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US 11,519,077 B2Granted
Galvanic anode and method of corrosion protection
AssigneeConstruction Research & Technology GmbH
InventorFrederick R. Goodwin
Life of this patent
Estimating the term…
Abstract
A hybrid sacrificial galvanic anode, an anodic system including the hybrid sacrificial anode, and a method of cathodically protecting steel reinforcement in concrete structures is provided. The hybrid anode provides initial steel polarization followed by long term galvanic protection without the use of batteries or external power supplies.
Claims27
A sacrificial anode body comprising:
- a first sacrificial metal;
- a second sacrificial metal, said second sacrificial metal being less electrochemically negative than said first sacrificial metal, wherein said first sacrificial metal and said second sacrificial metal are more electrochemically negative than steel;
- an encasement material comprising a porous mortar at least partially covering said first and second sacrificial metals;
- an insulative adhesive spacer in contact with said encasement material and having a compressible adhesive capable of absorption of corrosion products from said first and/or second sacrificial metal, wherein the insulative adhesive spacer is adhesively attached to said anode body to provide electrical and ionic insulation and an electrical and ionic path to optimize charge distribution around the anode;
- and
- at least one elongated electrical conductor electrically connected to said anode body.
3 more elements
An assembly for reducing the corrosion of steel reinforcement in a concrete structure comprising:
- an anode body comprising a first and second sacrificial metal, said first sacrificial metal being more electrochemically negative than steel, said second sacrificial metal being less electrochemically negative than said first sacrificial metal;
- said first sacrificial metal and/or said second sacrificial metal at least partially covered with an encasement material comprising a porous mortar;
- an insulative adhesive spacer in contact with said encasement material and having a compressible adhesive capable of absorption of corrosion products from said first and/or second sacrificial metal wherein the insulative adhesive spacer adhesively attaches said anode body to said steel reinforcement and provides electrical and ionic insulation and an electrical or ionic path spacer to optimize charge distribution around the anode;
- and
- at least one electrical conductor for electrically connecting said anode body to said steel reinforcement.
2 more elements
Dependencies are inferred from the claim text.