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US 3,976,617 AGranted
Corrosion inhibiting system containing zinc and zinc phosphate
AssigneeE. I. Du Pont de Nemours and Company
InventorJoseph A. Vasta
Life of this patent
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Abstract
A galvanic action corrosion-inhibiting system which comprises particulate zinc and a water-insoluble zinc salt, useful in coating compositions, particularly coating compositions used to coat interiors of water heater tanks.
Claims4
In a galvanic action corrosion-inhibiting coating composition suitable for lining the interior surface of a water heater tank, the composition consisting essentially of
- a. polyvinylidene fluoride, 5-90% by weight of the binder components;
- b. a condensation product of Bisphenol A or Bisphenol F and epichlorohydrin, 5-90% by weight of the binder components;
- c. an aminoplast resin, 5-90% by weight of the binder components;
- d. particulate zinc, 50-900% by weight of the binder components;
- and
- e. a liquid carrier;
- the improvement comprising the presence in the composition of an effective amount of zinc phosphate.
4 more elements
Dependencies are inferred from the claim text.