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

Abstract:

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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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$35.00

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