Method of galvanising a portion only of a ferrous metal article

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

C - Chemistry, Metallurgy

23

C

117/64

C23C 1/02 (1980.01)

Patent

CA 1108020

Abstract of the Disclosure 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, from S to 20% by weight preferably from 6 to 16%, of the powdered hydrated form of magnesium sili- cate 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.

301060

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