Technical and Performance Study of Ti-W Composite Chemical Conversion Coating on Aluminum Alloy

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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°C、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 X-ray 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.

Info:

Periodical:

Advanced Materials Research (Volumes 129-131)

Edited by:

Xie Yi and Li Mi

Pages:

819-823

DOI:

10.4028/www.scientific.net/AMR.129-131.819

Citation:

Y. B. Wu et al., "Technical and Performance Study of Ti-W Composite Chemical Conversion Coating on Aluminum Alloy", Advanced Materials Research, Vols. 129-131, pp. 819-823, 2010

Online since:

August 2010

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$38.00

[1] Ajit Kumar Mishra and R. Balasubramaniam. Cor Sci. Vol. 49 (2007), pp.1027-1044.

[2] J. Zhao, L. Xia, A. Sehgal, D. Lu, R.L. McCreery and G.S. Frankel. Surf. Coat. Technol. Vol. 140 (2001), pp.51-57.

[3] L. Xia, E. Akiyama, G. Frankel and R. McCreery. Electrochem. Soc. Vol. 147 (2000), p.2556.

[4] J. Zhao, G. Frankel, R.L. and McCreery. Electrochem. Soc. Vol. 145 (1998), p.2258.

[5] A.S. Hamdy, A.M. Beccaria, P. Traverso, Surf. InterfaceAnal. Vol. 34 (2002), p.171.

[6] O. Lunder, C. Simensen, Y. Yu, K. Nisancioglu. Surf. Coat. Technol. Vol. 184 (2004), pp.278-290.

[7] T. Schram, G. Goeminne, H. Terryn, W. Vanhoolst, P. Van Espen, Transactions of the Instute of Metal Finishing Vol. 73 (1995), p.91.

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