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Improved Wet Strength Adhesion of Epoxy Coatings to Steel

  • Lionell Graham
  • John A. Emerson

Abstract

A method of treating steel before applying organic coating has been developed. This treatment provides not only corrosion protection under coatings, but also provides high wet adhesion strength between the epoxy polymer and a metal substrate. It involves a method of enhancing the adhesion of epoxies to steel substrates by organic modification of a tin wetting hydrosol (SNS Process). The wet strength adhesion has been determined by a 90° peel test for a variety of test conditions. Strip peel tests were conducted on CTBN rubber toughened, epoxy polymers coated onto cold rolled steel foil. The variations investigated were: a) after coating the substrate with epoxy (initial condition), b) after exposure of the coated part to an aqueous solution at 72±2°C for 24 h (wet condition), and c) following a 150°C bake to remove water from the sample. The adverse effect of water on adhesion for a series of metal treatments were examined.

Keywords

Steel Substrate Immersion Time Corrosion Protection Silane Coupling Agent Epoxy Polymer 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    J. A. Emerson and L. Graham, in preparation.Google Scholar
  2. 2.
    J. T. Kenney, W. P. Townsend, and J. A. Emerson, J. Colloid Interface Sci., 42, 589 (1973).CrossRefGoogle Scholar
  3. 3.
    W. D. Bascom and R. L. Cottington, J. Adhesion, 7, 333 (1976).CrossRefGoogle Scholar
  4. 4.
    W. A. Romanchick, Western Electric,Private Communication, 1980.Google Scholar
  5. 5.
    C. B. Yates and A. M. Wolski, U. S. Patent 3,857, 681, 1974.Google Scholar
  6. 6.
    K. L. Mittal in “Adhesion Measurement of Thin Films, Thick Films, and Bulk Coatings,” ASTM STP 640, K. L.Mittal, Editor, American Society for Testing and Materials, Philadelphia, PA, 1978.CrossRefGoogle Scholar
  7. 7.
    W. Funke, J. Oil Col. Chem. Assoc., 62, 63 (1979).Google Scholar
  8. 8.
    J. S. Hammond, J. W. Holubka, J. E. DeVries and R. A. Dicke, Corros. Sci., 21, 239 (1981).CrossRefGoogle Scholar
  9. 9.
    H. Leidheiser, Jr., Corrosion, 36, 339 (1980)Google Scholar
  10. 10.
    J. A. Emerson and L. Graham, unpublished data.Google Scholar
  11. 11.
    E. H. Andrews and A. J. Kinloch, Proc. Royal Soc. London, 332A, 385, 401 (1973).Google Scholar
  12. 12.
    A. Ahagon and A. N. Gent, J. Polym. Sci., Phys. Ed., 13, 1285 (1975).CrossRefGoogle Scholar

Copyright information

© Plenum Press, New York 1983

Authors and Affiliations

  • Lionell Graham
    • 1
  • John A. Emerson
    • 1
  1. 1.Western Electric Engineering Research CenterPrincetonUSA

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