Method of galvanizing a portion only of a ferrous metal article

Details Method of galvanizing a portion only of a ferrous metal article Method of galvanizing a portion only of a ferrous metal article

1978-07-13

1979-12-04

Lawrence, Evan K.

Coating processes

Nonuniform coating

Applying superposed diverse coatings or coating a coated base

106 2, 1062866, 1062871, 10628723, 10628735, 427300, 427433, B05D 118, B05D 138

Patent

active

041773039

ABSTRACT:
In a method of galvanizing a portion only of a ferrous metal article, in particular for galvanizing one side only of a thin flat ferrous metal strip, the material used for forming a protective coating on the part of the article not to be galvanized is a suspension comprising a liquid suspending vehicle consisting of water and from 5 to 20% by weight, preferably from 6 to 16%, of the powdered hydrated form of magnesium silicate known as talc. The suspension preferably also includes a bonding or etching agent to increase the adherence of the coating to the article, a wetting agent to facilitate spreading of the coating, a thickener to facilitate the suspension of the powdered material and a defoamer if necessary.

REFERENCES:
patent: 1334092 (1920-03-01), Harmeling
patent: 2894850 (1959-07-01), Greene et al.
patent: 3089780 (1963-05-01), Sipk
patent: 3104993 (1963-09-01), Sievert et al.
patent: 3121019 (1964-02-01), Blay
patent: 3149987 (1964-09-01), Crandall
patent: 3177085 (1965-04-01), Adams
patent: 3178321 (1965-04-01), Satterfield
patent: 3181963 (1965-05-01), Cook et al.
patent: 3398010 (1968-08-01), Harvey et al.
Grant, J. (editor), Hackh's Chemical Dictionary, 4th Ed., McGraw-Hill Book Co., New York City, N.Y., p. 277.

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