Protection of Steel Corrosion in Concrete Members by the Combination of Galvanic Anode and Nitrite Penetration

Abstract

Chloride induced-corrosion of steel bars in concrete can make cracks and exfoliation in near-surface regions in reinforced concrete structures. In this paper, we described the basic concept and practice of steel bars corrosion protection method by the combination of galvanic anode (zinc wire) and the penetration of nitrite ions from mortar layers containing a large amount of lithium nitrite.

Evaluation of the Corrosion Behavior of Reinforced Concrete with an Inhibitor by Electrochemical Impedance Spectroscopy

“…Polycarbonate admixtures were obtained from S.P (Dongnam company, Pyeongtaek, South Korea). Moreover, NaCl (Duksan company, Ansan, Korea) was used as the source of the chloride ions and LiNO 2 (Honjo Chemical, Tokyo, Japan) was used as the corrosion inhibitor [ 21 , 22 ].…”

“…Polycarbonate admixtures were obtained from S.P (Dongnam company, Pyeongtaek, South Korea). Moreover, NaCl (Duksan company, Ansan, Korea) was used as the source of the chloride ions and LiNO 2 (Honjo Chemical, Tokyo, Japan) was used as the corrosion inhibitor [21,22]. KS D 3504 D13 rebars (SD400, Hyundai steel, Seoul, Korea) were used for reinforcing concrete [23], and were preprocessed with sandpaper and acetone (Duksan Company, Ansan, Korea) to remove any preexisting corrosion products and accelerate corrosion by peeling off the coating on the surface of the rebar.…”

Effect of NaNO2and C6H15NO3Synergistic Admixtures on Steel-Rebar Corrosion in Concrete Immersed in Aggressive Environments

“…Nitrites are well-known corrosion inhibiting substance [2,5,15,18] although they suffer the setback that their use is being restricted in many countries due to their toxicity and hazardousness to the environmental ecosystems [1,19,20]. This is fostering research deliberations on the search for more environmentally friendly substances for totally or partially replacing the traditional but toxic inhibitor.…”