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- W3143521431 abstract "The corrosion behavior of copper beneath a droplet of 0.6 mol/L NaCl solution was studied by means of wire beam electrode technique combined with electrochemical impedance spectroscopy(EIS). The results show that the distribution of galvanic current remains negative at the center and positive at the periphery of copper surface covered by the droplet at the initial stage. And the polarity reversed with the extension of time, i.e. the positive one at the center and the negative one at the periphery. To study more comprehensively, the EIS measurement was conducted at an interval of 2 h for two copper wires selected separately at the center and the periphery, and the change of the local impedances was found consistent with that of the current distributions. Meanwhile, the surface morphology of the electrode and the composition of the corrosion products were also examined by using scanning electron microscope(SEM) and energy dispersive spectrometer(EDS). At the beginning, reddish brown oxide products formed much quickly and earlier at the periphery rather than at the center. Then, with the extension of time, the electrode surface was totally covered by corrosion products from the periphery to the center. But, the corrosion products film at the center was severely damaged and replaced by malachite green products, while that remained less destructed relatively at the edge. Further, the corrosion mechanism of copper beneath the droplet was explored that it was the formation and transformation of the corrosion products dominated the changes of the distribution of the corrosion current." @default.
- W3143521431 created "2021-04-13" @default.
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- W3143521431 date "2014-01-01" @default.
- W3143521431 modified "2023-09-24" @default.
- W3143521431 title "Study of Corrosion Behavior of Copper Beneath a Droplet by Means of Wire Beam Electrode Technology" @default.
- W3143521431 hasPublicationYear "2014" @default.
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