Electrochemical corrosion behavior of 2A02 Al alloy under an accelerated simulation marine atmospheric environment |
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| Authors: | Min Cao Li Liu Zhongfen Yu Lei Fan Ying Li Fuhui Wang |
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| Affiliation: | 1. Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China;2. Key Laboratory for Anisotropy and Texture of Materials (MoE), School of Materials Science and Engineering, Northeastern University, Shenyang 110819, China;3. University of Chinese Academy of Sciences, Beijing 100049, China |
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| Abstract: | The corrosion behavior of 2A02 Al alloy under simulated marine atmospheric environment has been studied using mass-gain, scanning electron microscope/energy dispersive spectroscopy (SEM/EDS), laser scanning confocal microscopy, X-ray diffraction spectroscopy and localized electrochemical methods. The results demonstrate that the relationship between the corrosion induced mass-gain and the corrosion time is in accordance with the power rule. The mass-gain increases gradually during the corrosion time, while the corrosion rate decreases. With ongoing of the corrosion, corrosion products film changed from a porous to a compact structure. The various spectroscopic data show that the corrosion products films composed mainly of Al(OH)3, Al2O3 and AlCl3. The electrochemical corrosion behavior of the 2A02 Al alloy was studied by electrochemical impedance spectroscopy (EIS). |
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| Keywords: | Thin electrolyte layers Atmospheric corrosion 2A02 Al alloy EIS |
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