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| Seawater Corrosion Performances of 5083 Aluminum Alloy under Antifouling Coating Systems |
| Received:March 28, 2016 Revised:August 15, 2016 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/ issn.1672-9242.2016.04.005 |
| KeyWord:antifouling coating EIS release of cupric ion aluminum alloy corrosion |
| Author | Institution |
| CAO Jing-yi |
Naval Coatings Analysis and Test Center, Beijing , China |
| ZHANG Han-lu |
Naval Coatings Analysis and Test Center, Beijing , China |
| ZHANG Feng |
Middle Road No 19 of XISANHUAN, Beijing , China |
| QUAN Le |
Beijing University of Chemical Technology, Beijing , China |
| TANG Yu-ming |
Beijing University of Chemical Technology, Beijing , China |
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| Abstract: |
| Objective To investigate the seawater corrosion performances of 5083 Aluminum Alloy under different kinds of ship antifouling coating systems. Methods Corrosion resistances of three kinds of ship antifouling coating systems containing different antifouling agents with and without artificial damages were studied by electrochemical impedance spectroscopy. Results The corrosion resistances results of three kinds of ship antifouling coating systems on 5083 aluminum alloy immersed in seawater were obtained. Conclusion For coatings without artificial damages, all the antifouling coating systems had very good protective property on 5083 aluminum alloy. Among them, the antifouling coating with low surface free energy showed the best barrier property and stable performance, this is probably because it was difficult for the coating system with low surface free energy to be hydrolyzed so as to have slight variation of the impedance with immersion time and much lower porosity and bigger reaction resistance of pigment with electrolyte. Under condition of artificial damages of the antifouling coatings, the corrosion rate for three coating systems followed the order of v(low surface free energy coating)﹤v(CuSCN）﹤v(Cu2O）. Therefore, Cu2O in the antifouling coating might accelerate the corrosion of the aluminum alloy. |
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