Composite rust inhibitor for steel bars based on long-chain biological nucleic acid and its preparation method and application

A steel bar rust inhibitor and composite technology, applied in anti-corrosion coatings and other directions, can solve the problems of large amount of rust inhibitor, complex synthesis method and high synthesis cost, and achieve the effects of good environmental protection, simple synthesis method and long action time.

Active Publication Date: 2021-04-09
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In addition, the invention patent (CN107032654A) applied by the inventor of the present application on November 15, 2016 discloses a biological nucleic acid rust inhibitor and its preparation method and application. The problems of traditional rust inhibitors such as large dosage, biotoxicity, complex synthesis method, and action time period have been solved, but there is still the problem of slightly high synthesis cost. The present invention overcomes its defects on the basis of the invention patent application CN107032654A

Method used

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  • Composite rust inhibitor for steel bars based on long-chain biological nucleic acid and its preparation method and application
  • Composite rust inhibitor for steel bars based on long-chain biological nucleic acid and its preparation method and application
  • Composite rust inhibitor for steel bars based on long-chain biological nucleic acid and its preparation method and application

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Experimental program
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Effect test

Embodiment 1

[0035] The compound rust inhibitor for steel bars based on long-chain biological nucleic acid in this embodiment is composed of the following components in mass percentage: 96% of sodium phosphate water-based cathodic rust inhibitor for steel bars, and 4% of long-chain biological nucleic acid rust inhibitor. The composite rust inhibitor for steel bars is prepared by the following method: weighing each component according to the mass percentage, mixing and stirring evenly to obtain the finished product.

[0036] According to the above technical scheme, a steel bar section with a diameter of φ10mm and a length of 2cm is selected as the working electrode. Before the experiment, use 200#, 600#, 1000# and 1200# metallographic sandpaper to polish the steel bars step by step. One end of the steel bar section is used as the working surface, and the other end is connected with a copper wire, and then the side surface is wrapped with epoxy resin, and then the working surface is polished...

Embodiment 2

[0041] The composite steel bar rust inhibitor based on long-chain biological nucleic acid of this embodiment is composed of the following components in mass percentage: 94% of sodium phosphate aqueous cathodic steel bar rust inhibitor, and 6% of long-chain biological nucleic acid rust inhibitor. The composite rust inhibitor for steel bars is prepared by the following method: weighing each component according to the mass percentage, mixing and stirring evenly to obtain the finished product.

[0042] According to the above technical scheme, a steel bar section with a diameter of φ10mm and a length of 2cm is selected as the working electrode. Before the experiment, use 200#, 600#, 1000# and 1200# metallographic sandpaper to polish the steel bars step by step. One end of the steel bar section is used as the working surface, and the other end is connected with a copper wire, and then the side surface is wrapped with epoxy resin, and then the working surface is polished into a mirro...

Embodiment 3

[0046] The compound steel rust inhibitor based on long-chain biological nucleic acid of this embodiment is composed of the following components in mass percentage: 92% of sodium phosphate aqueous cathodic steel rust inhibitor, and 8% of long-chain biological nucleic acid rust inhibitor. The composite rust inhibitor for steel bars is prepared by the following method: weighing each component according to the mass percentage, mixing and stirring evenly to obtain the finished product.

[0047] According to the above technical scheme, a steel bar section with a diameter of φ10mm and a length of 2cm is selected as the working electrode. Before the experiment, use 200#, 600#, 1000# and 1200# metallographic sandpaper to polish the steel bars step by step. One end of the steel bar section is used as the working surface, and the other end is connected with a copper wire, and then the side surface is wrapped with epoxy resin, and then the working surface is polished into a mirror surface...

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Abstract

The invention discloses a composite steel bar rust inhibitor based on long-chain biological nucleic acid, a preparation method and application thereof, and is characterized in that: the rust inhibitor is uniformly mixed with long-chain biological nucleic acid and sodium phosphate water; the sodium phosphate The water agent is a commercial sodium phosphate water-based cathodic rust inhibitor for steel bars. The beneficial effects of the present invention are: the composite steel bar rust inhibitor of the present invention is composed of long-chain biological nucleic acid and sodium phosphate aqueous solution, and the good synergistic effect of the two film-forming methods makes the surface of the steel bar form a dense protective film, thereby Effectively prevent anions such as chloride ions from penetrating into the surface of steel bars, improve the corrosion resistance of steel bars and the comprehensive corrosion resistance of concrete, prolong the service life of buildings, and have significant economic and social benefits.

Description

technical field [0001] The invention relates to a composite steel bar rust inhibitor based on long-chain biological nucleic acid, a preparation method and application thereof, and belongs to the technical field of anticorrosion of building materials. Background technique [0002] As an economical and practical structural material, reinforced concrete is widely used in structures such as bridges, roads, buildings, dams, subsea tunnels and large ocean platforms. There are many factors affecting the durability of reinforced concrete, among which the corrosion damage of steel bars in concrete is the primary factor, especially in marine environments and concrete structures sprinkled with deicing salt, steel bars are easily corroded by chloride salts, and the eroded concrete structures Both durability and service life will be greatly reduced. [0003] In the new reinforced concrete structure, due to the existence of high alkalinity pore fluid, a dense passivation film will be for...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/24C09D5/08C04B103/61
CPCC04B40/0039C04B2103/61C09D5/08C04B24/243C04B22/16
Inventor 蒋林华陈晨郭明志徐鹏陈磊
Owner HOHAI UNIV
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