Study on Sealing Technology for Micro-Arc Oxidation Ceramic Coatings of Aluminium

Shi Jie Li; Pan Pan Li; Xiao Ming Cao; Ming Wen

doi:10.4028/www.scientific.net/AMR.602-604.1591

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 602-604Study on Sealing Technology for Micro-Arc...

Study on Sealing Technology for Micro-Arc Oxidation Ceramic Coatings of Aluminium

Abstract:

A new green sealing treatment, involving the use of bidirectional pulse power supply to the micro-arc oxidation ceramic coatings on Al substrate immersed in a solution of aluminum nitrate, has been developed. The best parameters of pulse sealing was obtained through single factor analysis and orthogonal experiment: frequency is 200Hz, the rations of positive and negative are both for 40%, sealing voltage is 80V, electrolyte concentration is 20g/L, sealing time is 30min. The polarization curve of sealing around the ceramic membrane in the mass fraction of 5% NaCl (PH=7) solution was tested. The results show that the ceramic membrane corrosion resistance after pulse sealing has been significantly improved.

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Periodical:

Advanced Materials Research (Volumes 602-604)

Pages:

1591-1595

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.602-604.1591

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Online since:

December 2012

Authors:

Shi Jie Li, Pan Pan Li, Xiao Ming Cao, Ming Wen

Keywords:

Ceramic Membrane, Micro-Arc Oxidation (MAO), Pulse Power, Sealing

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