Cathodic protection of metal substrates
AssigneeCopsys Technologies Inc.
InventorFarzad Hashemi
Life of this patent
Estimating the term…
Abstract
A metallic object to be protected from corrosion, such as a steel automobile body panel, is connected to an electron source as a cathode. An electrically isolating coating is disposed on the metallic object. A blanket anode is applied onto the electrically isolating coating. The blanket anode is electrically conductive. A non-metallic electrode is connected to the blanket anode and to the electron source. Hydrogen absorbent mixtures are added to the coating. Capillary action is addressed. Damage to the blanket anode and the electrically isolating coating creates a location for electrolyte to collect to create an electrochemical cell and activate cathodic protection to prevent corrosion of the metallic object.
Claims11
A method for protecting a substrate against corrosion, the method comprising:
- applying a blanket anode onto at least a portion of an electrically isolating coating disposed on a portion of the substrate to be protected from corrosion, wherein the substrate is to connect to an electron source as a cathode;
- connecting a non-metallic electrically conductive connector at a first end to the blanket anode;
- forming a capillary action prevention portion at a second end of the non-metallic electrically conductive connector by:
- applying a coating to a length of the non-metallic electrically conductive connector;
- folding the length of the non-metallic electrically conductive connector into a tight coil while the coating is wet to trap at least a portion of the coating in the folded length;
- and
- drying the coating while the length is folded, such that the dried portion of the coating trapped in the folded length prevents capillary action through the folded length;
- and
- connecting the second end of the non-metallic electrically conductive connector to the electron source at the capillary action prevention portion via a wire.
Dependencies are inferred from the claim text.