Galvanic anode system for the corrosion protection of steel in concrete
AssigneeSika Technology AG
InventorWolfgang Schwarz
Life of this patent
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Abstract
A galvanic anode system for the corrosion protection of steel in concrete includes a galvanic anode material, which includes of zinc and alloys thereof, embedded in a solid electrolyte, and is characterized in that the galvanically available surface is larger, preferably at least twice as large, as the total geometrical surface of the metal anode. The galvanic anode system is also characterized in that, during operation, during which the anode disintegrates as a sacrificial anode, the galvanically active anode surface is reduced only slightly, preferably is not reduced up to at least 50%, in particular 75%, of the time during use.
Claims14
A galvanic anode system for corrosion protection of steel in concrete, the galvanic anode system comprising a galvanic stacked anode embedded into an ion-conductive matrix, wherein:
- the galvanic stacked anode is composed of layered galvanic sub-anodes comprising holes, the sub-anodes each being selected from perforated plate, perforated sheet, grid and mesh, composed of zinc or an alloy thereof,
- the thickness of each of the sub-anodes is ≤twice the hole diameter of the holes in the respective sub-anode, and as a result of the thickness of the sub-anodes, the hole diameter of the holes in the sub-anodes, and a distance between each of the sub-anodes, the sub-anodes are galvanically activated one after the other during operation of the galvanic anode system, and
- the geometric total volume of the stacked anode is at least 2.3 times as high as the volume of the zinc or alloy thereof, such that the galvanically available surface area of the galvanic stacked anode is greater than its geometric total surface area.
Dependencies are inferred from the claim text.