Patent ID: 6521345
Filing Date: 2003-02-18
Classification: B05D,C23C,Y10S,Y10T

Abstract:
A structure, intended for disposition in ambient atmosphere, comprising:at least one part having a substrate comprising an oxidizable ferrous metal surface that is subject to deterioration upon exposure to ambient atmosphere, A. a first coating comprising zinc disposed on and adhered to at least a portion of said oxidizable ferrous metal surface, B. a second coating directly covering at least a portion of said first coating and adhered thereto, wherein said second coating comprises a thermosetting polymer that has been applied by, coating at least a portion of said first coating with a powder comprising a composition that is convertible, by the application of heat, into said thermosetting second coating; subjecting said powder and said substrate to electrostatic charging with opposite d.c. voltage polarities; and heating the powder while under the influence of said electrostatic charging to an extent sufficient to melt said powder and cause it to spread over a desired area of said first coating and to cure said melted powder material to convert it to a thermosetting polymer that is adherent to said first coating; and C. a third coating directly covering at least a portion of said second coating and adhered thereto, wherein said third coating comprises an epoxysiloxane polymer.