The invention discloses a
rust-resistant agent for a concrete reinforcing bar and a preparation method thereof. The
rust-resistant agent for the concrete reinforcing bar is prepared based on a gas-phase
corrosion inhibitor prepared by reacting a
dicarboxylic acid with organic amine. The
rust-resistant agent for the concrete reinforcing bar comprises the following raw materials in percentage by
mass: 5 to 10 percent of
sodium monofluorophosphate, 2 to 5 percent of
calcium gluconate, 20 to 40 percent of the gas-phase
corrosion inhibitor and the balance of water. The rust-resistant agent for theconcrete reinforcing bar of the invention does not comprise
nitrite, comprises the gas-phase
corrosion inhibitor and has a function of migrating and diffusing in the concrete. Compared with the traditional rust-resistant agent for the reinforcing bar, the rust-resistant agent for the concrete reinforcing bar has the advantages of excellent corrosion inhibition and rust-resistant properties, high environmentally-friendly property and the like, can be widely applied to fresh
reinforced concrete construction of harbour
engineering, coastal buildings, buildings in
saline and alkaline lands and other buildings with the requirements of preventing the concrete reinforcing bar from rust and corrosion, and can also be applied to the repair of the
reinforced concrete structures in major construction projects and routine maintenance.