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Migrating type composite rebar corrosion inhibitor as well as preparation method and application thereof

A technology of composite steel bar and rust inhibitor, applied in the field of building materials, can solve the problem that the efficiency is not as obvious as that of the anode type, and achieve the effects of reducing self-corrosion potential and corrosion current density, excellent corrosion and rust inhibition performance, and simple preparation method.

Inactive Publication Date: 2014-03-12
METALS & CHEM RES INST CHINA ACAD OF RAILWAY SCI +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this type of substance is not dangerous, when it acts alone, its effectiveness is not as obvious as that of the anodic type

Method used

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  • Migrating type composite rebar corrosion inhibitor as well as preparation method and application thereof
  • Migrating type composite rebar corrosion inhibitor as well as preparation method and application thereof
  • Migrating type composite rebar corrosion inhibitor as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～3

[0045] Examples 1~3 A kind of migratory composite steel bar rust inhibitor

[0046] The raw material composition is shown in Table 1; it is prepared by the following method:

[0047] (1) Heat the sorbitol to 80~100℃ to melt the sorbitol completely and stir evenly;

[0048] (2) Add triethanolamine to it and stir evenly;

[0049] (3) Add boric acid again and increase the temperature to 100~120℃. After the boric acid is completely dissolved, keep it for 1~2h;

[0050] (4) Cool to about 80°C, add deionized water, stir evenly, and add sodium monofluorophosphate until completely dissolved.

[0051] Table 1 Example 1-3 Raw Material Composition

[0052]

Embodiment 4

[0067] Example 4 A kind of migratory composite steel bar rust inhibitor

[0068] The composition of raw materials is shown in Table 3; prepared by the following method:

[0069] (1) Heat the n-butanol to 60°C and stir evenly;

[0070] (2) Add ethanolamine to it and stir evenly;

[0071] (3) Add benzoic acid again and increase the temperature to 100°C. After the benzoic acid is completely dissolved, keep it warm for 1.5h;

[0072] (4) Cool to about 80°C, add deionized water, stir evenly, and add trisodium phosphate until completely dissolved.

Embodiment 5

[0073] Example 5 A kind of migratory composite steel bar rust inhibitor

[0074] The composition of raw materials is shown in Table 3; prepared by the following method:

[0075] (1) Heat isopropanol to 70°C and stir evenly;

[0076] (2) Add diethanolamine to it and stir evenly;

[0077] (3) Add 1,3-glutaric acid again, and increase the temperature to 110°C. After the 1,3-glutaric acid is completely dissolved, keep it warm for 2h;

[0078] (4) Cool to about 80°C, add deionized water, stir evenly, and add sodium carbonate until it is completely dissolved.

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Abstract

The invention provides a migrating type composite rebar corrosion inhibitor as well as a preparation method and application thereof. The migrating type composite rebar corrosion inhibitor comprises the following raw materials according to parts by weight: 8-20 parts of fatty alcohol with the boiling point more than or equal to 60 DEG C, 5-11 parts of amine, 4-17 parts of organic acid or inorganic acid which is solid at the normal temperature, 4-8 parts of inorganic salt, and 45-78 parts of water, wherein the inorganic salt is chosen from phosphate or carbonate. The migrating type composite rebar corrosion inhibitor can migrate to the surface of a rebar to form a protection layer on the surface of the rebar, and chloride ions can also be filtered out so as to slow down the corrosion speed of the rebar. The corrosion inhibitor provided by the invention is simple in construction process and low in cost, and the sources of the raw materials are not limited.

Description

Technical field [0001] The invention belongs to the field of building materials, and specifically relates to a migratory composite steel bar rust inhibitor, and a preparation method and use method thereof. Background technique [0002] Rebar corrosion is the most important factor affecting the durability of reinforced concrete in the world today. In recent years, due to a series of reasons such as environmental degradation, the number of domestic railway concrete beam diseases has increased sharply, which has become a major problem for bridge maintenance workers. According to the statistical data of the national railway system autumn inspection in 1998 alone, the failure rate of the whole road bridge was 19.39%, and the more serious diseases included serious cracks, serious water leakage and insufficient carrying capacity. The domestic highway and municipal departments have similar situations. Like the reinforced concrete overpasses in Beijing and Tianjin, although many have no...

Claims

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Application Information

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IPC IPC(8): C04B24/12C04B103/61
Inventor 李海燕魏曌贾恒琼刘子科吴韶亮李洪刚王涛张恒邵丕彦
Owner METALS & CHEM RES INST CHINA ACAD OF RAILWAY SCI
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