METHOD FOR PREVENTING CORROSION OF IRON BAR IN CONCRETE

• Main Authors: OTANI SHUNSUKE, SONE YUKIHIRO
• Format: Patent
• Language: English
• Published: 19.09.2013
• Subjects: CHEMICAL SURFACE TREATMENT; CHEMISTRY; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; DIFFUSION TREATMENT OF METALLIC MATERIAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; METALLURGY; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLICMATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASSC23 AND AT LEAST ONEPROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25; NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE

PROBLEM TO BE SOLVED: To provide a method for preventing the corrosion of iron bars in concrete, which can stably generate a large electric current by keeping anodes always in an activated state to thereby overcome the problem that the generated current in a corrosion prevention method using a conventional anode material is small, and especially can prevent re-degradation due to macrocell corrosion arising from patch repair.SOLUTION: In a method for preventing the corrosion of iron bars in concrete comprising embedding anode materials A in a concrete opening 11 where iron bars are exposed, making electrical connection between each anode material A and an iron bar 12, and filling the opening with a patch repair material, the anode material A used is an anode material prepared by covering the surface of an arbitrarily shaped aluminum alloy or zinc alloy 1 with a gel layer 4 containing a chloride, attaching a cloth material 5 containing a chloride on the gel layer 4, and coating its surface with a cementitious material 6.