Technical and Performance Study of Ti-W Composite Chemical Conversion Coating on Aluminum Alloy
Ti-W composite coating was made by chemical conversion method on aluminum alloy. By orthogonal experiment, the optimal coating-forming conditions were the concentration ratio of TiOSO4 and Na2WO4 was 0.3 g/L:0.3 g/L、KMnO4 1.0 g/L、 NaF 1.0 g/L、 reaction temperature 40 ℃、reaction time 2min. The morphology of the coating was observed by scanning electron microscopy (SEM). Coating composition and the microcosmic phase structure were characterized using energy dispersive X-ray (EDX) analysis and Xray diffraction (XRD) respectively. Electrochemical test was used to study the coatings corrosion resistance. The results indicated that the composite chemical conversion coating is a crystal structure material that composites with Al、Mn 、W、 Ti et al., its surface appears as a accumulation of fibroid spherical particles, the crystallinity of conversion coating is better than uncoated sample obviously. The corrosion potential of the coating is improved to 0.440V, they were both prove the corrosion resistance has improved.
aluminum alloy chemical conversion coating Ti-W composite corrosion resistance
Yanbo Wu Sisi Zeng Peng Sun
College of environmental and chemical engineering,Dalian Jiaotong University,P.R.China
国际会议
2010 International Conference on Material and Manufacturing Technology(2010材料与制造技术国际会议 ICMMT2010)
重庆
英文
819-823
2010-09-17（万方平台首次上网日期，不代表论文的发表时间）