Non-toxic corrosion inhibitive compositions and methods therefor
AssigneesProducts Research & Chemical Corp., Lockheed Corporation
InventorsAhmed Sharaby, Robert N. Miller
Life of this patent
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Abstract
Elastomeric compositions having incorporated therein certain specific compounds and/or compositions which are non-toxic but render the metals to which the compositions are applied resistant to corrosion, particularly, when in a salt environment.
Claims35
A method of inhibiting corrosion and crack growth of metals exposed to a salt water environment which comprises applying to a metal surface a corrosion and crack growth inhibitive effective amount of a corrosion and crack growth inhibitive composition consisting essentially of:
- (a) at least one water soluble ammonium salt of phosphoric acid, orthophosphorous acid or hypophosphorous acid and;
- (b) cerous molybdate.
A method for inhibiting corrosion and crack growth of two dissimilar metal parts which have a joint therebetween formed by the opposed mating surfaces of said dissimilar metal parts, said method comprising:
- filling said joint with a liquid polymer composition consisting essentially of
- (a) a liquid polymer curable to a solid elastomeric sealant,
- (b) a corrosion and crack growth inhibitive composition consisting essentially of
- (i) at least one water soluble ammonium salt of phosphoric acid, orthophosphorous acid or hypophosphorous acid and
- (ii) cerous molybdate;
- and
- (c) a curing effective amount of a catalyst for curing said liquid polymer to a solid elastomeric sealant, and
- curing said liquid polymer to a solid elastomeric sealant to form a seal in said joint between said opposed surfaces of said dissimilar metal parts.
A composition which, when applied to metals, inhibits the corrosion of such metals, said composition consisting essentially of
- (a) at least one water soluble ammonium salt of phosphoric acid, orthophosphorous acid or hypophosphorous acid and
- (b) cerous molybdate.
Dependencies are inferred from the claim text.