A kind of amorphous protective corrosion-resistant steel bar and preparation method thereof

Abstract

The invention discloses an amorphous protection corrosion resisting steel bar and a preparing method thereof. A powder core wire used in a coating on the steel bar comprises following components including, by weight percent, 25-28 wt% of Cr, 11-13 wt% of B, 0.2-0.7 wt% of C, 0.5-2.5 wt% of P, 3-4.5 wt% of Cu, 1.5-3.5 wt% of Ni, 5-10 wt% of Mo, 2-4 wt% of Mn, 0.35-0.57 wt% of Ti and the balance Fe.After the components are dried and placed in a powder mixing machine according to the proportion to be evenly mixed, the components are placed in a U-shaped 304 stainless steel strip groove, the U-shaped groove is sealed, and drawing is conducted to form filaments through a wire drawing die. A steel bar body is pretreated, the powder core wire serves as the raw material, the coating is prepared through the supersonic speed arc spraying technology, and hole sealing treatment is conducted. The coating is high in amorphous content and bonding strength, low in porosity, high in corrosion resistance and low in cost, and a new path is provided for steel bar corrosion resisting.

Description

technical field [0001] The invention belongs to the field of building engineering materials used in material processing engineering, and in particular relates to an amorphous protective corrosion-resistant steel bar and a preparation method thereof. Background technique [0002] Steel corrosion is the main cause of damage to reinforced concrete structures. At present, for large ports, sea-crossing bridges, dams and other infrastructure, people are more concerned about the durability of concrete. However, the actual life of many large-scale infrastructures is shorter than the design life, especially in sea, coastal and saline-alkali areas. - The existence of steel bars will accelerate the corrosion rate, greatly reducing the service life of reinforced concrete structures, and bringing huge damage to the national economy and the safety of people's lives and property. [0003] Amorphous alloy is an amorphous homogeneous single phase, which has no crystal defects such as grain...

AI Technical Summary

Problems solved by technology

The bonding strength of the organic anti-corrosion coating on the surface of the steel bar is low, the construction is difficult and the protective film is easily damaged during the process of transportation and reinforcement; in the steel bar rust inhibitor, if the amount of the anodic steel rust inhibitor is insufficient, the corrosion may be accelerated, while the cathodic type When the steel rust inhibitor is used alone, its effect is not obvious, the dosage is generally large, and the cost is high; the enhanced anti-carbonation ability of foundation concrete has better anti-penetration ability, but the protective agent is flammable and toxic, which is not good for breathing. And it will corrode the skin; the anode of the negative (cathode) protection method needs to be replaced and is limited by the conditions of use

It can be seen that the current protective measures for steel bars have a certain protective effect, but they cannot effectively solve the corrosion problem of steel bars. The amorphous protective coating has excellent corrosion resistance, which provides a new solution for steel bar protection.

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