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| Influence of Surface Roughness of Galvanized Steel Sheet on Self-lubricated Coating |
| Xin LIU1,2,Wu-gang YU1,Qi-fu ZHANG1,She-ming JIANG1 |
1. National Engineering Laboratory of Advanced Coating Technology for Metal Materials, Central Iron and Steel Research Institute, Beijing 100081, China
2. School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China |
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Abstract Three different thicknesses of self-lubricated coatings were prepared on galvanized steel sheets with different surface roughness (Ra). Performances of the coatings were evaluated by various laboratory tests. Scanning electron microscopy (SEM), atomic force microscope (AFM), neutral salt spraying test (NSST), reciprocating friction and wear test were taken in order to characterize the coatings. Results show that the self-lubricated coating has good corrosion resistance and lubricating property. In 0. 857-1. 629 ��m of Ra value, the relationship between friction coefficients of the self-lubricated steel sheets and the surface roughness of the galvanized steel sheets likes a parabolic curve, and has a peak value of friction coefficient in certain range of Ra. Affected by the hereditary surface topography of the galvanized steel sheet, dents on the surface of self-lubricated steel become deeper and larger with the increase of the surface roughness of the galvanized steel sheets. The influence of the surface roughness of the galvanized steel sheet on the corrosion resistance of the self-lubricated coating steel is similar to that on friction coefficient of self-lubricated coatings, like a parabolic curve.
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Received: 23 September 2013
Published: 19 March 2014
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| Fund:National Outstanding Youth Science Foundation of China;National Outstanding Youth Science Foundation of China |
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Corresponding Authors:
Xin LIU
E-mail: 15810531277@163.com
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2014, Vol. 21 
