Deborah R O'Brien

US Patent:

58688196, Feb 9, 1999

Filed:

May 20, 1996

Appl. No.:

8/650188

Inventors:

Donald J. Guhde - Euclid OH
Terry E. Dorsett - Chardon OH
Deborah A. O'Brien - Chardon OH
Walter H. Gunn - Painesville OH
Victor V. Germano - Mentor OH

Assignee:

Metal Coatings International Inc. - Chardon OH

International Classification:

C23F 1100
B32B 904

US Classification:

106 1414

Abstract:

There is disclosed a water-reducible, chromium-free coating composition for providing corrosion protection to a substrate, such as a metal substrate. The deposited coating film is corrosion-resistant and for coated articles which are threaded, e. g. , steel fasteners, the coating provides a non-thread-filling coating. The coating composition contains particulate metal, such as particulate zinc or aluminum. Although substituents can be separately packaged, the composition is virtually always a one-package coating composition. The composition contains water-reducible organofunctional silane, particularly an epoxy functional silane, as a binding agent. The composition has highly desirable, extended shelf life. The composition can be easily applied in the usual manner, such as dip-drain or dip-spin technique, and readily cures at elevated temperature.