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US 2019/0017179 A1Published application
Galvanic anode and method of corrosion protection
AssigneeConstruction Research & Technology GmbH
InventorFrederick R. GOODWIN
Life of this patent
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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.
Claims20
A sacrificial anode body comprising:
- a first sacrificial metal;
- a second sacrificial metal, said second sacrificial metal 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;
- 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 more electrochemically negative than steel, said second sacrificial metal 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;
- and
- at least one electrical conductor for electrically connecting said anode body to a reinforcing steel element.
2 more elements
Dependencies are inferred from the claim text.