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Protective agent for bridge with steel structure, preparation method thereof and application thereof

A protective agent and technology for steel structure bridges, applied in the direction of anti-corrosion coatings, coatings, etc., can solve the problems that it is difficult to guarantee the corrosion damage of steel structure bridges

Inactive Publication Date: 2012-10-03
CENT SOUTH UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

From the existing protective agents and their application effects, it is difficult to ensure that steel bridges will not be damaged by corrosion by using protective agents with a single performance

Method used

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  • Protective agent for bridge with steel structure, preparation method thereof and application thereof
  • Protective agent for bridge with steel structure, preparation method thereof and application thereof
  • Protective agent for bridge with steel structure, preparation method thereof and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0096] Mix 0.1 kg of aluminum isopropoxide, 0.3 kg of butyl titanate, 1.7 kg of tetraethyl silicate, and 6 kg of absolute ethanol for use; mix 10 kg of absolute ethanol, 0.4 kg of distilled water, and 0.1 kg of ammonia water ( The mass fraction is 25%) into a reactor equipped with a reflux condensing device and an electric stirrer, stirred at a speed of 150 rpm for 1-2 hours, mixed uniformly and then slowly heated up; when the temperature rose to 45-60°C, Add the organic alkoxide and ethanol mixture dropwise into the reactor, stir rapidly at a speed of 200 rpm, and react for 2-4 hours; stir and age at room temperature for 24 hours to obtain the desired alcohol sol of the inorganic nanomaterial. Under the condition of low-speed stirring, add 0.18 kg of methacryloxypropyltrimethoxysilane dropwise into the alcohol sol of inorganic nanomaterials, react at room temperature for 22 hours, raise the temperature to 50°C and react at constant temperature for 2 hours, and the surface modi...

Embodiment 2

[0100] The organic / inorganic composite fluorosilicone styrene-acrylic polymer emulsion was prepared as in Example 1.

[0101] Add 80 kg of organic / inorganic composite fluorosilicone styrene-acrylic polymer emulsion and 20 kg of distilled water into a mixer with a stirrer, and mix evenly at a speed of 100 rpm; heat up to 40±5°C, and lithium silicate 0.8 kg, 0.1 kg of sodium molybdate, 0.7 kg of benzotriazole and 1 kg of absolute ethanol, 0.6 kg of sodium gluconate, 0.04 nanometer titanium dioxide, 5 kg of ethanolamine and 0.06 kg of sodium tetraborate are slowly added to the mixer in turn and stir for 2-6 hours to obtain the protective agent for steel structure bridges.

Embodiment 3

[0103] The organic / inorganic composite fluorosilicone styrene-acrylic polymer emulsion was prepared as in Example 1.

[0104] Add 70 kg of organic / inorganic composite fluorosilicone styrene-acrylic polymer emulsion and 30 kg of water into a mixer with a stirrer, and mix evenly at a speed of 100 rpm; heat up to 40±5°C, and lithium silicate 0.8 kg, 0.12 kg of sodium molybdate, 0.6 kg of benzotriazole and 1 kg of absolute ethanol, 0.5 kg of sodium gluconate, 0.05 kg of nano-titanium dioxide, 3 kg of ethanolamine and 0.06 kg of sodium tetraborate are slowly added to the mixer in turn and stir for 2-6 hours to obtain the protective agent for steel structure bridges.

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Abstract

The invention discloses a protective agent for a bridge with a steel structure, a preparation method thereof and application thereof. The protective agent comprises the following components: an organic / inorganic composite fluorosilicone styrene polymer, lithium silicate, sodium molybdate, benzotriazole, nanometer titanium dioxide, sodium gluconate, ethanolamine, absolute ethanol and distilled water. Corrosion inhibiting ingredients contained in the protective agent can be attached to the metal surface of the bridge with the steel structure, so that a compact protective film is formed on the metal surface due to a passivating reaction for corrosion inhibition and corrosion prevention; a low-surface energy fluorosilicone styrene polymer component contained in the protective agent can be cured to form a film for playing the hydrophobic and protective roles; a nanometer component can improve the performance of ultraviolet aging resistance of a film layer, improve the performance of the polymer and provide the excellent self-cleaning performance and the like for the cured film; and hydroxyl generated by hydrolyzing siloxane groups can perform a condensation reaction with hydroxyl on the surface of the bridge with the steel structure to generate a chemical bond so as to improve adhesive power between the film layer and a matrix material and improve interface bonding. The protective agent is high in stability, non-toxic, environment-friendly, multiple in functions and easy to construct, can be widely used for the protection of the structural engineering of various bridges with the steel structures, and is favorable for improving the service life of the bridge with the steel structure.

Description

technical field [0001] The invention relates to a protective agent for a steel structure bridge, in particular to a water-based protective agent capable of improving the service life of a steel structure bridge and a preparation and application method thereof. Background technique [0002] Steel bridges are widely used due to their advantages of large span, strong bearing capacity and short construction period. Bridges are mainly built in high-humidity environments such as across rivers and bays. External corrosive substances (such as chloride salts, acid rain, and sulfates, etc.) can easily condense and accumulate on the surface of steel structure bridges along with water vapor, which can easily cause steel structure bridges. Corrosion damage. At the same time, under the interaction of physical and chemical factors such as salt spray, acid rain, freezing, rain, snow and light in the natural environment, steel bridges are prone to performance degradation and damage. How to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D151/10C09D133/16C09D133/08C09D5/08C09D7/12C08F292/00C08F220/22C08F230/08C08F220/18
Inventor 刘鹏余志武宋力黄可龙何章兴李进洲
Owner CENT SOUTH UNIV
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