(饶思贤，朱立群，李荻等，力学化学效应对LY12CZ点蚀行为的影响 [J]. 中国腐蚀与防护学报，2007, 27（4）：228-232)
[3] Bonora. P. L, Andrei. M. Corrosion hehavior of stressed magnesium alloys [J]. Corros. Sci., 2002, 729-749
[4] Wang Z F, Li J. Effects of strain amplitude and strain rate to corrosion acceleration of deformation [J]. Acta Metall. Sin., 1994, 30(5), 213-217
(王政富, 李劲. 应变幅与应变速率在形变加速腐蚀过程中的作用 [J]. 金属学报, 1994, 30(5), 213-217)
[5] Wang J Q. Research on the interaction of deformation and electrochemistry in corrosion fatigue [D]. Shenyang: Ph. D dissertation of the Institute of Metal Research, Chinese Science Academy, 1995
(王俭秋. 腐蚀疲劳过程中形变与电化学交互作用研究 [D]. 沈阳：中国科学院金属腐蚀与防护研究所博士学位论文, 1995)
[6] Wang J R,Zhu L Q, Rao S X. Strain electrode of A3 steel under elastic deformation [J]. J. Chin. Soc. Corros. Prot., 2005,25（4）：226-231
(王景茹，朱立群, 饶思贤. A3钢在弹性形变范围内的应变电极行为 [J], 中国腐蚀与防护学报, 2005, 25(4): 226-231
[7] Gutman E M, Solovioff G. The mechanochemical behavior of type 316L stainless steel [J]. Corros.Sci., 1996, 38(7): 1141-1145
[8] He J P, Fan W X, Study on corrosion properties of aluminum alloys at low strain rate [J]. J. Chin. Soc.Corros. Prot., 2003, 23(1): 17-20
(何建平，樊蔚勋, 慢应变速率下铝合金的腐蚀行为 [J], 中国腐蚀与防护学报, 2003, 23(1): 17-20)
[9] Hiroyuki I, Takeo O. Effect of applied stress on anodic polarization behaviour and pitting corrosion of stainliess steel [J]. J. Soc. Mater. Sci., 1981, 394-400
[10] FranceJR W D. Effect of Stress and Plastic Deformation on the Corrosion of Steel [C]. The 4th International Congress on Metallic Corrosion, Amsterdam, 1969, 189-199
[11] Liu X D, Frankel G S, Zoofan B, et al, Effect of applied stress on intergranular corrosion of AA2024-T3 [J]. Corros Sci., 2004, 46: 405-425
[12] Ben-Hamua, Eliezer A., Gutman E M, Electrochemical behavior of magnesium alloys strained in buffer solutions [J]. Electrochim. Acta, 2006, 52(1): 304-313
[13] Liu X D, Frankel G S, Effects of compressive stress on localized corrosion in AA2024-T3 [J]. Corros. Sci., 2006
[14] Ben-Hamu. G, Eliezer A., Gutman E M, et al, Mechanoelectrochemical behavior of magnesium alloys [J]. Mater. Sci. Eng., 2006: 109-114
[15] Chen G S, Wan K C, Gao M. et al. Transition from pitting to fatigue crack growth-modeling of corrosion fatigue crack nucleation in a 2024-T3 aluminum alloy [J].Mater. Sci. Eng., 1996 A219: 126-132
[16] Burynski Jr R M, Chen G S,Wei R P, et al. ASME International Mechanical Engineering Congress on Structural Integrity of Aging Aircraft [C]. New York: ASME 1995, 47: 175
[17] Godard H P, Jepson W B, Bothwell M R, et al. The Corrosion of Light Metals [M]. New York: Wiley, 1967: 60.
[18] Cao C N. Natural Environment Corrosion of Materials in China [M]. Beijing: Chemical Industry Press [M], 2005
(曹楚南. 中国材料的自然环境腐蚀. 化学工业出版社 [M], 2005, 北京) |
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