© 2006 by Taylor & Francis Group, LLC

64 Corrosion Control Through Organic Coatings
after application of the coating. The expectation was that the acidic or basic components,
or both, of the steel’s surface energy would increase immediately after the
coatings were applied. Instead, the total surface energy of the steel decreased, and
the Lewis base component dropped dramatically. The contact-angle measurements
after contact with the coatings were more typical of polymers than of cold-rolled
steel. Spectroscopy studies showed carboxyl and alkane groups on the surface of
the steel after two minutes’ exposure to the paint. Atomic force microscopy showed
rounded particles of a softer material than steel distributed over the surface after a
short exposure to the coatings. The authors speculated that the adhesion promoters
on the polymer chain are so effective that the first particles of polymer are already
attached to the steel after 20 seconds — in other words, before any deformation due
to water evaporation could have occurred. The effects of this immediate bonding on
immediate and long-term corrosion protection are unknown. Better knowledge of
the processes taking place at the coating-metal interface immediately upon application
of the coating may aid in understanding and preventing undesirable phenomena
such as flash rusting.
REFERENCES
1. Hawkins, C.A., Sheppard, A.C., and Wood, T.G., Prog. Org. Coat., 32, 253, 1997.
2. Padget, J.C., J. Coat. Technol., 66, 89, 1994.
3. Misev, T.A, J. Jap. Soc. Col. Mat., 65, 195, 1993.
4. Snuparek, J. et al., J. Appl. Polym. Sci., 28, 1421, 1983.
5. Gauthier, C. et al., ACS Symposium Series 648, Film Formation in Water-Borne
Coatings, Provder, T., Winnik, M.A., and Urban, M.W., Eds., American Chemical
Society, Washington, 1996.
6. Gilicinski, A.G., and Hegedus, C.R., Prog. Org. Coat., 32, 81, 1997.
7. Lin, F. and Meier, D.J. Prog. Org. Coat., 29, 139, 1996.
8. Visschers, M., Laven, J., and van der Linde, R., Prog. Org. Coat., 31, 311, 1997.
9. Visschers, M., Laven, J., and German, A.L., Prog. Org. Coat., 30, 39, 1997.
10. Brown, G.L., J. Polym. Sci., 22, 423, 1956.
11. Mason, G., Br. Polym. J., 5, 101, 1973.
12. Lamprecht, J., Colloid Polym. Sci., 258, 960, 1980.
13. Nicholson, J., Waterborne Coatings: Oil and Colour Chemists’ Association Monograph
No. 2, Oil and Colour Chemists’ Association, London, 1985.
14. Franks, F., Water, Royal Society of Chemistry, London, 1983.
15. Forsgren, A. and Palmgren, S., Effect of Application Climate on Physical Properties
of Three Waterborne Paints, Report 1997:3E, Swedish Corrosion Institute,
Stockholm, 1997.
16. Kobayashi, T., Prog. Org. Coat., 28, 79, 1996.
17. Joanicot, M., Granier, V., and Wong, K., Prog. Org. Coat., 32, 109, 1997.
18. Tzitzinou, A. et al., Prog. Org. Coat., 35, 89, 1999.
19. Wegmann, A., Prog. Org. Coat., 32, 231, 1997.
20. Nysteen, S., Hempel’s Marine Paints A/S (Denmark); personal communication.
21. Sperry, P.R. et al., Langmuir, 10, 2169, 1994.
22. Keddie, J.L. et al., Macromolecules, 28, 2673, 1995.
23. Snyder, B.S. et al., Polym. Preprints, 35, 299, 1994.
24. Heymans, D.M.C. and Daniel, M.F., Polym. Adv. Technol., 6, 291, 1995.
© 2006 by Taylor & Francis Group, LLC