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Analysis method for localized corroding based on electrochemistry noise

A technology of electrochemical noise and local corrosion, which is used in electrochemical variables of materials, analytical materials, measurement devices, etc.

Active Publication Date: 2007-08-15
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
  • Description
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Problems solved by technology

The corrosion monitoring device of the present invention adopts a four-electrode probe, which overcomes the shortcomings that the three-electrode probe cannot measure the real corrosion potential and the obtained noise potential contains random DC drift introduced by the pseudo-reference electrode, and can simultaneously collect Two kinds of potential signals and one kind of current signal, and it is equipped with software for automatically segmenting raw data, calculating all statistics of each segment, cluster analysis and discriminant analysis

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  • Analysis method for localized corroding based on electrochemistry noise
  • Analysis method for localized corroding based on electrochemistry noise
  • Analysis method for localized corroding based on electrochemistry noise

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Embodiment Construction

[0037] The present invention will be further described below in conjunction with the accompanying drawings and implementation examples. The schematic diagram of the structure of the localized corrosion evaluation device based on electrochemical noise is shown in Figure 1, four-electrode probe 1, impedance converter 2, DC compensator 3, dual-channel chopper-stabilized zero operational data amplifier 4, zero-resistance ammeter 5 , multi-channel low-pass filter 6 and A / D converter 7 constitute an electrochemical noise monitoring system, and data memory 8 is used to store the original noise data collected, embedded microprocessor (ARM) or digital signal processor (DSP) 9 is the noise data analysis system, which forms a man-machine dialogue system with the keyboard and LCD, and can adjust and correct relevant parameters when necessary.

[0038] The analysis method of the present invention will be described below in conjunction with accompanying drawing 2, which is a flow chart of t...

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Abstract

This invention provides one local erosion analysis method and device based on electrical and chemical noise, wherein, the device adopts four electrode detector to overcome three electrode for one measurement and generates two level signals and one current signal; the stored original noise data are computing each section through software; then integrating all analysis functions to sort all parameters; according judgment equation to analyze and give out the erosion status results.

Description

technical field [0001] The invention relates to a metal material corrosion monitoring technology, in particular to a local corrosion monitoring device and analysis method. Background technique [0002] Corrosion failure of metal materials has caused huge economic losses to countries all over the world, and may also bring serious social and environmental disasters. More than 90% of the loss of corrosion failure is caused by localized corrosion, but the existing on-site corrosion on-line monitoring technologies, such as gravimetric method, linear polarization technology and resistance probe, etc., can only detect the uniform corrosion of metal materials and environmental corrosion. It is difficult to monitor localized corrosion. Therefore, it is of great practical and economic significance to establish an effective technology for monitoring and preventing and controlling localized corrosion. Electrochemical noise monitoring technology can not only obtain local corrosion info...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N17/02G01N27/30G06F17/00
Inventor 郭兴蓬黄家怿邱于兵董泽华
Owner HUAZHONG UNIV OF SCI & TECH
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