Organic reinforcing steel bar rust inhibitor for reinforced concrete

A steel bar rust inhibitor and organic technology, applied in the field of organic steel bar rust inhibitor, can solve the problems of limited promotion and use, the rust inhibitor is not environmentally friendly, the price of sodium molybdate is expensive, etc., and achieves excellent corrosion and rust inhibition performance and environmental protection. Good results

Active Publication Date: 2013-01-02
MCC ENERGY SAVING & ENVIRONMENTAL PROTECTION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this kind of rust inhibitor is not environmentally friendly, and insufficient dosage may aggravate the corrosion of steel bars
Sodium molybdate, diethylenetriamine, vinylthiourea and 1,4-butynediol are mentioned in the patent CN1872770A, wherein sodium molybdate, like calcium nitrite, has the problem that insufficient dosage will accelerate the corrosion of concrete steel bars, and molybdenum Sodium acid is expensive, and its popularization and use are greatly restricted

Method used

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  • Organic reinforcing steel bar rust inhibitor for reinforced concrete
  • Organic reinforcing steel bar rust inhibitor for reinforced concrete
  • Organic reinforcing steel bar rust inhibitor for reinforced concrete

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Weigh 100g of diethanolamine, 150g of N,N-dimethylethanolamine and add it into a glass container, then add 150g of hexamethylphosphoric triamide under stirring; simultaneously weigh 450g of water and add it to the glass container, weigh benzene Sodium formate 50g, naphthalenesulfonic acid formaldehyde condensate 100g, under the state of stirring, successively add into the container of weighing water, fully stir until the solid is uniformly dissolved, then add into the solution prepared in the first step, and stir well to get the resistance rust products.

Embodiment 2

[0025] Weigh 150g of N,N-dimethylethanolamine and add it into a plastic container, then add 50g of N,N-tetramethylenephosphoramide and 100g of triethylenetetramine successively under stirring; at the same time, weigh 550g of water and add it to the glass container In the method, weigh 100g of potassium benzoate and 50g of naphthalenesulfonic acid formaldehyde condensate, and add them into the container of weighed water successively under stirring, and stir well until the solids are uniformly dissolved, then add them into the solution prepared in the first step, and stir After uniformity, the rust inhibitor product is obtained.

Embodiment 3

[0027] Weigh 50g of N,N-diethylethanolamine and add it to a stainless steel container, then add 150g of diethylenetriamine under stirring; at the same time, weigh 500g of water and add it to a stainless steel container, weigh 150g of ammonium benzoate, naphthalenesulfonate formaldehyde Add 150g of the condensate into the container of weighed water one by one while stirring, stir well until the solid is uniformly dissolved, then add it into the solution prepared in the first step, and stir well to get the rust inhibitor product.

[0028] The present invention has a good antirust effect on steel bars in reinforced concrete, and has no adverse effect on the performance of concrete. The performance indicators comply with the "Technical Regulations for the Use of Steel Bar Rust Inhibitors" YB / T 9231. The indicators are shown in Table 2:

[0029] Table 2 performance index of rust inhibitor

[0030]

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Abstract

The invention provides an organic reinforcing steel bar rust inhibitor for reinforced concrete. The organic reinforcing steel bar rust inhibitor is prepared from the following components in percentage by mass: 5.0 to 25.0 percent of organic alkylol amine, 5.0 to 15.0 percent of aromatic salt, 5.0 to 15.0 percent of naphthalene sulfonate formaldehyde condensate, 0.0 to 15.0 percent of aliphatic polyamine, 0.0 to 15.0 percent of phosphoryl organic matter and 45.0 to 55.0 percent of water. Compared with a conventional reinforcing steel bar rust inhibitor, the organic reinforcing steel bar rust inhibitor of the invention has the advantages of high corrosion and rust inhibition, high environmental friendliness and the like and can be widely applied to construction of newly stirred reinforced concrete for harbor work, coastal buildings, buildings at alkaline land and other constructed buildings with requirements on rusting prevention of the reinforcing steel bar in the concrete.

Description

technical field [0001] The invention relates to an organic steel bar rust inhibitor for reinforced concrete, belonging to the technical field of building materials. Background technique [0002] Reinforced concrete is currently the most widely used building material, but the corrosion of steel bars causes damage to buildings and structures, causing major economic losses in engineering construction at home and abroad. The methods of controlling the corrosion of concrete reinforcement include the use of corrosion-resistant reinforcement, cathodic protection, coated (plated) reinforcement, concrete surface coating, and reinforcement rust inhibitors. Effective, it is the most commonly used technical measure to prevent corrosion of steel bars. According to reports, before 1993, only 20 million cubic meters of concrete used steel corrosion inhibitors in the world, and by 1998, at least 500 million cubic meters of concrete had used steel corrosion inhibitors. As one of the import...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/22C04B103/61
CPCC04B2111/24C04B2111/74C04B2111/26C04B2103/0005C04B2111/00017C04B2103/0007C04B40/0039
Inventor 孙俊刘彦东周玉生王晓丰王建成仲朝明
Owner MCC ENERGY SAVING & ENVIRONMENTAL PROTECTION
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