Influence of Surface Roughness of Galvanized Steel Sheet on Self-lubricated Coating

• Published in: Journal of iron and steel research, international Vol. 21; no. 3; pp. 342 - 347
• Main Authors: LIU, Xin, YU, Wu-gang, ZHANG, Qi-fu, JIANG, She-ming
• Format: Journal Article
• Language: English
• Published: Singapore Elsevier Ltd 01.03.2014; Springer Singapore
• Subjects: Applied and Technical Physics; Coating; corrosion resistance; Engineering; Friction; friction coefficient; Galvanized steels; Iron and steel industry; Machines; Manufacturing; Materials Engineering; Materials Science; Metallic Materials; Physical Chemistry; Processes; Self lubrication; self-lubricated; Sheet metal; Steels; Surface roughness; 中性盐雾试验; 原子力显微镜; 扫描电子显微镜; 摩擦磨损试验; 涂料性能; 自润滑涂层; 表面粗糙度; 镀锌钢板; self-lubricated; friction coefficient; corrosion resistance; surface roughness
• ISSN: 1006-706X; 2210-3988
• DOI: 10.1016/S1006-706X(14)60052-2

Three different thicknesses of self-lubricated coatings were prepared on galvanized steel sheets with differ- ent surface roughness （Ra）. Performances of the coatings were evaluated by various laboratory tests. Scanning elec- tron 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 co- efficients 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 topogra- phy of the galvanized steel sheet, dents on the surface of sel~lubricated steel become deeper and larger with the in crease 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 selPlubricated coatings, like a parabolic curve.