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

1978-07-24

1979-11-20

Kendall, Ralph S.

Metal treatment

Compositions

Heat treating

148 627, C23F 700

Patent

active

041749804

ABSTRACT:
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 environmentally 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.

REFERENCES:
patent: 2383589 (1945-08-01), Bunting et al.
patent: 2854368 (1958-09-01), Shreir
patent: 3397077 (1968-08-01), Boller et al.
patent: 3671331 (1972-06-01), Malkin et al.
patent: 3877998 (1975-04-01), Guhde
patent: 4017334 (1977-04-01), Matsushima et al.
patent: 4039353 (1977-08-01), Kulick et al.
patent: 4054466 (1977-10-01), King
patent: 4111722 (1978-09-01), Reghi et al.

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