Corrosion inhibiting pigment
AssigneeColores Hispania, S.A.
InventorsJuan Aubareda Vallvey, Oscar Leblanc Francia, Martorell Sole
Life of this patent
Estimating the term…
Abstract
The pigment is constituted by zinc phosphate dihydrate or tetrahydrate with an excess of from 0.5 to 6% of zinc oxide over the stoichiometric amount and has the form of rough surfaced spheroids having a maximum dimension lying between 0.5 and 6 microns and a mean size lying between 1.5 and 2.5 microns.
Claims5
A corrosion inhibiting pigment obtained by the reaction of phosphoric acid and zinc oxide, which pigment consists essentially of zinc phosphate dihydrate or tetrahydrate or a mixture of both and an amount of zinc oxide in free or mixed crystal form in an amount of from 0.5 to 6% over the stoichiometric amount required for the reaction of zinc oxide and phosphoric acid, and consisting essentially of spheroids having a rough surface the maximum dimension of which lies between 0.5 and 6 microns and having a mean size between 1.5 and 2.5 microns.
Dependencies are inferred from the claim text.