羽毛球拍框用6063铝合金表面三价铬转化膜的性能研究

Property Study of Trivalent Chromium Conversion Film on Surface of 6063 Aluminium Alloys for Badminton Racket Frame

羽毛球拍框用AA 6063铝合金其表面采用三价铬转化膜是目前替代六价铬转化膜最具前景的绿色处理工艺。为明确三价铬转化膜在羽毛球拍表面改性的作用,采用高分辨电子显微镜、能谱仪及经典电化学测试手段研究了三价铬转化膜的表面形貌、组分及电化学性能。结果表明:经机械研磨和抛光的铝合金表面存在富铁和锰的二次相颗粒,其表面的转化膜相较于没有颗粒相基体的成膜较厚,且整体均一性和致密性良好;铝合金表面三价铬转化膜的电化学阻抗比没有转化膜的铝合金提高了近2倍,且其较低的电容值与其致密的转化膜结构密切相关。

Trivalent chromium conversion coated AA 6063 aluminium alloy used for badminton racket frame is the most promising alternative with eco-friendly advantages to replace hexavalent chromium conversion coatings.In order to explore the effect of trivalent chromium conversion coating on surface modification of badminton rackets,the high-resolution electron microscopy,energy dispersive energy spectrometer and classic electrochemistry measurement were employed to study surface morphology,components,and electrochemical properties of trivalent chromium conversion coatings.Results showed that after mechanical grinding and polishing treatment,there existed Fe-/Mn-rich secondary phase particles on the surface of aluminium alloys,and the conversion film on the surface was thicker than the substrate without particle phase,which possessed good overall uniformity and compactness.Moreover,the electrochemical impedance of the trivalent chromium conversion coating on the aluminum alloy surface was nearly 2 times higher than that of the aluminum alloy without conversion coating,and its lower capacitance value was closely related to the dense conversion coating structure.