Efficient alkoxylated imidazoline derivative corrosion inhibitor as well as preparation method and application thereof

Abstract

The invention discloses application of an efficient alkoxylated imidazoline derivative corrosion inhibitor. When the efficient alkoxylated imidazoline derivative corrosion inhibitor is used, standard cement, standard sand, water and the corrosion inhibitor are mixed in proportion, stirred uniformly, compacted until slurry is returned, and then inserted into a steel bar, and corrosion inhibitor molecules are adsorbed to the surface of the steel bar through diffusion to play a role in corrosion inhibition. Due to the introduction of an alkoxy chain segment, the molecules have the structure of a polycarboxylic acid water reducer monomer, the compatibility of the corrosion inhibitor molecules and concrete can be realized to the greatest extent, the physical and chemical properties of the concrete cannot be seriously influenced, the steric hindrance of the molecules can be increased, the immersion of chloride ions can be blocked, the effect of dispersing the concrete can be achieved, the slump loss of the concrete is prevented, obvious delayed coagulation is not caused, and the service life of the steel bar in an erosion environment can be prolonged to a great extent.

Description

technical field [0001] The invention relates to the technical field of rust inhibitors, in particular to a preparation method of a high-efficiency alkoxylated imidazoline derivative rust inhibitor and its application in reinforced concrete. Background technique [0002] Reinforced concrete is a building material widely used in modern society. It is used in the construction of structures in all walks of life and plays a great role in the construction of the national economy. However, due to the aggravation of environmental pollution and other reasons, reinforced concrete structures often begin to show cracks, corrosion of steel bars and other deterioration phenomena after a short period of use. The premature failure of reinforced concrete structures caused by corrosion of steel bars is a prominent disaster in the world today. Therefore, preventing the corrosion of steel bars from the source becomes the key, among which the use of steel bar rust inhibitor is the most convenie...

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Problems solved by technology

Some oxide film-type rust inhibitors such as potassium dichromate will reduce the compressive strength of concrete more (20%-40%), while stannous chloride has a shorter action time. The commonly used rust inhibitors are sodium nitrite and nitrite Although calcium nitrate has little effect on the strength of concrete and has a good anti-rust effect, they only have anti-rust effect when used in a large amount, and nitrite is toxic and has certain damage to the environment and health. Banned in some countries

Precipitated film-type rust inhibitors such as glycerophosphate sodium salt and hydroxyphosphate often have weak binding force with metals, and the texture is porous and loose, so their anti-rust effect is weaker than that of oxidized film layers.

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