Zeolite-like zinc-based imidazolate metal organic framework steel bar corrosion inhibitor as well as preparation method and application thereof

A metal-organic framework and zinc-based imidazolate technology, which is applied in the field of reinforced concrete rust inhibitors, can solve the problems of low efficiency of rust inhibition, performance toxicity of concrete materials, etc.
CN112679749AActive Publication Date: 2021-04-20SOUTH CHINA UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SOUTH CHINA UNIV OF TECH
Publication Date
2021-04-20

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Abstract

The invention belongs to the field of steel bar corrosion inhibitors for concrete engineering, and discloses a zeolite-like zinc-based imidazolate metal organic framework steel bar corrosion inhibitor, and a preparation method and an application thereof. Zinc ions are adopted as metal nodes, and are subjected to coordination self-assembly with imidazole organic ligands to form the zeolite-like zinc-based imidazolate steel bar corrosion inhibitor, wherein the structural formula of the zeolite-like zinc-based imidazolate MOFs is shown in the specification, and R is one of methyl, nitro and formyl. According to the invention, the zeolite-like zinc-based imidazolate MOFs have the advantages of high chemical stability, strong adsorption effect on the surface of the steel bar, high hydrophobicity after adsorption and film formation and the like under the high-alkalinity condition of concrete, and play a role in efficiently inhibiting corrosion of the steel bar in the concrete.
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Description

technical field

[0001] The invention belongs to the field of rust inhibitors for reinforced concrete, and more specifically relates to a zeolite-like zinc-based imidazolate metal-organic frame steel rust inhibitor, a preparation method and an application. Background technique

[0002] Reinforced concrete is widely used in the field of construction engineering, but when the external corrosive medium (especially chloride ion) penetrates into the surface of the steel bar through the porous structure of the concrete and accumulates, it will cause corrosion damage to the steel bar in the concrete, and the accumulation of corrosion products can further Cause concrete cracking and spalling, thereby seriously reducing the durability of reinforced concrete structures. The addition of organic steel rust inhibitors in fresh concrete is considered to be the most cost-effective and operable technical means to inhibit the corrosion of steel bars in concrete, and has been widely used in th...

Claims

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