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Effect of Diethylamine Addition on the Sealing Process of 6063 Al Alloy

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Abstract:

To improve the corrosion resistance of Al alloy, diethylamine (DEA) was added into the sealing solutions. The electrochemical behavior of sealing coatings formed in different concentrations of diethylamine (DEA) was investigated by means of polarization curves and electrochemical impedance spectroscopy (EIS). Compared with the coatings with D. I. water and the bare aluminum alloy, the polarization curves show that the sealing coatings formed in 3.0 – 5.0 ml.L-1 diethylamine (DEA) solutions have more positive corrosion potential (Ecorr) and pitting corrosion potential (Epit), and lower corrosion current density (icorr). Electrochemical parameters of EIS indicate that the sealing coatings have higher corrosion resistance. The electrochemical tests present that the prepared sealing coatings have better corrosion resistance.

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Periodical:

Advanced Materials Research (Volumes 557-559)

Pages:

1857-1860

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.557-559.1857

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Online since:

July 2012

Authors:

Hui Cheng Yu, Xiao Xiao Huang, Yi Chun Wei, Dong Ping Wei

Keywords:

Aluminium Alloy, Coating, Corrosion, Diethylamine, Inhibition

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© 2012 Trans Tech Publications Ltd. All Rights Reserved

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