Chemisorption mechanism and effect of polyacrylic acid on the improvement in bond durability of zinc phosphate-to-polymer adhesive joints

It has been found that the outermost surface sites of polyacrylic acid-complexed crystalline zinc phosphate layers precipitated on cold-rolled steel surfaces act significantly to promote interfacial adhesive bonding to polymeric topcoats. This is the result of electrostatic internal diffusion and se...

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Bibliographic Details
Published in:Journal of materials science 1987-02, Vol.22 (2), p.722-736
Main Authors: SUGAMA, T, KUKACKA, L. E, CARCIELLO, N, WARREN, J. B
Format: Article
Language:English
Subjects:
Applied sciences
Exact sciences and technology
Other techniques and industries
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Summary:It has been found that the outermost surface sites of polyacrylic acid-complexed crystalline zinc phosphate layers precipitated on cold-rolled steel surfaces act significantly to promote interfacial adhesive bonding to polymeric topcoats. This is the result of electrostatic internal diffusion and segmental chemisorption mechanisms of polyelectrolyte macromolecules either on newly precipitated crystal nuclei or on crystal growth sites during the primary zinc phosphate conversion process. The nature of the polymer-to-polymer chemical bond produced at the polymer-to-complex zinc phosphate precoat interfacial joints plays the key role in the achievement of long-term bond durability upon exposure to chemically corrosive environment.
ISSN:0022-2461
1573-4803
DOI:10.1007/BF01160794