Composite steel bar corrosion inhibitor

Abstract

The invention relates to a composite steel bar corrosion inhibitor, and belongs to the field of corrosion prevention of building materials. The composite steel bar corrosion inhibitor comprises the following components in percentage by weight: 5 to 15 percent of organic compound polyvinyl alcohol (PVA), 10 to 20 percent of inorganic matter calcium nitrite, 5 to 15 percent of nano silicon dioxide and the balance of deionized water. A using method of the corrosion inhibitor comprises the following steps of: directly spraying the corrosion inhibitor on a steel production line, reacting by means of the heat of steel, and tightly attaching to the surface of the steel to form a compact oxide film. The composite steel bar corrosion inhibitor containing the nano silicon dioxide has high corrosion inhibition property and environment friendliness, is easy to produce, does not have any adverse effect, and can be widely used for the newly constructed concrete structures of civil buildings, coastal buildings, harbor engineering, bridges and roads and the like.

Description

technical field [0001] The invention relates to a composite steel bar rust inhibitor, which belongs to the technical field of anticorrosion of building materials. Background technique [0002] As an economical and practical structural material, reinforced concrete is widely used in structures such as bridges, buildings, dams, subsea tunnels and large ocean platforms. Corrosion of steel bars in concrete has become the main factor affecting the durability of reinforced concrete structures in the world today. [0003] The influence of steel bar corrosion on the performance of reinforced concrete structures is mainly reflected in three aspects: [0004] ① Corrosion of the steel bar reduces the cross section of the steel bar, thereby reducing the bearing capacity of the steel bar and reducing the ultimate elongation; [0005] ②The volume of the steel bar corrosion product is much larger than the volume before corrosion, generally up to 2~3 times, the volume expansion pressure c...

AI Technical Summary

Problems solved by technology

[0004] ① Corrosion of the steel bar reduces the cross section of the steel bar, thereby reducing the bearing capacity of the steel bar and reducing the ultimate elongation;

[0005] ②The volume of steel bar corrosion products is much larger than the volume before corrosion, generally up to 2~3 times, the volume expansion pressure causes the concrete around the steel bar to generate tensile stress, cracks along the bar, and reduces the durability of the structure;

[0006] ③ Corrosion of steel bars reduces the bond between steel bars and concrete

However, when the dosage is insufficient, it may cause localized corrosion and accelerate the progress of corrosion