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Preparation method of multifunctional reinforced concrete corrosion inhibitor

A technology of reinforced concrete and corrosion inhibitor, applied in the field of reinforced concrete corrosion inhibitor, can solve the problem of less multifunctional corrosion inhibitor and the like

Active Publication Date: 2015-12-23
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are few reports on multifunctional corrosion inhibitor technology for reinforced concrete

Method used

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  • Preparation method of multifunctional reinforced concrete corrosion inhibitor
  • Preparation method of multifunctional reinforced concrete corrosion inhibitor
  • Preparation method of multifunctional reinforced concrete corrosion inhibitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1: Magnesium-aluminum double hydroxides (MgAl-LDHs) are selected as the precursor. The MgAl-LDHs were calcined at 500°C for 5h, and cooled naturally to room temperature to obtain magnesium aluminum oxides (MgAl-CLDHs). Disperse 0.5g of MgAl-CLDHs in 100mL of 0.1mol / L NaOH solution, stir vigorously at room temperature for 24h, and place the filtered solid product in 100mL of 0.5mol / L, pH 11 potassium hydrogen phthalate solution in the greenhouse. Under stirring for 24h. After filtering, the solid was dried in an oven at 70°C for 48 hours, and the dried product was ground into a powder in a mortar, which was labeled as corrosion inhibitor 1.

Embodiment 2

[0025] Example 2: Change the MgAl-CLDHs in Example 1 to 1 g, and the rest of the conditions are the same, marked as corrosion inhibitor 2.

Embodiment 3

[0026] Example 3: Change the MgAl-CLDHs in Example 1 to 3 g, and the rest of the conditions are the same, marked as corrosion inhibitor 3.

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Abstract

The invention discloses a preparation method of a multifunctional reinforced concrete corrosion inhibitor and relates to a reinforced concrete corrosion inhibitor. The preparation method comprises the steps that 1, layered double hydroxide is used as a precursor to perform calcination; 2, a calcination product obtained through the step 1 is arranged in a sodium hydroxide solution, and stirring, filtration and washing are performed to obtain a filtration product 1; 3, the filtration product 1 is arranged in a potassium hydrogen phthalate solution, and stirring, filtration and washing are performed to obtain a filtration product 2; 4, the filtration product 2 is dried and then is grinded into powder, namely the multifunctional reinforced concrete corrosion inhibitor is obtained. A modification and calcination reforming method is utilized to load various corrosion inhibitor ions in a layered structure of the double hydroxide so as to obtain the multifunctional reinforced concrete corrosion inhibitor, the multifunctional reinforced concrete corrosion inhibitor is used in a concrete structure, can simultaneously reduce the chloride ion concentration in concrete, release the corrosion inhibitor ions, keep the high pH value of the concrete and improve the concrete compactness, has excellent comprehensive anti-corrosion performance for the reinforced concrete structure and can provide multiple effective protection for steel bars embedded in the concrete.

Description

technical field [0001] The invention relates to a reinforced concrete corrosion inhibitor, in particular to a preparation method of a multifunctional reinforced concrete corrosion inhibitor. Background technique [0002] Corrosion of steel bars in concrete is one of the most important reasons affecting the durability and safety of concrete structures. Under the action of environment, the neutralization of concrete and Cl - , SO 4 2- The erosion of erosive species such as steel is an important factor causing corrosion of steel bars. This is closely related to the particularity and complexity of concrete structures. The concrete structure is a complex system in which gas, liquid, and solid phases coexist, and there are pores in the internal structure with uneven sizes from nanometers to micrometers, which makes the O in the air 2 、H 2 O.CO 2 Molecules and Cl in ambient media - , SO 4 2- Such corrosive species diffuse through the pores and cracks of the concrete until...

Claims

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Application Information

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IPC IPC(8): C04B24/04
Inventor 林昌健曹艳辉董士刚
Owner XIAMEN UNIV
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