外加应力下的LY12CZ电化学行为

饶思贤; 张玉波; 朱立群; 钟群鹏

外加应力下的LY12CZ电化学行为

北京航空航天大学材料科学与工程学院, 北京 100083

基金项目: 国家重点基础研究发展规划资助项目(G1999065010)

详细信息

作者简介:
饶思贤(1978-),男,湖北武穴人,博士生,raosixian@mse.buaa.edu.cn.

中图分类号: TG 172.82
计量
- 文章访问数: 3323
- HTML全文浏览量: 146
- PDF下载量: 1039
- 被引次数: 0
出版历程
- 收稿日期: 2006-11-01
- 网络出版日期: 2007-10-31

Electrochemical behaviour of LY12CZ under applied stress

School of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China

摘要

摘要: 利用动电位极化和电化学阻抗谱技术对应力加载下的LY12CZ铝合金在3％NaCl水溶液中的腐蚀行为进行了研究,考察了应力作用对LY12CZ在3％NaCl水溶液中的阳极极化行为、自腐蚀电位和破裂电位以及极化电阻和双电层电容大小的影响.结果表明,在加载应力时LY12CZ的阳极极化曲线和自腐蚀电位、破裂电位均明显负移;在浸泡时间相同的情况下,极化电阻也随应力的增加而显著降低,在应变强化阶段力学化学效应达到最大.破裂电位的负移和极化电阻的降低说明应力对LY12CZ的局部腐蚀有明显的影响.
- 外加应力 /
- 局部腐蚀 /
- 电化学阻抗谱 /
- 力学化学效应 /
- LY12CZ
Abstract: Potentiodynamic polarization and electrochemical impedance spectroscopy(EIS) techniques were applied to investigate the corrosion behavior of LY12CZ in 3％NaCl aqueous solution.The effects of stress to anodic polarization behavior,free corrosion potential,breakdown potential,polarization resistance and double-layer capacitance of LY12CZ were summarized.Results show that the polarization curve and breakdown potentials show obvious negative removals,and the mechanochemical effects reached maximum during the strain hardening stage. If stressed,under equivalent immersion time, polarization resistance also decreased significantly with the increase of stress.The nagetive removal of breakdown potential and decrease of polarization resistance indicate that stress plays an important role in the localized corrosion of LY12CZ.
- applied stress /
- localized corrosion /
- EIS(electrochemical impedance spectroscopy) /
- MCE(mechanochemical effect) /
- LY12CZ

HTML全文

参考文献(1)

[1] Ben Hamua G,Eliezer A,Gutman E M,et al. Mechanoelectrochemical behavior of magnesium alloys[J]. Materials Science and Engineering A,2006,420(1/2):109-114 [2] Blank Ch,Mankowsk G. Pit propagation rate on the 2024 and 6056 aluminum alloys[J].Corrosion Science, 1998,40(2/3):411-429 [3] Pride S T,Scully J R, Hudson L J. Metastable pitting of alumunum and criteria for the transition to stable pit growth[J]. J Electrochem Soc,1994,141(11):3028-3040 [4] Conde A, De Damborenea J. Electrochemical impedance study of a natural aged Al-Cu-Mg alloy in NaCl[J]. Corrosion Science,1997,39(2):295-303 [5] Guillaumin V,Mankowski G. Localized corrosion of 2024T351 aluminum alloy in chloride media[J].Corrosion Science,1999,41(3):421-438 [6] Szklarska Smialowska Z. Pitting corrosion of aluminum[J].Corrosion Science,1999,41(9):1743-1767 [7] Blanc C,Lavelle B,Mankowski G. Role of precipitates enriched with copper on the susceptibility to pitting corrosion of the 2024 aluminium alloy[J]. Corrosion Science,1997,39(3):495-510 [8] 王政富,李劲,王俭秋,等.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 Wang Zhengfu, Li Jin,Wang Jianqiu, et al. Effects of strain amplitude and strain rate to corrosion acceleration of deformation[J]. Acta Metallurgica Sinica,1994,30(5):213-217(in Chinese) [9] 王俭秋.腐蚀疲劳过程中形变与电化学交互作用研究 .沈阳:中国科学院金属腐蚀与防护研究所,1995 Wang Jianqiu. Research on the interaction of deformation and electrochemistry in corrosion fatigue .Shenyang:Institute of Metal Research,Chinese Science Academy, 1995(in Chinese) [10] 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 Wang Jingru,Zhu Liqun, Rao Sixian. Strain electrode of A3 steel under elastic deformation[J]. Journal of Chinese Society for Corrosion and Protection,2005,25(4):226-231(in Chinese) [11] Liu Xiaodong,Frankel G S,Zoofan B, et al. Effect of applied tensile stress on intergranular corrosion of AA2024-T3[J].Corrosion Science, 2004,46(2):405-425 [12] Liu Xiaodong,Frankel G S. Effects of compressive stress on localized corrosion in AA2024-T3[J].Corrosion Science,2006,48(10):3309-3329 [13] 何建平,樊蔚勋,袁庆铭,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 He Jianping,Fan Weixun, Yuan Qingming. Study on corrosion properties of aluminum alloys at low strain rate[J]. Journal of Chinese Society for Corrosion and Protection,2003,23(1):17-20(in Chinese) [14] 湖南大学金属腐蚀防护组.金属腐蚀研究方法[M].长沙:湖南大学出版社,1997:121-122 Corrosion and Protection of Metals Laboratory of Hunan University. Research techniques of corrosion on metals[M].Changsha:Publication of Hunan University,1997:121-122(in Chinese) [15] 饶思贤,朱立群,李荻,等.力学化学效应对LY12CZ铝合金点蚀行为的影响[J].中国腐蚀与防护学报,2007,27(4):228-232 Rao Sixian, Zhu Liqun, Li Di, et al. Effects of mechano-chemistry to the pitting behaviour of LY12CZ aluminum alloy[J]. Journal of Chinese Society for Corrosion and Protection,2007,27(4):228-232(in Chinese) [16] Gutman Э М.金属力学化学与腐蚀防护[M].金石译.北京:科学出版社,1989 Gutman Э М. Mechanochemistry and corrosion prevention of metals[M].Translated by Jin Shi. Beijing:Science Publication,1989(in Chinese) [17] Bonora P,Andrei L M.Corrosion behavior of stressed magnesium alloys[J]. Corrosion Science,2002,44(4):729-749 [18] Ben Hamua G,Eliezer A,Gutman E M. Electrochemical behavior of magnesium alloys strained in buffer solutions [J]. Electrochimica Acta,2006,52(1):304-313 [19] Magnin Th. Advances in corrosion-deformation interactions[M].Switzsland:Trans Tech Publications Ltd,1996 [20] Gutman E M,Solovioff G, Eliezer D. The mechanochemical behavior of type 316L stainless steel[J]. Corrosion Science,1996,38(7):1141-1145

施引文献

资源附件(0)

访问统计