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US 7,794,626 B2Granted
Cathodic protection compounds
AssigneePolyOne Corporation
InventorStephen D. Horton
Life of this patent
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Abstract
A cathodic protection compound is disclosed. The coating includes sacrificial metallic particles less noble than metal in the metal substrate to be protected. The coating also includes inherently conductive polymer in an amount of less than 1 weight percent of total solids of the coating. A concentrate of the metallic particles and inherently conductive polymer can also be prepared.
Claims11
A cathodic protection compound to protect a metal substrate, comprising:
- (a) inherently conductive polymer comprising polyaniline-grafted-lignosulfonic acid;
- (b) metal particles wherein the metal is less noble than metal of the metal substrate;
- and
- (c) binder,
- wherein the amount of inherently conductive polymer is less than 0.8 weight percent of total solids of the compound and wherein the amount of metal particles is less than 20 percent of the total solids of the compound.
2 more elements
Dependencies are inferred from the claim text.