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Electrochemical behaviour of LY12CZ under applied stress
Rao Sixian, Zhang Yubo, Zhu Liqun, Zhong Qunpeng*
School of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China

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�ؼ����� ���Ӧ��   �ֲ���ʴ   �绯ѧ�迹��   ��ѧ��ѧЧӦ   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.
Keywords�� applied stress   localized corrosion   EIS(electrochemical impedance spectroscopy)   MCE(mechanochemical effect)   LY12CZ     
Received 2006-11-01;


About author: ��˼��(1978-),��,������Ѩ��,��ʿ��,raosixian@mse.buaa.edu.cn.
��˼��,����,����Ⱥ,��Ⱥ��.���Ӧ���µ�LY12CZ�绯ѧ��Ϊ[J]  �������պ����ѧѧ��, 2007,V33(10): 1246-1250
Rao Sixian, Zhang Yubo, Zhu Liqun, Zhong Qunpeng.Electrochemical behaviour of LY12CZ under applied stress[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2007,V33(10): 1246-1250
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