C - Chemistry – Metallurgy – 23 – F
Patent
C - Chemistry, Metallurgy
23
F
C23F 13/00 (2006.01) C04B 41/53 (2006.01) C04B 41/72 (2006.01)
Patent
CA 2076436
ABSTRACT OF THE DISCLOSURE A method and apparatus for the removal of chlorides from steel reinforced concrete utilizes an electrode with a rectifier impressing a voltage between the steel of the concrete and the electrode. The electrode and the surrounding concrete are saturated continuously with a controlled flow of an aqueous electrolyte. The aqueous electrolyte which may be water or salt water increases chloride movement within the concrete away from the steel reinforcing and improves the efficiency of the process by maintaining a saturated pore structure within the concrete. To facilitate such saturation of the concrete and electrode, the electrode may be immersed in a matrix of a porous water absorbing medium contained within a non-metallic membrane or jacket cover. In some forms a collecting bin or reservoir is provided at the bottom to collect the aqueous solution for recirculation. For offshore or other installations no collecting reservoir may be required. The aqueous solution may also be obtained from a continuous expendable supply. The electrode, porous medium and membrane jacket cover, with or without the collecting reservoir, is provided in a pre- assembled reusable package. The assembly may readily be transported and mounted to or dismounted form the concrete structure.
Corrpro Companies Inc.
Macrae & Co.
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