| XU Qiao-yu,ZUO Xi.Study on Process of Metavanadate Conversion Coating on Hot-dipped Galvanizing Coating[J],39(4):69-72 |
| Study on Process of Metavanadate Conversion Coating on Hot-dipped Galvanizing Coating |
| Received:April 18, 2010 Revised:August 10, 2010 |
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| DOI： |
| KeyWord:hot-dipped galvanizing metavanadate conversion coating corrosion resistance |
| Author | Institution |
| XU Qiao-yu |
College of Materials Science and Engineering,South China University of Technology, Guangzhou , China |
| ZUO Xi |
College of Materials Science and Engineering,South China University of Technology, Guangzhou , China |
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| Abstract: |
| In order to improve the corrosion resistance of the hot-dipped galvanizing coating, reduce the pollution to the environment, the non-toxic passivition process by metavanadate for hot-dipped galvanizing coating was investigated. Effects of bath composition, pH, treatment temperature and time on the properties of passivition film were discussed. The results show that the optimum process parameters range for the metavanadate conversion coating are NaVO3 5 g/ L, pH1.3,25～ 30℃ ,10～ 30 min. The results of neutral salt spray(NSS)test,adhesion test and electrochemical polarization test show that the coating with better corrosion resistance and good adhesion is obtained by the optimum process. |
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