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| ANTI-CORROSION PERFORMANCE OF THE MODIFIED SILANE FILMS ON HOT-DIP GALVANIZED STEEL |
| WU Haijiang1;2; YANG Feiying1; LU Jintang2 |
1. School of Electromechanism Engineering; Hunan University of Science and Technology; Xiangtan 411201
2. College of Materials Science and Engineering; South China University of Technology;Guangzhou 510640 |
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Abstract Hot-dip galvanized steel samples have been treated in a solution containing molybdate, phosphate and silane. The distribution of the elements in the coating layers has been determined using Auger electron spectroscopy (AES). The corrosion resistance of the treated samples has been compared to that of bare samples after exposure to 5% NaCl solution using polarization curves and electrochemical impedance spectra (EIS) data. The samples have also been exposed to the salt spray test. The results of these tests suggest that the modified silane coating layer is composed of an outer C-Si-O rich layer and an inner Mo-P-O-Zn rich layer and it is a promising candidate for replacing conventional chromate treatments.
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Received: 17 May 2007
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Corresponding Authors:
WU Hai-Jiang
E-mail: haijiang\_wu@126.com
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