Steel bar corrosion inhibitor for marine concrete and preparation method thereof

A steel rust inhibitor and marine concrete technology, applied in the field of building materials, can solve problems such as failure and performance degradation of reinforced concrete structural materials, and achieve the effects of reducing chlorine content, increasing steel corrosion resistance, and improving protection performance

Active Publication Date: 2020-05-15
GUILIN UNIVERSITY OF TECHNOLOGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the corrosion of steel bars will lead to the degradation or even failure of reinforced concrete structural materials.

Method used

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  • Steel bar corrosion inhibitor for marine concrete and preparation method thereof
  • Steel bar corrosion inhibitor for marine concrete and preparation method thereof
  • Steel bar corrosion inhibitor for marine concrete and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A steel rust inhibitor for marine concrete, comprising 40 parts of N, N-dimethylethanolamine, 25 parts of polycarboxylic acid terpolymer, 7 parts of 2-phenylimidazoline quaternary ammonium salt by weight parts , 12 parts of hydroxide, 2 parts of water-based polyaniline, 3 parts of polyol phosphate, 50 parts of water, the pH is 12.7. The preparation method comprises the following steps: (1) adding water into a container, heating to 45° C., adding N,N-dimethylethanolamine, 2-phenylimidazoline quaternary ammonium salt, and water-based polyaniline in sequence, and stirring for 5 minutes; (2) Continue heating to 60° C., add polyol phosphate and polycarboxylic acid terpolymer again and stir for 5 minutes, and finally add hydroxide to adjust the pH value.

Embodiment 2

[0028] A steel rust inhibitor for marine concrete, comprising 50 parts of N, N-dimethylethanolamine, 30 parts of polycarboxylic acid terpolymer, 10 parts of 2-phenylimidazoline quaternary ammonium salt by weight parts , 15 parts of hydroxide, 5 parts of water-based polyaniline, 5 parts of polyol phosphate, 60 parts of water, the pH is 12.4. The preparation method comprises the following steps: (1) adding water into a container, heating to 50° C., adding N,N-dimethylethanolamine, 2-phenylimidazoline quaternary ammonium salt, and water-based polyaniline in sequence, and stirring for 5 minutes; (2) Continue heating to 65° C., add polyol phosphate and polycarboxylic acid terpolymer again and stir for 5 minutes, and finally add hydroxide to adjust the pH value.

Embodiment 3

[0030] A steel rust inhibitor for marine concrete, comprising 30 parts of N, N-dimethylethanolamine, 20 parts of polycarboxylic acid terpolymer, 5 parts of 2-phenylimidazoline quaternary ammonium salt by weight parts , 10 parts of hydroxide, 1 part of water-based polyaniline, 3 parts of polyol phosphate, 40 parts of water, the pH is 12.2. The preparation method comprises the following steps: (1) adding water into a container, heating to 40° C., adding N,N-dimethylethanolamine, 2-phenylimidazoline quaternary ammonium salt, and water-based polyaniline in sequence, and stirring for 5 minutes; (2) Continue heating to 60° C., add polyol phosphate and polycarboxylic acid terpolymer again and stir for 6 minutes, and finally add hydroxide to adjust the pH value.

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PUM

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Abstract

The invention discloses a steel bar corrosion inhibitor for marine concrete and a preparation method of the steel bar corrosion inhibitor. The corrosion inhibitor is prepared from 30 to 50 parts of N,N-dimethyl ethanolamine, 20 to 30 parts of polycarboxylic acid terpolymer, 5 to 10 parts of 2-phenylimidazoline quaternary ammonium salt, 10 to 15 parts of hydroxide, 1 to 5 parts of water-based polyaniline, 2 to 5 parts of polyol phosphate and 40 to 60 parts of water, and the pH value is 11 to 13.5. The concrete reinforcing steel bar corrosion inhibitor has good retaining performance for concrete structures, has efficient reinforcing steel bar corrosion inhibition performance, and can be applied to reinforced concrete structures such as harbor engineering, coastal buildings and civil buildings.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a steel bar rust inhibitor for marine concrete and a preparation method thereof. Background technique [0002] Reinforced concrete is a composite material composed of cement, sand, stone and steel bars. The role of reinforcement is to improve the tensile properties of concrete. Reinforced concrete is one of the most widely used structural materials in the world. Cement in concrete is an alkaline material raw material. When cement is hydrolyzed, a large amount of Ca(OH) will be produced 2 , and filled the pores of the concrete to form Ca(OH) 2 The supersaturated solution of the solution usually has a pH between 12 and 13. When the steel bar is wrapped in a strong alkaline medium, a layer of dense spinel solid solution Fe will be formed on its surface. 3 o 4 –γFe 2 o 3 Passive film, which can prevent the corrosion of steel bars. [0003] However, the corrosion of steel b...

Claims

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Application Information

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IPC IPC(8): C04B24/28C08F283/06C08F220/06C08F228/02C04B103/61
CPCC04B40/0039C04B2103/61C08F283/065C04B24/122C04B24/128C04B22/06C04B24/28C04B24/003C04B24/163C08F220/06C08F228/02
Inventor 明阳陈平李玲潘格林陈新甘国兴刘荣进陈宣东赵艳荣韦家崭
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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