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The Effect of Surface Pretreatment on Water Absorption and Wet Adhesion of Organic Coatings
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The Effect of Surface Pretreatment on Water Absorption and Wet Adhesion of Organic Coatings

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Abstract:

A study was conducted on the effects of surface pre-treatment with 3- aminopropyltriethoxysilane (3-APS) on the water absorption and adhesion behaviour of two commercial alkyd and epoxy polyamide organic coatings on mild steel and glass substrates. The results indicated that using 3-APS as surface pre-treatment prior to coating resulted in a significant reduction of total water absorption for alkyd on both mild steel and glass substrate. Subsequently ile adhesion of alkyd is enhanced on both pre-treated mild steel and glass substrate. However 3-APS pre-treatment of mild steel increases water absorption of epoxy and lowers its adhesion strength. While 3-APS pre-treatment of glass reduces water absorption of epoxy and subsequently enhances the overall wet adhesion. These data are consistent with the known adsorption behaviour of 3-APS to steel, i.e. as an easily hydrolysed hydrogen-bond to the amine group, rather than as the more stable metal-oxide-silicon bond.

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Periodical:

Materials Science Forum (Volume 517)

Pages:

1-4

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.517.1

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Online since:

June 2006

Authors:

Mohamad Kamal Harun, S.N.A.S. Ismail, M.Z.A. Yahya, Stuart B. Lyon

Keywords:

3-Aminopropyl Triethoxysilane, Alkyd, Epoxy Polyamide, Water Absorption, Wet Adhesion

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© 2006 Trans Tech Publications Ltd. All Rights Reserved

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