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| study on corrosion electrochemical behavior of silane coating with flaked |
| Zhou Wen-Juan;Likun Xu;Jia Wang;;; |
| 中船重工725所 |
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Cite this article:
Zhou Wen-Juan; Likun Xu; Jia Wang. study on corrosion electrochemical behavior of silane coating with flaked. Acta Metall Sin, 2007, 43(9): 983-988 .
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Abstract The corrosion electrochemical behavior of a silane coating with flaked Zn-Al powder on carbon steel was studied in 3.5％ NaCl solution using open circuit potential monitoring, potentiodynamic polarization, electrochemical impedance spectroscopy(EIS) and scanning electron microscope(SEM). The results indicated that the process of deterioration of the coating presented three stages with immersion. At the initial stage, the flaked zinc powder on the surface layer of the coating started to activate with the attack of the electrolyte; the middle stage showed the feature of electrochemical protection of the coating for the substrate; and the barrier protection of the coating predominated in the last stage. The middle stage lasted a long period while the third stage had a short time, suggesting a strong cathodic protection and a weak barrier mechanism of corrosion prevention of the silane coating with zinc and aluminum powder.
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Received: 16 January 2007
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