Melamine-formaldehyde and tannin treatment of metal surfaces

Details Melamine-formaldehyde and tannin treatment of metal surfaces Melamine-formaldehyde and tannin treatment of metal surfaces

C - Chemistry, Metallurgy

23

F

117/194

C23F 15/00 (2006.01) B05D 7/16 (2006.01) B32B 15/08 (2006.01) C09D 5/08 (2006.01) C23C 22/68 (2006.01)

Patent

CA 1062098

ABSTRACT OF THE DISCLOSURE Disclosed is a single-application non-electrolytic method for the treatment of bare metal surfaces to form a corrosion- resistant coating. The clean metal surfaces are treated with an aqueous composition containing a melamine-formaldehyde resin and a vegetable tannin. The resulting dried coating exhibits superior qualities for a single-application coating process when used as a paint base and the process does not require the use of environ- mentally objectionable chromium compounds. Application to ferrous zinc or aluminum surfaces may be by any known technique designed to provide a deposited layer of desired uniformity.

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