CN109115864A - Corrosion of steel structure Magnetic sensing methods in armored concrete - Google Patents
Corrosion of steel structure Magnetic sensing methods in armored concrete Download PDFInfo
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- CN109115864A CN109115864A CN201810782710.2A CN201810782710A CN109115864A CN 109115864 A CN109115864 A CN 109115864A CN 201810782710 A CN201810782710 A CN 201810782710A CN 109115864 A CN109115864 A CN 109115864A
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- corrosion
- steel structure
- magnetic field
- armored concrete
- concrete
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
- G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
- G01N27/83—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws by investigating stray magnetic fields
- G01N27/85—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws by investigating stray magnetic fields using magnetographic methods
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Abstract
The present invention relates to a kind of using changes of magnetic field to the lossless detection method of corrosion of steel structure in armored concrete.Using steel construction due to corroding the characteristic for causing permeability to change, steel construction in armored concrete is magnetized using high-intensity magnetic field, using Magnetic Sensor detection magnetizing field surrounding magnetic field variation, realizes the non-destructive testing of corrosion of steel structure.The present invention can carry out testing and evaluation to the buried corrosion of steel structure situation in inside concrete in the case where not damaging concrete surface.
Description
Technical field
The present invention relates to a kind of magnetic NDT method method of corrosion of steel structure, belong to ferrimagnet non-destructive testing and
Electromagnetic Testing Technology field can be applied to the durability testing and evaluation of structural engineering field.
Background technique
Armored concrete meets one of material as the more early development and application of the mankind, obtains in modern building fabric extensively
Application.Reinforcement corrosion is to influence one of the principal element of structure durability, in prior art, number of patent application 03115903.6
" detection method of corrosion of concrete bar in reinforced concrete ", this method arranged in armored concrete in advance several bar reinforcements and
Stainless steel bar realizes the long term monitoring of reinforcement corrosion by measuring galvanic corrosion electric current and potential difference between the two.This method
It is only applicable to New Buildings and could be used when building and building pre-buried sensor, for not arranging above-mentioned biography largely
The building of sensor is not available then.
Summary of the invention
The purpose of the present invention is to propose to a kind of detection methods for detecting Reinforcement Bar Corrosion in Reinforced Concrete.Caused using corrosion
The variation of reinforcing bar magnetic conductivity measures reinforcement corrosion situation.Its principle is to be tightly attached to reinforced concrete surface with a high-intensity magnetic field, right
It is buried to be magnetized in reinforcing bar wherein, and a stable space magnetic field is formed, if there are etch state, the spaces in reinforcing bar
Magnetic field can change, by measuring this variation, so that it may obtain the corrosion condition of reinforced concrete.
Reinforcement in concrete corrosion detecting method proposed by the present invention the following steps are included:
1, the magnetizing assembly being made of permanent magnet and armature is applied on armored concrete along reinforcing bar axis direction；
2, with the magnetic field sensor measurement being placed between two permanent magnets along the magnetic field strength of reinforcing bar axis direction；
3, the magnetic field distribution and reinforcement corrosion situation measured is at corresponding relationship.
It may not only be applied to the detection of New Buildings reinforcement corrosion using detection method of the invention, and can be used for old build
Build the detection of object.
Detailed description of the invention
Fig. 1 is the detection schematic diagram of the method for the present invention；
Fig. 2 is the signal waveform that analog detection obtains.
Specific embodiment
(1) is armature in Fig. 1, and (2) are permanent magnet, and (3) are detecting element, and (4) are reinforced beam, and (5) are steel
Muscle.Armature (1), permanent magnet (2) and reinforcing bar (5) constitute magnetic loop.
Fig. 2 show analog detection and obtains signal waveform.Simulating reinforced concrete structure is put at away from magnetizer 100mm
A prestressing force steel hinge line and steel pipe are set, steel hinge line is put into and is extracted out the cross section metal product variation of steel pipe simulation reinforcing bar.Fig. 2 institute
Cross section metal product variation when showing signal waveform characterization steel hinge line extraction and being put into steel pipe.
Claims (1)
1. corrosion of steel structure detection method in a kind of armored concrete, it is characterised in that:
(1) magnetizer being made of permanent magnet and armature is placed in and rod iron parallel direction；
(2) with the Magnetic Sensor measurement being placed between two permanent magnets along the magnetic field strength of reinforcing bar axis direction；
(3) the above-mentioned variation for measuring magnetic field strength and corrosion of steel structure degree are at corresponding relationship, to measure corrosion of steel structure shape
Condition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810782710.2A CN109115864A (en) | 2018-07-17 | 2018-07-17 | Corrosion of steel structure Magnetic sensing methods in armored concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810782710.2A CN109115864A (en) | 2018-07-17 | 2018-07-17 | Corrosion of steel structure Magnetic sensing methods in armored concrete |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109115864A true CN109115864A (en) | 2019-01-01 |
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ID=64862736
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810782710.2A Pending CN109115864A (en) | 2018-07-17 | 2018-07-17 | Corrosion of steel structure Magnetic sensing methods in armored concrete |
Country Status (1)
| Country | Link |
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| CN (1) | CN109115864A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110987082A (en) * | 2019-12-21 | 2020-04-10 | 广州新稳房屋安全鉴定有限公司 | Safety detection method for reinforced concrete building structure |
-
2018
- 2018-07-17 CN CN201810782710.2A patent/CN109115864A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110987082A (en) * | 2019-12-21 | 2020-04-10 | 广州新稳房屋安全鉴定有限公司 | Safety detection method for reinforced concrete building structure |
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Legal Events
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| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20190101 |