Protective coating for cathodically protected metal surfaces

Details Protective coating for cathodically protected metal surfaces Protective coating for cathodically protected metal surfaces

1979-12-04

1981-07-21

Thibodeau, Paul J.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Physical dimension specified

427409, 427410, 428414, 428418, 4284233, 4284259, 428468, 428402, B32B 1508, B32B 1518

Patent

active

042799627

ABSTRACT:
To provide a cover coating for metal surfaces subject to corrosion by water, typically steel surfaces in salt water, for ships, structural components, and the like, in which cathodic protection by application of a negative voltage to the metal is provided, a two-layer coating is applied in which the base coating applied to the metal comprises a mixture of finely divided zinc and polyisocyanate prepolymers capable of hardening or curing under ambient humidity, with dryers, gelling, and pigment agents, and high boiling point solvents, covered by a cover coating, preferably in two to three layers, of a mixture of tar with polyisocyanates, fillers, dryers, solvents, and micaceous iron ore or hematite powder.

REFERENCES:
patent: 3360391 (1967-12-01), Richzenhain et al.
patent: 3499783 (1970-03-01), Nelson et al.
patent: 3598659 (1971-08-01), Klingler et al.
patent: 3756845 (1973-09-01), Zasadny et al.

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